ПОРИСТЫЙ УГЛЕРОДНЫЙ ПРОДУКТ И СПОСОБ ЕГО ПОЛУЧЕНИЯ

Изобретение относится к получению пористых углеродных изделий и может быть использовано в электродах для топливных ячеек, суперконденсаторах и электрических аккумуляторах, в качестве адсорбентов и других областях. Заявленный способ получения пористого углеродного продукта включает изготовление монолитного шаблона из неорганического матричного материала, имеющего соединенные друг с другом поры, инфильтрирование пор шаблона, углеродом или веществом-предшественником углерода, образующим каркас сырца, содержащий углерод, окруженный матричным материалом, и кальцинирование каркаса сырца, с образованием пористого углеродного продукта. Шаблон получают осаждением ультрадисперсного порошка путем подачи в реакционную зону гидролизуемого или окисляемого исходного соединения матричного материала, где оно превращается в частицы матричного материала путем гидролиза или пиролиза, при этом частицы матричного материала являются агломерированными или агрегированными и образуют шаблон. Технический результат ...

УПРОЧНЕННЫЙ СТРОИТЕЛЬНЫЙ БЛОК, ИЗГОТОВЛЕННЫЙ ИЗ ПЕНОБЕТОНА АВТОКЛАВНОГО ТВЕРДЕНИЯ (ПАК)

Группа изобретений относится к упрочненному строительному блоку, изготовленному из пенобетона автоклавного твердения, и способу его изготовления. Упрочненный строительный блок изготовлен из пенобетона автоклавного твердения и включает арматурные стержни, образованные в основном из A) по меньшей мере одного волокнистого носителя и B) затвердевшей композиции, образованной из В1) по меньшей мере одного эпоксисоединения и В2) по меньшей мере одного диамина и/или полиамина, стехиометрическое отношение количества эпоксисоединения В1) к количеству диаминового и/или полиаминового компонента В2) составляет от 0,8:1 до 2:1, в качестве матричного материала, и C) необязательно дополнительных вспомогательных веществ и добавок. Способ изготовления указанного выше строительного блока включает помещение по меньшей мере одного арматурного стержня в форму, добавление раствора пенобетона и выдержку. Изобретение развито в зависимых пунктах формулы. Технический результат - улучшение термостойкости, физических ...

РАССЕЯНИЕ СВЕТА РЕГУЛИРУЕМОЙ ПОРИСТОСТЬЮ В ОПТИЧЕСКОЙ КЕРАМИКЕ ДЛЯ СВЕТОИЗЛУЧАЮЩИХ ДИОДОВ

Согласно изобретению предложен способ изготовления светоизлучающего устройства, включающий обеспечение суспензии, включающей в себя керамические частицы, по меньшей мере, одного материала, преобразующего длину волны, и полимерные частицы (301), имеющие диаметр от 2 до 10 мкм; образование керамического материала (300) из указанной суспензии; удаление указанных полимерных частиц (301) из указанного керамического материала (300) путем подвергания керамического материала термической обработке, заключающейся в разложении или окислении указанных полимерных частиц, чтобы обеспечить пористый керамический элемент (302), имеющий средний диаметр пор от 2 до 10 мкм; и установку указанного пористого керамического элемента (302), чтобы принимать свет от, по меньшей мере, одного светоизлучающего диода. Также предложен способ изготовления керамического элемента. Изобретение обеспечивает способ изготовления светоизлучающего устройства, которое предотвращает формирование желтого кольца вокруг устройства ...

НОВЫЕ ГЕОМЕТРИЧЕСКИЕ ФОРМЫ МНОГОКАНАЛЬНЫХ ТРУБЧАТЫХ ЭЛЕМЕНТОВ, ПРЕДНАЗНАЧЕННЫХ ДЛЯ ТАНГЕНЦИАЛЬНОЙ СЕПАРАЦИИ, СОДЕРЖАЩИХ ВСТРОЕННЫЕ УСИЛИТЕЛИ ТУРБУЛЕНТНОСТИ, И СПОСОБ ИХ ИЗГОТОВЛЕНИЯ

Изобретение относится к фильтрационным мембранам. Сепарационный элемент для тангенциальной сепарации обрабатываемой текучей среды на фильтрат и ретентат, при этом указанный сепарационный элемент содержит монолитную жесткую пористую основу прямолинейной структуры, в которой выполнены несколько каналов для протекания обрабатываемой текучей среды между входом и выходом для ретентата с целью сбора фильтрата от наружной поверхности основы, при этом монолитная жесткая пористая основа ограничивает препятствия, простирающиеся от внутренних стенок указанных каналов, для потока обрабатываемой текучей среды, которые характеризуются идентичностью материала и пористой текстуры с основой, а также непрерывностью материала и пористой текстуры с основой, при этом указанные препятствия создают вариации проходного сечения канала, когда варьирует по меньшей мере один из следующих критериев: площадь прямого сечения, форма прямого сечения, размеры прямого сечения канала. Технический результат – повышение эффективности ...

ТЕПЛОИЗОЛЯЦИОННЫЙ СТРОИТЕЛЬНЫЙ МАТЕРИАЛ И СПОСОБ ЕГО ПОЛУЧЕНИЯ

Теплоизоляционный строительный материал содержит минеральное связующее и наполнитель в виде замкнутых негорючих полых микросфер размером 15-100 мкм с нулевым водопоглощением со средним размером 50 мкм и с насыпной плотностью 0,35-0,45 г/см3, а также воду, причем минеральное связующее и наполнитель содержатся в количестве 34-38 и 16-20, соответственно, процентов к массе материала, а вода - остальное. Охарактеризован также способ получения теплоизоляционного материала. Технический результат: снижение расслаиваемости смеси, водопоглощения и теплопроводности получаемого материала, повышение его прочности при снижении удельного веса и морозостойкости, обеспечение экологической чистоты и негорючести получаемого материала, снижение себестоимости с одновременным расширением диапазона применения. 2 н. и 7 з.п. ф-лы.

Композиция для термостойкого пеноматериала

Изобретение относится к композициям для термостойких и высокопрочных пеноматериалов, которые могут быть использованы в качестве высокотемпературной теплоизоляции, работающей в окислительной среде. Описана композиция для термостойкого пеноматериала, включающая кремнийсодержащее связующее, полые керамические микросферы (ценосферы) и волокнистый наполнитель, в которой с целью повышения механической прочности и термостойкости пеноматериала, в качестве кремнийсодержащего связующего композиция содержит, мас. %: 10% раствор поликарбосилана в ксилоле, в качестве полых керамических микросфер - ценосферы, полученные флотационной обработкой дымовых выбросов теплоэлектростанции, работающих на твердом топливе, состав которых содержит SiO, AlO, CaO, MgO, NaO, FeO, в качестве волокнистого наполнителя - кварцевые волокна при следующем соотношении компонентов композиции, мас. %: указанное кремнийсодержащее связующее 13,0-76,9, полые керамические микросферы (ценосферы) 21,0-66,2, кварцевые волокна 2,1-20,8 ...

Способ изготовления заполнителя для бетона

Изобретение относится к области производства легких заполнителей для бетонов. В способе изготовления заполнителя для бетона, включающем подготовку массы на основе легкоплавких глин, способных вспучиваться в условиях термической обработки, ее увлажнение до 20-26%, формование гранул, сушку гранул до влажности 1-6%, обжиг гранул при температуре 900-1100°С, охлаждение гранул до температуры 20-50°С, для увлажнения используют суспензию, полученную разведением 1-2 мас.ч. легкоплавкой глины в 40-60 мас.ч. воды с последующим подогревом до температуры 60-80°С и вливанием в нее при постоянном перемешивании 1-2 мас.ч. расплавленного нефтяного битума/дегтя. Технический результат – интенсификация процесса обжига заполнителя. 2 пр.

Шихта с палладием для получения пористого проницаемого каталитического материала

Изобретение относится к шихте для получения пористого проницаемого каталитического материала методом самораспространяющегося высокотемпературного синтеза (СВС), который может быть использован для изготовления каталитических фильтров нейтрализаторов отработанных газов двигателей внутреннего сгорания, фильтрующих элементов, пламегасителей и аэраторов. Шихта содержит железную окалину, оксид хрома, хром, никель, алюминий, палладий и медь. Обеспечивается качественная каталитическая очистка отработанных газов двигателей внутреннего сгорания, а также обеспечивается повышение устойчивости к динамическим и статическим нагрузкам изделий, изготовленных на основе пористого проницаемого материала из упомянутой шихты. 1 табл., 1 пр.

СПОСОБ ПОЛУЧЕНИЯ КОНСТРУКЦИОННОГО КЕРАМЗИТОВОГО ГРАВИЯ

Изобретение относится к промышленности строительных материалов и может быть использовано для производства конструкционного керамзитового гравия повышенной прочности и облегченных конструкционных бетонов на его основе. Способ получения керамзитового гравия заключается в том, что подсушенные сырцовые гранулы подают во вращающуюся печь, подвергают гранулы в последовательно расположенных зонах печи сушке и обжигу при перемещении гранул от одного конца печи к другому и при росте температуры вдоль печи, и затем керамзитовые гранулы охлаждают, причем в первой зоне печи осуществляют сушку гранул при росте температуры до 450-500°C, во второй зоне осуществляют подготовительный обжиг при росте температуры от 500 до 1000°C и при скорости роста температуры большей, чем при сушке гранул, а в третьей зоне печи осуществляют окончательный обжиг при 1050-1100°C. Способ развит в зависимых пунктах формулы изобретения. Технический результат – получение конструкционного керамзитового гравия с твердой микропористой ...

Композиция для производства пористого заполнителя

Изобретение относится к области производства строительных материалов, в частности к производству пористых заполнителей на основе жидкого стекла, предназначенных для изготовления легких бетонов, а также теплоизоляционных засыпок. Композиция для производства пористого заполнителя включает, мас.%: натриевое жидкое стекло плотностью 1,41 г/см50-75, хлорид натрия, размолотый до размера менее 0,3 мм 1-3, горелые породы, размолотые до прохода через сито 0,14 мм 12-34, буровой шлам, размолотый до прохода через сито 0,14 мм и с содержанием оксидов, мас.%: SiO- 26,2; AlO- 4,5; FeO- 5,6; СаО - 28,3; MgO - 1,2; RO - 0,8; п.п.п. - 33,4, 10-15. Технический результат – повышение прочности при сжатии и коэффициента размягчения пористого заполнителя, утилизация промышленных отходов. 3 табл.

СПОСОБ ПОЛУЧЕНИЯ ГРАНУЛИРОВАННОГО СТРОИТЕЛЬНОГО МАТЕРИАЛА ИЗ ОТХОДОВ ПЕРЕРАБОТКИ АПАТИТО-НЕФЕЛИНОВЫХ РУД

Изобретение относится к области производства строительных материалов, в частности к производству искусственных пористых заполнителей для бетонов и гранулированных теплоизоляционных материалов для засыпной теплоизоляции, а также к получению полуфабриката для производства гранулированного строительного материала. Способ получения гранулированного строительного материала из сырьевой смеси, состоящей из кремнеземистого компонента и щелочного связующего раствора, включает сушку и помол кремнеземистого компонента, приготовление связующего раствора путем совместного мокрого помола стекловидного силиката натрия, карбоната натрия и воды при температуре 80-110°С в течение 10-180 мин, смешение компонентов и гранулирование смеси проводят в одном устройстве - грануляторе, после грануляции сырцовые гранулы подвергают термообработке: сушке до влажности 1-15% при температуре 200°С и обжигу в течение от 5 до 60 мин, в качестве кремнеземистого компонента используют отходы переработки апатито-нефелиновых ...

Шихта для производства заполнителя

Изобретение относится к производству заполнителей для бетонов. Шихта для производства заполнителя содержит, мас.%: глину монтмориллонитовую 97,8-98,4, монокальцийфосфат 0,2-0,4, молотый и просеянный через сито 0,14 волластонит 1,0-1,6, молотый и просеянный через сито 0,14 шунгит 0,2-0,4. Технический результат – повышение прочности заполнителя, полученного из шихты. 1 табл.

СПОСОБ ИЗГОТОВЛЕНИЯ ВЫСОКОПОРИСТОГО ДИОКСИДА ЦИРКОНИЯ

Изобретение относится к способам изготовления высокопористых керамических изделий и может быть использовано в машиностроении, химической промышленности и медицине для получения носителей катализаторов, фильтрующих элементов, биоимплантатов. Способ изготовления высокопористого диоксида циркония включает нанесение водной суспензии порошка на полимерную матрицу, сушку заготовки и спекание. Для приготовления суспензии используют нанопорошок диоксида циркония, который подвергают механической обработке в водном растворе полимера до образования агломератов частиц размером 1-10 мкм. После сушки заготовку выдерживают в течение не менее 24 ч в холодильной камере при температуре ниже 0°С. Спекание осуществляют при температуре 1300-1400°С. Обеспечивается получение высокопористого материала на основе диоксида циркония с пониженной температурой спекания без добавок активаторов спекания. 1 ил., 2 пр.

СПОСОБ ПОЛУЧЕНИЯ ТЕПЛОИЗОЛЯЦИОННОГО МАТЕРИАЛА

Изобретение относится к производству строительных материалов на основе жидкого стекла с использованием отхода производства - гальванического шлама и может быть применено в строительстве, машиностроении, транспорте и других отраслях промышленности. Способ получения теплоизоляционного материала включает перемешивание в шаровой мельнице мокрого помола смеси, состоящей из жидкого стекла плотностью 1,30-1,50 г/см3, раствора сульфата алюминия с концентрацией 24-26%, гальванического шлама с влажностью 65-70%, до образования однородной консистенции. Затем смесь загружают в формы и подвергают уплотнению на прессе. После формования изделия извлекают из форм и подвергают термообработке в печи в течение 20-30 мин при температуре 320-350°С, затем охлаждают. При этом компоненты используют при следующем соотношении, мас.%: жидкое стекло 20-24, раствор сульфата алюминия 20-24, гальванический шлам - остальное. Технический результат – упрощение способа получения теплоизоляционного материала, уменьшение длительности ...

ПОЛИМЕРНАЯ КОМПОЗИЦИЯ ДЛЯ ПОЛУЧЕНИЯ КАРБИДА КРЕМНИЯ

Изобретение относится к химической промышленности для получения термостойких высокопористых изделий из карбида кремния, которые используют в качестве фильтров, теплоизоляции, абсорбентов. Полимерная композиция для получения карбида кремния стехиометрического состава в виде готовых пористых изделий содержит порошкообразное фенольное связующее на основе новолачной фенолформальдегидной смолы и уротропина, смазку, в качестве которой используют стеарин или стеарат цинка, и носитель диоксида кремния, в качестве которого используют измельченные кварцевые волокна из промышленных отходов их производства, при следующем соотношении компонентов, мас.%: измельченные кварцевые волокна - 45,2-48,7; фенольное связующее - 46,1-52,0; смазка - 2,0-5,5. Изобретение обеспечивает расширение источников сырья для получения карбида кремния, повышение химической чистоты готового продукта, а также рациональное использование промышленных отходов производства кварцевого волокна. 1 табл., 5 пр.

ШИХТА ДЛЯ ПРОИЗВОДСТВА ПОРИСТОГО МАТЕРИАЛА "ПЕНОЗОЛ"

Изобретение относится к технологии строительных материалов, более конкретно к подготовке шихты для производства пористого материала и изделий на его основе для промышленной и строительной индустрии. Шихта для производства пористого материала содержит, мас.%: алюмосиликатную золу угольных ТЭС 78-92, порошкообразный карбид кремния фракции 0,1-300 мкм 0,1-0,8, порошкообразный стеклобой фракции 0,1-300 мкм - остальное. Технический результат - повышение прочности пористого материала, полученного из шихты, при одновременном снижении объемного веса и влагопроницаемости пористого материала. 1 ил., 1 пр.

Теплоизоляционный материал на основе пенополиуретана

Изобретение относится к производству строительных материалов, в частности теплоизоляционных материалов на основе пенополиуретана, и может быть использовано для теплоизоляции строительных конструкций различного назначения и для теплоизоляции трубопроводов. Теплоизоляционный материал на основе пенополиуретана, включающий пенополиуретан с наполнителем и полученный смешением полиизоционата с наполнителем с добавлением затем полиола с последующим перемешиванием до получения готового материала, где соотношение компонентов пенополиуретена полиизоционата и полиола составляет 1:1, а в качестве наполнителя используются отходы мокрой магнитной сепарации железистых кварцитов при следующем соотношении компонентов, мас.%: пенополиуретан - 60-80, отходы мокрой магнитной сепарации железистых кварцитов - 20-40. Технический результат - повышение прочности и теплостойкости, снижение теплопроводности и горючести. 2 табл.

Способ очистки сточных вод от ионов меди

Изобретение может быть использовано в водоочистке. Способ очистки сточных вод от ионов меди включает обработку сорбентом, в качестве которого используют изделия из ячеистого бетона автоклавного твердения плотностью 600 кг/м3 с размерами 30×30×30 мм. Очистку осуществляют путем отстаивания в течение 10 ч в присутствии готовых изделий. Изобретение позволяет уменьшить расход сорбента. 1 табл.

Способ получения теплоизоляционного материала на основе аэрогеля

Настоящее изобретение относится к технологиям с применением аэрогеля и может быть использовано для получения теплоизоляционных материалов широкого применения. Технический результат заключается в расширении области применения и получении теплоизоляционных материалов с относительно низким коэффициентом теплопроводности в широком диапазоне температур, улучшенными поглощающими свойствами электромагнитного излучения в области ИК-спектра, повышенной механической прочностью и гибкостью, сниженной осыпаемостью и достигается при получении материала путем изготовления упрочняющей структуры, в которую вводят аэрогель с последующей сушкой для получения целевого теплоизоляционного материала, причем упрочняющую структуру изготавливают в виде волокнистой подложки плотностью 0,001-0,1 г/см, которая состоит из волокон с диаметром 0,1-20 мкм, для получения аэрогеля предварительно получают золь путем смешивания силана с органическим растворителем и водным раствором кислоты с выдержкой мольного соотношения ...

ЖЕЛЕЗОБЕТОННОЕ ИЗДЕЛИЕ И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ

Группа изобретений относится к производству строительных материалов и может быть использовано для изготовления железобетонных шпал и брусьев. Железобетонное изделие получено из бетонной смеси, содержащей, мас.%: портландцемент 17,0-19,7, песок 20,4-30,0, щебень 42,0-52,8, пластификатор 0,05-0,16, добавку, регулирующую кинетику набора прочности, 0,50-0,56, воздухововлекающую добавку 0,04-0,12, воду – остальное. При этом пластификатор представляет собой водный раствор с плотностью 1240±30 кг/м3 на основе эфиров поликарбоксилата и/или полиарилата. Добавка, регулирующая кинетику набора прочности, представляет собой раствор плотностью 1240±30 кг/м3 на основе суспензии, содержащей синтетически полученные наночастицы кристаллического гидрата силиката кальция. Воздухововлекающая добавка представляет собой водный раствор плотностью 1020±20 кг/м3 на основе фумарированной канифоли. Способ изготовления железобетонного изделия включает установку в форму пакета арматурных стержней или проволоки, которые ...

ЗАЩИТА ПРОТИВ ОКИСЛЕНИЯ ИЗДЕЛИЙ ИЗ КОМПОЗИЦИОННОГО УГЛЕРОДОСОДЕРЖАЩЕГО МАТЕРИАЛА

... 1. Способ защиты от окисления детали, изготовленной из композиционного углеродсодержащего материала, имеющего открытые внутренние поры, включающий: ! импрегнирование детали жидкой импрегнирующей композицией, содержащей по меньшей мере одно соединение фосфатного типа, через посредство по меньшей мере части наружной поверхности детали; ! нанесение покрывающей композиции на указанную часть внешней поверхности детали, при этом покрывающая композиция содержит коллоидный раствор по меньшей мере одного огнеупорного оксида в воде, по меньшей мере одно соединение по существу боросиликатного типа в порошкообразной форме и обладающее свойствами залечивания, и по меньшей мере один борид металла в порошкообразной форме; и ! осуществление термической обработки после нанесения покрывающей композиции. ! 2. Способ по п.1, где коллоидный раствор является щелочным. ! 3. Способ по п.2, в котором используют коллоидный раствор, стабилизированный основным соединением. ! 4. Способ по любому из пп.1-3, где покрывающая ...

МАТРИЦА, СОБИРАЕМАЯ С ПОМОЩЬЮ МАКРОПОРИСТОГО ЗАТВЕРДЕВШЕГО ВЯЖУЩЕГО

... 1. Сборная керамическая матрица, содержащая элементы, плотно скрепленные друг с другом посредством стыка, причем стык и/или периферийное покрытие содержит затвердевшее вяжущее, имеющее в плоскости среза, перпендикулярной, по меньшей мере, к одной из находящихся напротив друг друга сторон элементов, собранных с помощью указанного стыка, поры с эквивалентным диаметром от 200 мкм до 40 мм, называемые ниже «макропорами», в таком количестве, чтобы в указанной плоскости среза суммарная площадь поверхность, занятая указанными макропорами, составляла более 15% и менее 80% наблюдаемой суммарной площади поверхности, причем более 50% макропор имеют эквивалентный диаметр от 500 мкм до 5 мм.2. Матрица по п.1, отличающаяся тем, что затвердевшее вяжущее содержит менее 10% неорганических волокон в мас.% от сухого минерального вещества.3. Матрица по п.1, отличающаяся тем, что затвердевшее вяжущее содержит органические волокна в количестве более 0,1% в мас.% от сухого минерального вещества.4. Матрица по ...

УСОВЕРШЕНСТВОВАННЫЙ СПОСОБ ПОЛУЧЕНИЯ ТЕРМОИЗОЛЯЦИОННОГО ПРОДУКТА ИЗ АЭРОГЕЛЯ ДИОКСИДА КРЕМНИЯ С ПОВЫШЕННОЙ ЭФФЕКТИВНОСТЬЮ

РАССЕЯНИЕ СВЕТА РЕГУЛИРУЕМОЙ ПОРИСТОСТЬЮ В ОПТИЧЕСКОЙ КЕРАМИКЕ ДЛЯ СВЕТОИЗЛУЧАЮЩИХ ДИОДОВ

... 1. Способ изготовления светоизлучающего устройства, включающий в себя: обеспечение суспензии, включающей в себя керамические частицы, по меньшей мере, одного материала, преобразующего длину волны, и полимерные частицы (301), имеющие диаметр от 2 до 10 мкм; ! образование керамического материала (300) из указанной суспензии; ! удаление указанных полимерных частиц (301) из указанного керамического материала (300) путем подвергания керамического тела термической обработке, заключающейся в разложении или окислении указанных полимерных частиц, чтобы обеспечить пористый керамический элемент (302), имеющий средний диаметр пор от 2 до 10 мкм; и ! установку указанного пористого керамического элемента (302), чтобы принимать свет от, по меньшей мере, одного светоизлучающего диода. ! 2. Способ по п.1, в котором указанные керамические частицы имеют средний размер частиц от 5 до 10 мкм. ! 3. Способ по п.1 или 2, в котором указанные полимерные частицы (301) имеют средний диаметр от 2 до 5 мкм. ! 4. Способ ...

АЭРОГЕЛИ, КАЛЬЦИНИРОВАННЫЕ ИЗДЕЛИЯ, ИЗДЕЛИЯ С КРИСТАЛЛИЧЕСКОЙ СТРУКТУРОЙ И СПОСОБЫ ИХ ПОЛУЧЕНИЯ

... 1. Монолитный аэрогель, содержащий органический материал и частицы кристаллического оксида металла, при этом количество частиц кристаллического оксида металла находится в диапазоне от 3 до 20 объемных процентов, исходя из общего объема монолитного аэрогеля, причем, по меньшей мере, 70 мольных процентов кристаллического оксида металла представляют собой ZrO.2. Монолитный аэрогель по п. 1, отличающийся тем, что частицы кристаллического оксида металла содержат в диапазоне от 1 до 15 мольных процентов кристаллического оксида металла, представляющего собой YO.3. Монолитный аэрогель по п. 1, отличающийся тем, что частицы кристаллического оксида металла содержат первое множество частиц, и второе, отличное от него, множество частиц.4. Способ получения не содержащего трещин кальцинированного изделия из оксида металла, имеющего x, y и z размеры, по меньшей мере, 5 мм, плотность в диапазоне от 30 до 95 процентов от теоретической плотности, и средний размер соединенных пор в диапазоне от 10 нм до 100 ...

Комплексный наномодификатор для газобетонов неавтоклавного твердения и содержащая указанную добавку газобетонная смесь

Изобретение относится к промышленности строительных материалов и может быть использовано для изготовления конструкционно-теплоизоляционных газобетонов неавтоклавного твердения различного назначения. Заявленный комплексный наномодификатор для газобетона неавтоклавного твердения на основе графеновых структур и лигносульфонатов содержит армирующую и структурообразующую добавку - водный раствор оксида графена и пластификатор - лигносульфонат натрия. При этом содержание компонентов составляет 0,00011 мас.% оксида графена и 0,08989 мас.% лигносульфоната натрия. Изобретение также относится к смеси для газобетона неавтоклавного твердения, содержащей заявленный комплексный наномодификатор. Изобретение позволяет повысить прочность газобетона на сжатие и изгиб, а также снизить его водопоглощение и теплопроводность. 2 н.п. ф-лы, 2 табл.

Способ получения спеченных пористых материалов на основе диборида металла

Purifying waste gas esp. filtration of carbon@ particles

In purification of waste gases, esp. filtration of C particles from exhaust gases from diesel engines and domestic heating plant, the waste gas is led through a filter material contg. 30-99.8 (50-95) wt.% of Al2O3 and 70-0.2% of SiO2, or SiO2 + ZrO2, where the amt. of ZrO2 is 0.05-75 wt.% of the sum of the amts. of SiO2 + ZrO2, and the density of the material is 0.01-1.5 g/cc (0.06-0.5 g/cc). After passing through the filter, the gas flows through a gas-permeable casing of SiO2 and Al2O3 surrounding it. Pref. the filter contains 20-100% (80-100%) of Al2O3 and SiO2, with 0-10 wt.% of alkali(ne earth) oxides, oxides of Ga, In, Tl, B, Ge, Sn, Pb, P, As, Sb, Bi, Se, or Te, or oxides of the Sub-Gps., esp. FeO, Fe2O3, Fe3O4, TiO2, Cr2O3 or oxides of Mn or the rare earths. The gas is led into a chamber which is open on the inlet side, closed on the outlet side, with a gas-permeable partition between inlet and outlet. The chamber contains a fibrous filter material, resistant to high temp. The surface ...

Poröser Keramikkörper und Verfahren zu seiner Herstellung

HEIZGERÄT MIT EINEM HOCHSTRAHLUNGSINTENSIVEN PORÖS KERAMISCHEN FLAMMENHALTER

Verfahren zur Herstellung von Metallcarbiden mit erhöhter spezifischer Oberfläche aus aktivierten Kohleschaumstoffen

VERFAHREN ZUR BESEITIGUNG VON STÖRUNGEN IN IMMUNOCHROMATOGRAPHISCHEN ASSAYS

Abgasschalldämpfer

Polymerisation von Cyclosiloxanen in Gegenwart von Füllstoffen

Hochtemperaturbeständige Faserverbundmaterialien und Verfahren zu deren Herstellung

Isolationsmaterial

Beschrieben werden ein Isolationsmaterial aus einer anorganischen, porösen Matrix, Verfahren zu dessen Herstellung und dessen Verwendung. Die daraus erhaltenen Formkörper und Beschichtungen zeigen eine ausgezeichnete Wärme- und Kälteisolation und sind über einen weiten Temperaturbereich einsetzbar.

Verfahren zur Herstellung poroeser Kunststeinmassen

Device used for manufacturing a metal-ceramic composite material comprises a casting flask, a casting chamber having an opening for the casting metal and the initial ceramic product, and a casting tool with a casting run and a die cavity

Device used for manufacturing a metal-ceramic composite material comprises a casting plunger (1), a casting chamber (2), and a casting tool (3) with a casting run (4) and a die cavity (5). The casting chamber has an opening (6) through which the casting metal and the initial ceramic product are poured. An Independent claim is also included for a process for manufacturing a metal-ceramic composite material comprising producing a preform from an initial ceramic product and infiltrating this under pressure with a casting metal in a casting tool. Preferred Features: A shooting head (7) for shooting in the initial ceramic product is placed on the opening so that it moves. A pouring channel (8) for pouring the casting metal is placed on the opening.

Vorrichtung zum Umhüllen von Stück- oder Packgut

The invention relates to a method for wrapping unit loads or packaged goods (2) using a section of elastic film (8) that is at least approximately hood-shaped, whereby the section of film is gathered and pulled over the unit load or packaged goods. The invention aims to provide a significantly faster packaging method of this type, which can be used in branches of industry with high production figures, e.g. white goods (dishwashers, refrigerators etc.). To achieve this, the section of film is gathered by a gathering device (3), then taken by a covering device (6)that can be displaced separately and subsequently pulled over the unit load or packaged goods, in particular being stretched beforehand. Another section of film can be gathered by the gathering device, while the previous section of film is still being pulled over the unit load or packaged goods.

Improved Manufacture of Articles of Ceramic Refractory Material.

... 14,235. Schwerin, Graf B. June 18. [Addition to 2626/11.] Pottery-materials; pottery.-Articles of ceramic refractory material are made from material not naturally plasic, other than corundum or carborundum, by working it in the colloidal condition, in the following manner. The material must be in very fine powder, made by grinding if necessary. It is suspended in water or other liquid, and if necessary an acid or base is added, according as the suspended material is electropositive or electronegative. Coarse particles or impurities are precipitated. The suspended material is next separated from the liquid either by deposition, which may be aided mechanically, or by electroosmotic methods, as described in Specifications 10,024/07 and 3364/11, [both in Class 41, Electrolysis]. The suspended material, mixed with water, is cast or moulded, and then dried and fired. The articles produced are porous or dense in accordance with the temperature at which they are fired.

CHROMIUM-BASED NITRIFIED BAKED MATERIAL AND METHOD OF OBTAINING IT

Process for producing shaped ceramic parts

POROUS CERAMIC BODY FORMED BY EXTRUSION PROCESS

A porous ceramic body is composed of filamentary ceramic material, formed by extrusion, and regularly or randomly layed into convolutions closely spaced, mutually contacting and bonded together at their contact points to constitute a self-supporting body having a stereo-reticulated porous structure. ...

Improvements in or relating to heat insulating materials

... 246,788. Deutsche Prioform Werke Bohlander & Co., Ges. Feb. 2, .1925, [Convention date]. Non-conducting coverings for heat. - A heatinsulating substance comprises a mixture of fibrous and pulverized materials which are of such fineness that the air-cells have a diameter of <1>/500 to <1> /10000 mm. The fine subdivision is obtained by carding, and the mixture may be subjected to pressure to reduce the size of the air cells. The materials may be cotton, silk, or slagwool, and soot, magnesia, or kieselguhr, and they may be employed in equal quantities by weight. The dimensions of the air cells are of the same order as the mean free path of the air molecules, which ensures a very low heat conductivity.

PROCESS OF FORMING A POROUS REFRACTORY MASS AND COMPOSITION OF MATTER FOR USE IN SUCH PROCESS

Structural cellular grout

Concrete

FABRICATION METHOD FOR MIXED OXIDE NUCLEAR FUEL

Improvements in or relating to cementitious material

A cementitious material comprises cellular granules of soluble anhydrite and/or calcium sulphate hemi-hydrate. An aggregate e.g. expanded perlite, exfoliated vermiculite, pumice, fly ash or their mixtures may be present, together with retarders and accelerators. The material is made by, in any order, comminuting, drying and calcining a foamed gypsum plaster, the calcining making the product cementitious. The foam may contain up to 3% of slaked or quick lime or up to 5% of Portland cement; up to 3% of alum, borax, calcium chloride, ammonium or aluminium sulphate, gum arabic, graphite, mica or sulphite lye or combinations thereof.

“New 4-benzoyl-isoxazole Derivatives, their process of production and weedkillers compositions the container”.

IMPROVED MULLIT BODIES AND PROCEDURE FOR YOUR PRODUCTION

PARTICLE FROM ORGANIC ACID AND FEOOH (FERROXANEN) AND CERAMIC(S) AND CERAMIC(S) DIAPHRAGMS DERIVED FROM FERROXANEN

POLYOLEFIN FOAM

PROCEDURE FOR IMPREGNATING POROUS ARTICLES

GESINTERTER NITRIERWERKSTOFF AUF DER BASIS VON CHROM UND VERFAHREN ZU DESSEN HERSTELLUNG

GROUPS OF CERAMIC HOLLOW FIBERS, PROCEDURES FOR THEIR PRODUCTION AND THEIR USE

GAS CATALYST WITH HONEYCOMBS WITH POROUS WALLS

PROCEDURE FOR BURNING FROM GREEN BODIES TO POROUS ONE CERAMIC(S) ARTICLES

MORE MULLITKÖRPER AND PROCEDURES FOR THE PRODUCTION OF MULLITKÖRPERN

BURNED, CERAMIC FIREPROOF PRODUCT

ANTI-OXIDATION PROTECTION OF ARTICLES FROM CARBON-CONTAINING COMPOSITE MATERIAL

SINTERED NITRATING MATERIAL ON THE BASIS FROM CHROME AND PROCEDURE TO ITS PRODUCTION

COMPOUND THIN FILM ELECTROLYTE

MOLDED ARTICLE OUT CORDIERIT

Stopfen in einem Zusammenwirken mit einer Bodenausgussdüse in einem metallurgischen Gefäß

Die Erfindung bezieht sich auf einen Stopfen (1) in einem Zusammenwirken mit einer Bodenausgussdüse (7) in einem metallurgischen Gefäß. Um bei einem Gießbetrieb eine Oxidbildung im Flüssigstahl und ein Anwachsen von Ansätzen am Feuerfestmaterial im Bereich der Durchflussregelung zu vermeiden, ist erfindungsgemäß vorgesehen, dass der Regelteil (3) des Stopfens (1), die ringförmige Regelfläche (31) einschließend, aus einem porösen gasdurchlässigen Feuerfestwerkstoff gebildet ist.

PROCEDURE FOR THE PRODUCTION OF A KOHLENSTOFFORMKÖRPERS WITH EXCELLENT COMPRESSION ELASTICITY.

SPUELSTEIN AND PROCEDURE FOR ITS PRODUCTION.

PROCEDURE FOR THE PRODUCTION OF GLASS OR CERAMIC BODIES.

USE OF SINTER-ABLE POWDERS FROM SILICON CARBIDE WITH A SPECIAL PARTICLE SIZE DISTRIBUTION FOR THE PRODUCTION OF POROUS OF CERAMIC FILTERELEMENTE AND SO MANUFACTURE CERAMIC PRODUCTS.

GAS-PERMEABLE POROUS BODY, ITS PRODUCTION AS WELL AS PRINTING MOLD.

PROCEDURE FOR THE PRODUCTION OF PORES CONTAINING SOLIDS FROM A MIXTURE OF BONDING AGENTS, AGGREGATES AND ADDITIVES.

PRESSLINGE ON BASIS ALUMINA, PROCEDURE FOR YOUR PRODUCTION, MANUFACTURED BY PYROGEN, AND YOUR USE.

PROCEDURE FOR THE PRODUCTION OF A POROUS SILICON CARBIDE BODY.

CERAMIC GATHERING MOLDS, YOUR PRODUCTION AND YOUR USES

PRODUCTION OF MG2-SI AND TERNARY CONNECTIONS MG2 (SI, E); (E=GE, SN, PB AS WELL AS TRANSITION METALS; SMALLER THAN 10 THREAD) FROM MGH2 AND SILICON AS WELL AS OF MAGNESIUMSILICIDFORMKÖRPERN MEANS PULSE PLASMA SYNTHESIS

CERAMIC DIAPHRAGM ON BASIS POLYMERODER NATURAL FIBERS OF AN EXHIBITING SUBSTRATE, PROCEDURE FOR THEIR PRODUCTION AND USE

PROCEDURE FOR THE PRODUCTION OF CERAMIC STONE MATERIALS WITH OPEN, GOING THROUGH POROSITAT

Carbon foam and manufacturing method therefor

Provided is a carbon foam having linear sections and bonding sections for bonding the linear sections, wherein the carbon foam is characterized by: the diameter of one of the linear sections being 0.1μm to 10.0μm; and having a surface with an area of at least 100cm ...

Anti-oxidation protection of pieces made from a composite material containing carbon

SILICON CARBIDE POROUS BODY, PROCESS FOR PRODUCING THE SAME AND HONEYCOMB STRUCTURE

4 BENZOYL ISOXAZOLE DERIVATIVES

Refractory articles

METHOD FOR PRODUCING POROUS CERAMIC ARTICLE

Rigid porous carbon structures, methods of making, methods of using and products containing same

NON-VITREOUS, NON-FUSED, MONOLITHIC CERAMIC FIBRES WITH POROUS OUTER LAYER AND NON-POROUS CORE

SILICA MOLDING AND PROCESS FOR ITS PRODUCTION

METHOD FOR THE ELIMINATION OF INTERFERENCES IN IMMUNOCHROMATOGRAPHIC ASSAYS

A method and device for carrying out immunoassays in which non analyte specific binding of heterophilic antibodies to a labeled antibody in a capture region produces an incorrect measure of the amount of an analyte attached to the antibody. Immunoglobulin from the same animal source as the labeled antibody is added to the sample fluid to prevent non-specific binding of the heterophilic antibodies in the capture region. One part of specific binding pair is added to said antibody or its label capable of binding to a second part of the binding pair immobilized in a control region downstream of said capture region for trapping the portion of the labeled anti-body which is not bound to the analyte. Preferably said binding pair is biotin/avidin or fluoroscein/anti-fluoroscein.

INORGANIC FIBER SUBSTRATES FOR EXHAUST SYSTEMS AND METHODS OF MAKING SAME

A method for rigidifying a fiber-based paper substrate for use in the exhaust system of a combustion device. In the method, a green ceramic fiber-based paper substrate is impregnated with an impregnating dispersion. The impregnated substrate is then dried, calcined and fired to form a rigidified substrate that is suitable for use in the exhaust system of a combustion device. This rigidification process is performed at least once and, preferably, two or more times. The green paper substrate comprises two or more sheets of green ceramic fiber-based paper, with at least one creased sheet and another sheet being a laminated together to form a plurality of tubular channels. The rigidified substrate comprises refractory ceramic fibers in the form of a ceramic fiber-based paper and agglomerates of ceramic particles. The ceramic particle agglomerates are bonded to and disposed so as to thereby bond together the refractory ceramic fibers at spaced locations along and at intersections of the refractory ...

METHOD FOR MAKING A SIC BASED CERAMIC POROUS BODY

L'invention se rapporte à un procédé de fabrication d'un produit céramiqu e réfractaire poreux à base de SiC, par cuisson et frittage à haute températ ure, à partir d'une fraction de particules fines de SiC et d'une fraction de particules de plus grande taille de SiC, ledit procédé étant caractérisé en ce que, dans une étape préalable à la cuisson et au frittage à haute tempér ature, les plus fines particules de SiC sont agglomérées, puis dans une deux ième étape, les granules ainsi obtenus sont ajoutés à la poudre de SiC prése ntant des particules de plus grande taille. L' invention se rapporte égaleme nt à un corps poreux en SiC recristallisé sous forme essentiellement CC, en particulier filtre à particules pour application automobile, obtenu par un t el procédé.

MOLDED SINTERED BODY, AND METHOD FOR PRODUCING MOLDED SINTERED BODY

Provided is a molded sintered body containing a mayenite-type compound, an inorganic binder sintered product, and a transition metal, wherein the content of the inorganic binder sintered product is 3-30 parts by mass with respect to 100 parts by mass of the molded sintered body, and in the pore diameter distribution of the molded sintered body obtained by measuring the pore diameter distribution by means of the nitrogen adsorption method, the molded sintered body has at least one pore peak in the pore diameter range of 2.5-20 nm and 20-350 nm, respectively. Also provided is a method for producing a molded sintered body, the method comprising: a step for mixing a precursor of a mayenite-type compound and a raw material of an inorganic binder sintered product and producing a mixture; a step for molding the mixture and producing a molded body of the mixture; a step for firing the molded body and producing a fired product; and a step for supporting a transition metal onto the fired product ...

CERAMIC ARTICLES HAVING A NONPOROUS CORE AND POROUS OUTER LAYER

This invention relates to high technology ceramics. The ceramic articles of this invention are fired, non-vitreous, monolithic, non-fused ceramic articles in various forms. Articles capable of being filled or infiltrated with certain substances in a controlled geometry and in controlled amounts to render the articles useful for special applications, e.g., catalytic, reinforcing, are rare. The articles of this invention exhibit a uniform, porous sheath and a core. The porous sheath or outer layer of the articles can be filled with various infiltrates, e.g., catalysts, in order to provide the articles with useful properties. The articles can be prepared by treating fired ceramic articles with a leachant, e.g, hydrofluoric acid or a precursor thereof.

SHAPED ARTICLES OF SILICATE MATERIAL, A PROCESS FOR THEIR PRODUCTION AND THEIR USE

... of the disclosure: HOE 84/F 257 A process for the production of shaped articles from silicate material by extrusion and/or pelleting and subsequent annealing is described. In this process, pulverulent layered silicic acids of the general formula HZSiyOZy+1, in which y is a number from 1.7 to 24, or salts thereof, in which all or some of the H is replaced by at least one cation from the group comprising Li+, Na+, K+, NH4+, Ca2+, Cu2+, Co2+, Ni2+ and Mg2+, are mixed with water or an organic solvent, the mixture is extruded and/or pelleted to give roll-shaped or tube-shaped pieces and these are then dried and annealed under conditions such that the starting material is chiefly converted into cristobalite and/or tridymite. The same material can also be pressed in a molding tool under pressure. Under these conditions, shaped articles which predominantly consist of cristobalite or tridymite and have a Shore hardness of at least 70 can be obtained.

MULTILAYER FUEL CELL ELECTRODE SUBSTRATE HAVING ELONGATED HOLES FOR FEEDING REACTANT GASES

TITLE OF THE INVENTION: MULTILAYER FUEL CELL ELECTRODE SUBSTRATE HAVING ELONGATED HOLES FOR FEEDING REACTANT GASES A carbonaceous multilayer electrode substrate for a fuel cell disclosed herein has elongated holes for feeding reactant gases to the fuel cell. The electrode substrate comprises at least one porous carbonaceous layer having such holes. An electrode substrate of the invention comprises such a porous layer and a dense layer capable of effecting a function as a separator sheet. An another substrate of the invention comprises a dense layer and two such porous layers on both surfaces of the dense layer. A still another substrate comprises an extended dense layer and two such porous layers on both surfaces of the dense layer.

FABRICATION OF CERAMIC HEAT PIPES

A method of forming a porous capillary layer of a metal oxide ceramic material onto a metal oxide ceramic substrate, which comprises covering the surface of the substrate with an aqueous slurry of a powdered mixture comprising the metal oxide of the ceramic substrate, silica and an alkali metal or alkalineearth metal oxide, the powder mixture having a maximum particle size of about 44 microns, removing excess of slurry, depositing onto the wet surface a layer of granular ceramic material having a particle size of about 250 to about 500 microns, the granular ceramic material being applied in excess relative to the powder of the aqueous slurry to insure that a porous capillary structure will be obtained and causing the slurry to be drawn up between the particles so as to absorb substantially all the slurry, and firing the coated surface at a temperature to effect bonding of the ceramic layer, the powdered constituents of the mixture being proportioned to provide liquid phases at about 200 ...

ELASTIC INORGANIC FOAM

The invention relates to an open-cell, inorganic, aluminosilicate-based foam with a density of less than 25 g/l. The invention also relates to a method for producing said foam by reacting and expanding an alkali metal silicate solution with an alkali metal aluminate solution, in the presence of a volatile expanding agent and an emulsifier.

Acid-lead battery electrode comprising a network of pores passing therethrough, and production method

A structure including a network of parallel, homogeneous pores extending through the structure, and an outer frame around the lateral faces of the structure. The structure and the frame are made of carbon. The electrode is covered by a layer based on lead. The pores are filled with an active material based on lead.

Method and apparatus associated with anisotropic shrink in sintered ceramic items

A manufacturing method for producing ceramic item from a photocurable ceramic filled material by stereolithography. The method compensates for the anisotropic shrinkage of the item during firing to produce a dimensionally accurate item.

Ceramic honeycomb structure and its production method

A ceramic honeycomb structure having a large number of flow paths defined by porous cell walls; said porous cell walls being composed of cordierite crystals, mullite crystals, corundum crystals and/or spinel crystals; the percentage of the X-ray diffraction intensity of the cordierite crystals being 72% or more and less than 85%, the percentage of the X-ray diffraction intensity of the mullite crystals being 15-25%, and the percentage of the total X-ray diffraction intensity of the corundum crystals and the spinel crystals being 5% or less, per the total X-ray diffraction intensity of these crystals; said porous cell walls having a true density of 2.55-2.70 g/cm 3 , a mean pore diameter of 10-20 μm, and a porosity of 50-65%; the volume of pores having diameters exceeding 50 μm being 8-25% of the total pore volume, the volume of pores having diameters of less than 10 μm being 16-25% of the total pore volume, and the pore diameter distribution deviation σ being 0.5 or less.

Ceramics manufacture using rapidly hydratable cellulosic binder

A method for making a ceramic body, the method including: mixing inorganic ceramic-forming ingredients to form a batch; adding a rapidly hydratable cellulosic binder and a liquid vehicle to the batch and further mixing to form a plasticized mixture; extruding the plasticized mixture to form a green body. The green body can then be heated sufficiently to produce a predominant ceramic phase, thereby transforming the green body into the ceramic body.

Process And Apparatus For Manufacturing Ceramic Honeycombs

Methods and apparatus for making ceramic honeycombs by steps including compounding a plasticized ceramic batch mixture and forming the mixture into ceramic honeycombs by continuous extrusion, drying and firing, wherein one or more ceramic powders for the batch mixture are supplied by in-line homogenization as a powder feed having a median particle size D 50 that varies from a maximum value to a minimum value by an amount not exceeding 15% of the maximum value during a 24-hour period of continuous extrusion.

Composite Tooling

A carbon foam article useful for, inter alia, composite tooling or other high temperature applications, which includes a substrate, wherein the substrate includes at least one material selected from carbon foam, extruded graphite, graphite foam, and isomolded graphite. The tool may also include a skin as a working surface and a filler disposed below the skin. The tool has a surface roughness of no more than about 63 micro-inches. Such a tool may be used to make a composite prototype part.

Oxidation catalyst

An oxidation catalyst comprises an extruded solid body comprising: 10-95% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least one precious metal and optionally at least one non-precious metal, wherein: (i) a majority of the at least one precious metal is located at a surface of the extruded solid body; (ii) the at least one precious metal is carried in one or more coating layer(s) on a surface; (iii) at least one metal is present throughout the extruded solid body and in a higher concentration at a surface; (iv) at least one metal is present throughout the extruded solid body and in a coating layer(s) on a surface; or (v) a combination of (ii) and (iii).

Systems and processes for combining different types of seeds

A process and system are provided for preparing seed mixes having a target quantity and a target ratio of different types of seeds. The process generally includes portioning quantities of different types of seeds from bulk supplies of the seeds, and combining the portioned quantities of seeds to prepare the seed mixes. The system generally includes first and second dispensing assemblies for portioning the quantities of the different types of seeds from the bulk supplies, and a mixing assembly for receiving the portioned quantities of seeds as the seed mixes. The combined quantities of the different types of seeds in the seed mixes are substantially equal to the target quantity, and a ratio of the quantities of the different types of seeds is substantially equal to the target ratio.

Ceramic membranes

Processes for fabricating ceramic membranes include providing a porous substrate having at least one inner channel extending therethrough and having surfaces defined by porous walls, depositing a coating slurry on surfaces of the inner channel(s), and sintering. Sintering temperatures for the processes range from about 400° C. to 800° C. Coating slurries for use in the processes include a boehmite sol and a colloidal suspension of porous alumina particles.

Self-Toughened High-Strength Proppant and Methods Of Making Same

Methods are described to make strong, tough, and lightweight whisker-reinforced glass-ceramic composites through a self-toughening structure generated by viscous reaction sintering of a complex mixture of oxides. The present invention further relates to strong, tough, and lightweight glass-ceramic composites that can be used as proppants and for other uses.

Low expansion corrosion resistant ceramic foam filters for molten aluminum filtration

A ceramic foam filter for molten aluminum alloys comprising an alumina silicate rich core and a boron glass shell and a chemical composition comprising: 20-70 wt % Al 2 O 3 , 20-60 wt % SiO 2 , 0-10 wt % CaO, 0-10 wt %; MgO and 2-20 wt % B 2 O 3 .

Modified polylactic acid, polymeric blends and methods of making the same

Polymeric compositions and processes of forming the same are discussed herein. The processes generally include contacting a polylactic acid with a reactive modifier selected from epoxy-functionalized polybutadiene, ionic monomer, and combinations thereof.

Honeycomb structure and method of manufacturing honeycomb structure

A honeycomb structure includes a substantially pillar-shaped honeycomb unit having cells defined by cell walls. The cell walls include silicon carbide particles having a nitrogen-containing layer provided on surfaces of the silicon carbide particles. A method of manufacturing a honeycomb structure includes preparing paste containing silicon carbide particles. The paste is molded to form a honeycomb molded body. The honeycomb molded body is fired in an inert atmosphere containing no nitrogen to obtain a substantially pillar-shaped honeycomb unit having cells defined by cell walls. The honeycomb unit is heated in an environment containing nitrogen to provide a nitrogen-containing layer on surfaces of the silicon carbide particles forming the cell walls.

Ceramic Honeycomb Structure Skin Coating

A porous ceramic (honeycomb) structure skin coating and a method of producing a porous ceramic structure skin coating which provides a hardshell, strong, acid- and alkali-resistant, chip-resistant ceramic honeycomb structure coating which resists pollution control catalyst from being absorbed into the skin coating.

Composite Material of Electroconductor Having Controlled Coefficient of Thermical Expansion

The present invention relates to a composite material comprising a ceramic component, characterized in that it has a negative coefficient of thermal expansion, and carbon nanofilaments, to its obtainment process and to its uses as electrical conductor in microelectronics, precision optics, aeronautics and aerospace.

Process for producing ceramics fired body

The present invention aims to provide a process for producing a fired body with a high linear shrinkage ratio during firing (firing shrinkage ratio) without a damage of the shape of the shaped body, such as the honeycomb structure. The present invention is a process for producing a ceramics fired body comprising a step of firing a shaped body, wherein a linear shrinkage ratio in dimension of the fired body to the shaped body (the linear shrinkage ratio (%)=(dimension of the shaped body−dimension of the fired body)/(dimension of the shaped body)×100) is not lower than 1% and the shaped body is fired while being disposed on a mat made of a ceramics having a high thermal conductivity.

Honeycomb structure comprising an outer cement skin and a cement therefor

Disclosed is a honeycomb catalyst support structure comprising a honeycomb body and an outer layer or skin formed of a cement comprising an amorphous glass powder with a multimodal particle size distribution applied to an exterior surface of the honeycomb body. The multimodal particle size distribution is achieved through the use of a first glass powder having a first median particle size and at least a second glass powder having a second median particle size. In some embodiments, the first and second glass powders are the same amorphous glass consisting of fused silica. The cement may further include a fine-grained, sub-micron sized silica in the form of colloidal silica. The cement exhibits a coefficient of thermal expansion less than 15×10 −7 /° C., and preferably about 5×10 −7 /° C. after drying.

Alpha-alumina inorganic membrane support and method of making the same

Compositions for making alpha-alumina supports for, for example, inorganic membranes are described. Methods for controlling the alumina and pore former particle sizes and other process variables are described which facilitate desirable porosity, pore distribution and strength characteristics of the resulting alpha-alumina inorganic membrane supports.

Ceramic compositions for reduced plug rate

A precursor batch composition that can be used to make porous ceramic articles is provided. The batch composition includes a cellulose-based polymer and, in particular, a methylcellulose having a number average molecular weight (M n ) from about 120,000 to about 170,000 grams per mole and showing a specified micro-calorimetry thermal response fingerprint.

Porous, low density nanoclay composite

Disclosed are porous, low density nanoclay composites that exhibit highly homogeneous microcellular morphology and methods for forming the nanocomposites. The nanocomposites include a three-dimensional matrix having a non-lamellar, generally isotropic cellular structure with little or no macroscopic pores. The nanocomposites also include a gel that may be a noncovalently cross-linked, thermoreversible gel. The nanocomposites may include a binder and/or fibrous reinforcement materials. The nanocomposites may be formed according to a freeze-drying process in which ice crystal growth is controlled to prevent formation of macroscopic pores in the composite materials.

Filtering structure, including plugging material

Filter structure of the honeycomb type for filtering particulate-laden gases, said structure being characterized in that: a) the filtering walls of said honeycomb structure are made of a material having, after firing, an average thermal expansion coefficient, measured between 25 and 1100° C., of less than 2.5×10 −6 K −1 ; and b)the material constituting the plugs comprises: a filler formed from refractory grains, the melting temperature of which is above 1500° C., and the median diameter of which is between 5 and 50 microns; and a glassy binder phase.

Templated growth of porous or non-porous castings

A method of forming a templated casting involves incorporating a liquid feedstock into the channels of a honeycomb substrate to form a feedstock-laden substrate, and directionally solidifying the liquid feedstock within the channels.

Ceramic honeycomb filter and its production method

A ceramic honeycomb filter comprising a ceramic honeycomb structure having large numbers of flow paths partitioned by porous cell walls, and plugs disposed in the flow paths alternately on the exhaust gas inlet or outlet side, to remove particulate matter from an exhaust gas passing through the porous cell walls; the porous cell walls having porosity of 45-75%, the median pore diameter A (μm) of the cell walls measured by mercury porosimetry, and the median pore diameter B (μm) of the cell walls measured by a bubble point method meeting the formula of 35<(A−B)/B×100≦70, and the maximum pore diameter of the cell walls measured by a bubble point method being 100 μm or less.

Process for production of honeycomb structure, honeycomb structure, and particulate filter

A method of manufacturing a honeycomb structure comprises a step of forming a molded article by molding a raw material containing a ceramic powder and a pore-forming agent; and a step of manufacturing a honeycomb structure by sintering the molded article, wherein the pore-forming agent is powder formed of a material that disappears at a sintering temperature or less where the molded article is sintered, the powder is obtained by mixing a small particle size powder and a large particle size powder, a median particle size of which a ratio of a cumulative mass with respect to a total mass of the small particle size powder is 50% is 5 to 20 μm, a median particle size of which a ratio of a cumulative mass with respect to a total mass of the large particle size powder is 50% is 30 μm or more, and a ninety-percentage particle size of which a ratio of a cumulative mass with respect to a total mass of the large particle size powder is 90% is 80 μm or less.

High temperature refractory coatings for ceramic substrates

A method of manufacturing a composite article includes pyrolyzing a preceramic polymer to form a non-oxide ceramic matrix and a byproduct, and reacting the refractory material with the byproduct to form a refractory phase within the non-oxide ceramic matrix.

TUBULAR PORE MATERIAL

Product formed from a ceramic material, at least part of the said product not being formed from amorphous silica and including pores and satisfying the following criteria (a), (b) and (c): (a) at least 70% by number of the said pores are frustoconical tubular pores extending substantially parallel to each other in a longitudinal direction; (b) in at least one cross-section plane, the mean size of the cross sections of the said pores is greater than 0.15 μm and less than 300 μm; (c) in at least one cross-section plane, at least 50% by number of the pores have a convexity index Ic of greater than 87%, the convexity index of a pore being equal to the ratio Sp/Sc of the surfaces Sp and Sc delimited by the perimeter and by the convex envelope of the said pore, respectively. 1. Product formed from a ceramic material , at least part of the said product not being formed from amorphous silica and comprising pores and satisfying the following criteria (a) , (b) and (c):(a) at least 70% by number of the said pores are frustoconical tubular pores extending substantially parallel to each other in a longitudinal direction;(b) in at least one cross-section plane, the mean size of the cross sections of the said pores is greater than 0.15 μm and less than 300 μm;(c) in at least one cross-section plane, at least 50% by number of the pores have a convexity index Ic of greater than 87%, the convexity index of a pore being equal to the ratio of Sp/Sc of the surface areas Sp and Sc delimited by the perimeter and by the convex envelope of the said pore, respectively.2. Product according to claim 1 , the ceramic material being chosen from the group formed by zirconium oxide claim 1 , partially stabilized zirconium oxide claim 1 , stabilized zirconium oxide claim 1 , yttrium oxide claim 1 , doped yttrium oxide claim 1 , titanium oxide claim 1 , aluminosilicates claim 1 , cordierite claim 1 , aluminium oxide claim 1 , hydrated aluminas claim 1 , magnesium oxide claim 1 , talc claim 1 , ...

Cold set composition for ceramic bodies

Disclosed are ceramic articles comprising ceramic honeycomb bodies and an aqueous composition, for example in the form of a cold-set plug, as well as processes for preparing ceramic articles and processes for making an aqueous composition for use with ceramic articles, for example as a cold-set plug composition.

METHOD FOR APPLYING DISCRIMINATING LAYER ONTO POROUS CERAMIC FILTERS VIA GAS-BORNE PREFABRICATED POROUS ASSEMBLIES

A porous discriminating layer is formed on a ceramic support having at least one porous wall by (a) establishing a flow of a gas stream containing highly porous particles through the support to deposit a layer of the highly porous particles of a ceramic or ceramic precursor onto wall(s) of the support and (b) calcining said deposited layer to form the discriminating layer. This method is an inexpensive and effective route to forming a discriminating layer onto the porous wall. 1. A method of forming a porous discriminating layer on a ceramic support having at least one porous wall comprising (a) establishing a flow of a gas stream containing entrained high porosity particles of a ceramic or ceramic precursor through said at least one porous wall from a gas entry side of said at least one porous wall to a gas outlet side of said at least one porous wall , such that at least a portion of the high porosity particles deposit to form a deposited layer of high porosity particles on the gas entry side of said at least one porous wall , wherein (1) the high porosity particles contain ceramic fibers having a diameter of from 1 nanometer to 5 microns that are bonded together at points of contact or entangled together and have a largest dimension from 10 to 500 microns , (2) the high porosity particles have a porosity of at least 50 volume-% and an apparent volume average pore diameter , as measured by mercury porosimetry , of no greater than 10 microns and (3) said deposited layer extends only partially through the thickness of said at least one porous wall and (b) calcining said deposited layer to form the porous discriminating layer.2. (canceled)3. The method of wherein the high porosity particles have a porosity of at least 70 volume-% and an apparent volume average pore diameter of from 0.05 to 5 microns.4. The method of wherein the deposited layer is at least 10 microns thick.5. The method of wherein the deposited layer is from 25 to 75 microns thick.6. The method of ...

METHOD FOR APPLYING DISCRIMINATING LAYER ONTO POROUS CERAMIC FILTERS

A porous discriminating layer is formed on a ceramic support having at least one porous wall by (a) establishing a flow of a gas stream containing agglomerates of particles and (b) calcining said deposited layer to form the discriminating layer. At least a portion of the particles are of a sinter-resistant material or a sinter-resistant material precursor. The particles have a size from 0.01 to 5 microns and the agglomerates have a size of from 10 to 200 microns. This method is an inexpensive and effective route to forming a discriminating layer onto the porous wall. 1. A method of forming a porous discriminating layer on a ceramic support having at least one porous wall comprising (a) establishing a flow of a gas stream containing particle agglomerates through said at least one porous wall from a gas entry side of said at least one porous wall to a gas outlet side of said at least one porous wall , such that at least a portion of the agglomerates deposit to form a deposited layer of the agglomerates , their constituent particles or both on the gas entry side of said at least one porous wall , wherein (1) at least a portion of the particles that make up the particle agglomerates are of a ceramic material or precursor to a ceramic material , (2) the particles that make up the particle agglomerates have a size from 0.01 to 5 microns (μm) , (3) the agglomerates have a size of from 10 to 200 microns and (4) said deposited layer extends only partially through the thickness of said at least one porous wall and (b) calcining said deposited layer to form the discriminating layer.2. The method of wherein the particle agglomerates include particles of a mullite precursor and claim 1 , during step (b) claim 1 , the mullite precursor particles form mullite.3. The method of claim 1 , wherein the support is acicular mullite.4. The method of wherein the particle agglomerates include particles of at least one functional material.5. The method of wherein the functional material is a ...

BETA-SPODUMENE-CORDIERITE COMPOSITION, ARTICLE, AND METHOD

Porous spodumene-cordierite honeycomb bodies of high strength but low volumetric density, useful for the manufacture of close-coupled engine exhaust converters, gasoline engine particulate exhaust filters, and NOx integrated engine exhaust filters, are provided through the reactive sintering of batches comprising sources of magnesia, alumina and silica together with a lithia source, such as a spodumene or petalite ore. 1. A method for making a porous ceramic article comprising the steps of:mixing inorganic batch ingredients with a liquid and an organic binder to form a plasticized batch mixture, the inorganic batch ingredients comprising sources of magnesia, silica, alumina and lithia, wherein the lithia source comprises one or more lithium-containing compounds, wherein the magnesia source comprises one or more magnesium-containing compounds, and wherein the magnesia source constitutes less than 25 wt % of the inorganic batch ingredients;forming the plasticized batch mixture into a green body; andheating the green body to a top temperature of 1180 to 1260° C. for a time sufficient to convert the green body into the porous ceramic article, the article being comprised of a principal phase of beta-spodumene and a minor phase of cordierite.2. The method of wherein the beta-spodumene and cordierite phases together constitute more than 80% of the porous ceramic article.3. The method of wherein the porous ceramic article contains less than 4 wt % glass.4. The method of wherein the lithia source is selected from the group consisting of spodumene claim 1 , petalite claim 1 , and combinations thereof.5. The method of wherein the magnesia source is selected from the group consisting of MgO claim 1 , magnesium hydroxide claim 1 , talc claim 1 , and combinations thereof.6. The method of wherein the plasticized batch mixture further comprises a pore forming agent.7. The method of wherein the inorganic batch ingredients comprise α-spodumene in an amount of at least 40 wt % with ...

PERMEABLE MATERIAL, ARTICLES MADE THEREFROM AND METHOD OF MANUFACTURE

The invention is directed to a honeycomb comprising cordierite and β-spudomene, the honeycomb having a having total porosity of greater than 30% and a mean pore diameter of less than 5 μm. The honeycomb is made from a mixture of activated kaolin and a mineral selected from the group consisting of lithium fluorhectorite, lithium hydroxyhectorite and mixtures thereof. In one embodiment up to 20 wt % weight SiO, based on the total weight of the kaolin and minerals (fluorhectorite, hydroxyhectorite) is added and mixed therein prior to the formation of the green body. In another embodiment the amount of added SiOis up to 10 wt %. In one embodiment the total porosity is greater than 50% and the mean pore diameter is less than 5 μm. 1. A honeycomb comprising cordierite and β-spodumene , said honeycomb having a total porosity greater than 30% and a mean pore diameter of less than 5 μm.2. The honeycomb according to claim 1 , wherein the porosity is greater than 40%.3. The honeycomb according to claim 1 , wherein the porosity is greater than 50%.4. The honeycomb according to claim 1 , wherein said honeycomb has a CTE of less than 25×10/° C. over the temperature range of 22-1000° C.5. The honeycomb according to claim 3 , wherein said honeycomb has a CTE of less than 25×10/° C. over the temperature range of 22-1000° C.6. The honeycomb according to claim 1 , wherein the honeycomb has a CTE of less then 15×10/° C. over the temperature range of 22-1000° C.7. The honeycomb according to claim 3 , wherein the honeycomb has a CTE of less then 15×10/° C. over the temperature range of 22-1000° C.8. A particulate filter comprising cordierite and β-spodumene claim 3 , said particulate filter having a total porosity greater than 30% claim 3 , and a mean pore diameter of less than 5 μm.9. The particulate filter according to claim 8 , wherein the porosity is greater than 50%.10. The particulate filter according to claim 8 , wherein the particulate filter has a CTE of less then 15×10/° C. ...

SYSTEM, METHOD AND APPARATUS FOR ENTRAINING AIR IN CONCRETE

A method of preparing a concrete composition for downhole injection includes utilizing a controller to control a process including circulating process water in a process water supply loop for a predetermined period while monitoring and controlling the temperature and flow rate of the process water, circulating aqueous-based air entrainment solution in an aqueous-based air entrainment solution supply loop for the predetermined period and controlling the flow rate of the aqueous-based air entrainment solution and after the predetermined period of time in which the flow of process water and aqueous-based air entrainment solution have stabilized, simultaneously actuating valves to divert and mix the process water, the aqueous-based air entrainment solution and compressed air to produce an air-entrained foam and mixing the foam with a concrete composition to be deployed downhole. 1. A system for making stable cement slurry for downhole injection , comprising:a controller for controlling the system, the controller including one or more communications interfaces for communicating with system components and a data storage device for storing predetermined process parameters;a process water supply circuit for providing temperature controlled process water for producing an air-entrained foam, including:a process water supply tank having a temperature monitoring device and a level detecting device, the temperature monitoring device and level detecting device providing signals to the controller indicating the level of process water in the water supply tank and the temperature of the process water in the process water supply tank;a closed loop circulating system for controlling the temperature of the water in the process water supply tank including a circulating pump, a water heater and/or a water cooler, the circulating pump pumping water from the process water supply tank through the water heater and/or water cooler and back to the process water supply tank to control the ...

METHOD FOR PREPARING POROUS NANSTRUCTURED CERAMIC BILAYERS, CERAMIC BILAYERS OBTAINED BY SAID METHOD AND USES OF SAME

A method is provided for preparing porous nanostructured ceramic bilayers resting on a substrate, to the bilayers obtained by the method, and to the various uses of same, in particular in micro and nanofluidics, optics, photocatalysis and for separating and detecting analytes or molecules of interest. The method includes: ) a first step of forming a supported polymer cavity having oriented cylindrical porosity; ) a second step of filling and covering the polymer cavity with a solution or a dispersion of at least one ceramic precursor, optionally functionalised, in an organic solvent; ) a third step of eliminating the polymer cavity used in step ) by thermal treatment. 1. A method for preparing a nanostructured porous ceramic bilayer supported on a substrate , said bilayer having a lower layer in contact with the substrate and formed of ceramic pillars , said lower layer having a completely interconnected porosity of greater than 50% by volume , and a continuous upper ceramic layer resting on the lower layer of ceramic pillars , said upper layer having a volume porosity lower than the volume porosity of the lower layer , said method comprising the steps of:A) a first step of forming, via a liquid route, a supported polymer template having an oriented cylindrical porosity, said first step comprising the following substeps:i) the formation of a polymer film by application, to the surface of a substrate, of a block copolymer selected from the group consisting of the copolymers formed from polystyrene and sacrificial blocks selected from the group consisting of polyoxyethylene, polylactide and polybutadiene blocks and wherein the volume fraction of the sacrificial blocks varies from 0.20 to 0.40, in solution in an organic solvent;ii) the orientation of the sacrificial blocks along an axis substantially perpendicular to the surface of the substrate, by exposure of said polymer film to a heat treatment or to organic solvent vapors;iii) the immobilization of said polymer ...

NARROW PSD HYDRAULIC CEMENT, CEMENT-SCM BLENDS, AND METHODS FOR MAKING SAME

Hydraulic cements, such as Portland cements and other cements that include substantial quantities of tricalcium silicate (CS), dicalcium silicate (CS), tricalcium aluminate (CA), and/or tetracalcalcium alumino-ferrite (CAF), are particle size optimized to have increased reactivity compared to cements of similar chemistry and/or decreased water demand compared to cements of similar fineness. Increasing hydraulic cement reactivity increases early strength development and release of reactive calcium hydroxide, both of which enhance SCM replacement and 1-28 day strengths compared to blends of conventional Portland cement and one or more SCMs, such as coal ash, slag or natural pozzolan. Decreasing the water demand can improve strength by decreasing the water-to-cement ratio for a given workability. The narrow PSD cements are well suited for making blended cements, including binary, ternary and quaternary blends. 1. A cement-SCM composition , comprising:a cement fraction that provides hydraulic cement particles with a d90 in a range of 11 μm to 30 μm, a d10 equal to or greater than 2 μm, and a ratio d90/d10 of less than or equal to 14.5;a coarse SCM fraction that provides coarse SCM particles with an average particle size that is about 1.25 times to about 25 times greater than an average particle size of the hydraulic cement particles and so that greater than 50% of particles larger than 20 μm provided by the coarse SCM fraction and the cement fraction comprise the coarse SCM particles; andan ultrafine SCM fraction that provides ultrafine SCM particles with a particle size so that at least 50% of particles smaller than 3 μm provided by the ultrafine SCM fraction and the cement fraction comprise the ultrafine SCM particles.2. A cement-SCM composition as in claim 1 , wherein the cement fraction comprises one or more minerals that claim 1 , when mixed with water claim 1 , react to form a cementitious binder comprised of at least one of calcium silicate hydrates or calcium ...

Silicon carbide ceramic and honeycomb structure

Provided is a silicon carbide ceramic having a small amount of resistivity change due to temperature change and being capable of generating heat by current application; and containing silicon carbide crystals having 0.1 to 25 mass % of 4H—SiC silicon carbide crystals and 50 to 99.9 mass % of 6H—SiC silicon carbide crystals, preferably having a nitrogen content of 0.01 mass % or less, more preferably containing two or more kinds of silicon carbide particles containing silicon carbide crystals and silicon for binding these silicon carbide particles to each other and having a silicon content of from 10 to 40 mass %.

Honeycomb structure comprising a cement skin composition with crystalline inorganic fibrous material

Disclosed is a honeycomb support structure comprising a honeycomb body and an outer layer or skin formed of a cement that includes an inorganic filler material having a first coefficient of thermal expansion from 25° C. to 600° C. and a crystalline inorganic fibrous material having a second coefficient of thermal expansion from 25° C. to 600° C.

DIMENSIONAL CONTROL OF CERAMIC STRUCTURES VIA COMPOSITION

Disclosed herein are methods for controlling and/or predicting the shrinkage and/or growth of a ceramic honeycomb structure between a green body state and a fired state by adjusting the hydrated alumina content of the batch composition. Also disclosed herein is substantially clay-free cordierite honeycombs produced in accordance with such methods. 1. A method of controlling the shrinkage and/or growth of a ceramic honeycomb structure between a green body state and a fired state , the method comprising:(a) providing a batch composition suitable for making a ceramic honeycomb structure;(b) extruding the batch composition into a green honeycomb structure;(c) measuring the dimensions of the green honeycomb structure;(d) firing the green honeycomb structure;(e) measuring the dimensions of the fired honeycomb structure;(f) determining the shrinkage or growth of the fired honeycomb structure as compared to the green honeycomb structure;(g) adjusting the hydrated alumina content of the composition by the addition of a selected amount of at least one hydrated alumina to the batch composition; and(h) repeating steps (a)-(g) as necessary to obtain a desired level of shrinkage or growth between the green body and fired states.2. The method of claim 1 , wherein the batch composition is substantially clay-free cordierite compositions.3. The method of claim 2 , wherein the batch composition comprises at least one source of silica claim 2 , alumina claim 2 , magnesium claim 2 , or combinations thereof.4. The method of claim 3 , wherein the batch composition further comprises at least one glass forming metal oxide source.5. The method of claim 4 , wherein the at least one glass forming metal oxide source comprises an yttrium source claim 4 , a lanthanum source claim 4 , or a combination thereof.6. The method of claim 5 , wherein the at least one glass forming metal oxide source comprises at least one source of calcium claim 5 , potassium claim 5 , sodium claim 5 , lithium claim 5 , ...

Stabilized Ceramic Composition, Apparatus and Methods of Using the Same

In one aspect, the invention includes a refractory material, said material comprising: (i) at least 20 wt. % of a first grain mode stabilized zirconia based upon the total weight of said material, said first grain mode having a D50 grain size in the range of from 5 to 2000 μm, said stabilized zirconia including a matrix oxide stabilizer; (ii) at least 1 wt. % of a second grain mode having a D50 grain size in the range of from 0.01 μm up to not greater than one-fourth the D50 grain size of said first grain mode zirconia, based upon the total weight of said material; and (iii) at least 1 wt. % of a preservative component within at least one of said first grain mode stabilized zirconia, said second grain mode stabilized zirconia, and an optional another grain mode; wherein after sintering, said material has porosity at 20° C. in the range of from 5 to 45 vol %. 127.-. (canceled)28. A method of preparing a ceramic composition comprising the steps of:a) preparing a granular ceramic composition including at least:(i) at least 20 wt. % of a first grain mode based upon the total weight of said ceramic composition, said first grain mode comprising stabilized zirconia having a D50 grain size in the range of from 5 to 2000 μm, said stabilized zirconia including a matrix oxide stabilizer; and(ii) at least 1 wt. % of a second grain mode having a D50 grain size in the range of from 0.01 μm up to not greater than one-fourth the D50 grain size of said first grain mode based upon the total weight of said ceramic composition,{'sub': 2', '3', '2, '(iii) at least 1 wt. % of a preservative component within the ceramic composition, based upon the total weight of said ceramic composition, said preservative component selected from at least one of an yttrium-containing compound, CaO, MgO, YO, CeO, and mixtures thereof;'}b) combining said first grain mode, said second grain mode, and said preservative component to form a dispersed composition; andc) sintering said dispersed composition at a ...

Porous inorganic body

The present invention relates to a porous inorganic body comprising pores A having a pore size S A in the range of from 0.005 to 20 micrometer and a total pore volume V A , and comprising pores B having a pore size S B in the range of from more than 20 to 1000 micrometer and a total pore volume V B , wherein the total pore volume of the pores having a pore size in the range of from 0.005 to 1000 micrometer is V C and wherein the ratio R A =V A /V C is in the range of from 0.3 to 0.7 as determined via mercury intrusion porosimetry.

Reactor Components

The present disclosure relates to insulation components and their use, e.g., in regenerative reactors. Specifically, a process and apparatus for managing temperatures from oxidation and pyrolysis reactions in a reactor, e.g., a thermally regeneratating reactor, such as a regenerative, reverse-flow reactor is described in relation to the various reactor components.

CELLULAR CERAMIC ARTICLES WITH COATED CHANNELS AND METHODS FOR MAKING THE SAME

Cellular ceramic articles are manufactured from a green cellular ceramic body that includes a binder material and a plurality of channels. At least one of the channels is coated with a slurry that includes a green coating composition and a solvent to form a coating layer. The binder material is insoluble in the solvent. 1. A method of manufacturing a cellular ceramic article comprising:providing a green cellular ceramic body comprising a binder material and a plurality of channels; andcoating at least one of the plurality of channels that is intended to be plugged as an inlet channel with a slurry comprising a green coating composition and a solvent to form a coating layer on at least one of the plurality of channels that is intended to be plugged as an inlet channel;wherein the binder material is insoluble in the solvent and the at least one of the plurality of channels is unplugged when coated with the slurry; andwherein, subsequent to a firing step, the average pore diameter of pores in the coating layer is at least 5% smaller than the average pore diameter of pores in a wall on the channel on which it is coated.2. The method of claim 1 , wherein the solvent comprises at least one of an alcohol claim 1 , ester alcohol claim 1 , ester claim 1 , hydrocarbon claim 1 , aldehyde claim 1 , ketone claim 1 , and carboxylic acid.3. The method of claim 1 , wherein the green cellular ceramic body comprises at least one material that upon firing reacts to form at least one material selected from the group consisting of aluminum titanate (AT) claim 1 , metals claim 1 , intermetallics claim 1 , mullite claim 1 , cordierite claim 1 , alumina (AlO) claim 1 , silicon carbide (SiC) claim 1 , silicon nitride (SiN) claim 1 , silicon aluminum oxynitride (SiAlON) claim 1 , and zeolites.4. The method of claim 1 , wherein the binder material comprises at least one cellulose ether.5. The method of claim 1 , wherein the green coating composition comprises at least one material that upon ...

BODY FORMED OF REFRACTORY MATERIAL HAVING STRESS RELIEF SLITS AND METHOD OF FORMING THE SAME

The present invention is directed to a body formed of a refractory material and a method of forming a refractory body. The body formed of a refractory material comprises a plurality of slits formed into one of its surfaces. The slits relieve thermal stress in the body and prevent cracking that would otherwise occur. In one embodiment, the invention can be a body formed of a refractory material comprising: a first surface and an opposing second surface; and a pattern of stress relief slits formed into at least one of the first and second surfaces of the body. 1. A body formed of a refractory material comprising:a first surface and an opposing second surface; anda pattern of stress relief slits formed into at least one of the first and second surfaces of the body.2. The body of wherein each of the stress relief slits has a depth of approximately inch or more and a width of approximately 1/16 inch or less.3. The body of wherein a ratio of a thickness of the body to a depth of the stress relief slits is between approximately 2:1 and approximately 8:1.4. The body of wherein the pattern of stress relief slits comprises a first set of substantially parallel slits and a second set of substantially parallel slits.5. The body of wherein slits of the first set of substantially parallel slits are substantially perpendicular to slits of the second set of stibstantially parallel slits.6. The body of further comprising a top edge claim 4 , a bottom edge claim 4 , a left-side edge and a right-side edge claim 4 , and wherein each slit of the first set extends from the top edge of the body to the bottom edge of the body claim 4 , and wherein each slit of the second set extends from of the left-side edge ot the body to the riehtside edge of the body.7. The body of wherein slits of the first and second sets are formed from a plurality of spaced apart slit segments so that each of the slits of the first and second sets is a discontinuous slit.8. The body of wherein the pattern of stress ...

Process for preparing an insulating material

Process for manufacturing a thermally insulating material comprising the following steps: a) preparing an aqueous mixture of a solid mineral substance in suspension having a specific surface area S of greater than 5 m 2 /g; b) adding to the mixture at least one pore-forming agent; c) stirring so as to obtain a homogeneous mixture; d) preforming a substrate from the homogeneous mixture; e) optionally drying the substrate at least partially; f) removing, at least partially, the pore-forming agent; and such that said specific surface area S, expressed in m 2 /g and measured by BET, and the mean particle diameter Dpm of the pore-forming agents, expressed in micrometers and measured by dynamic light scattering, obey the relation: 1/ S <Dpm<50/ S.

Method and apparatus for sintering flat ceramics

A method and apparatus for sintering flat ceramics using a mesh or lattice is described herein.

Honeycomb Extrusion Apparatus and Methods

A honeycomb extrusion apparatus includes a die body and a mask defining a peripheral gap. The peripheral gap includes a first extrusion cross section at a first radial location relative to the extrusion axis and a second extrusion cross section at a second radial location relative to the extrusion axis. An overall flow area of the first extrusion cross section is less than an overall flow area of the second extrusion cross section. In further examples, methods include co-extruding a honeycomb body with an integral skin with the overall flow area of the first extrusion cross section being less than the overall flow area of the second extrusion cross section. In further examples, methods include compensating for different skin flow characteristics associated with a particular honeycomb network configuration of discharge slots in a die body.

HONEYCOMB STRUCTURE BODY

There is disclosed a honeycomb structure body having joining material layers of a stress relaxing function and joining strength equivalent to those of joining material layers of a conventional honeycomb structure body, and having an excellent heat shock resistance. A honeycomb structure body includes a plurality of honeycomb segments and joining material layers having a plurality of pores and joining the plurality of honeycomb segments in a state where the honeycomb segments are arranged adjacent to each other so that side surfaces of the honeycomb segments face each other. A ratio of the number of pores having a value of 1.2 or less which is obtained by dividing a maximum diameter of each of the pores by a minimum diameter of the each of the pores is 60% or more of the number of all the pores of each of the joining material layers. 1. A honeycomb structure body comprising:a plurality of honeycomb segments having porous partition walls with which a plurality of cells extending from one end surface to the other end surface to become through channels of a fluid are formed, and an outer peripheral wall positioned at the outermost periphery and disposed to surround the partition walls, and having plugged portions arranged in one end portion of each of predetermined cells and the other end portion of each of the remaining cells; andjoining material layers having a plurality of pores and joining the plurality of honeycomb segments in a state where the honeycomb segments are arranged adjacent to each other so that side surfaces of the honeycomb segments face each other,wherein a ratio of the number of pores having a value of 1.2 or less which is obtained by dividing a maximum diameter of each of the pores by a minimum diameter of the each of the pores is 60% or more of the number of all the pores of each of the joining material layers.2. The honeycomb structure body according to claim 1 ,{'b': 2', '1', '1', '2, 'wherein when the one honeycomb segment among the plurality of ...

Porous Ceramic Sintered Body

The present invention provides a porous ceramic sintered body suitable for plant growth and with a high cooling effect. 1. A porous ceramic sintered body comprising a pore volume , which is the total volume of pores with a diameter of 3 nm to 360 μm , of 0.2 cm/g or larger and comprising a micropore volume ratio of 30% by volume or more , in which the micropore volume ratio equals to the total volume of pores with a diameter equal to or greater than 0.01 μm and less than 1 μm divided by the pore volume.2. The porous ceramic sintered body according to claim 1 , wherein a median pore diameter of pores with a diameter of 3 nm to 360 μm is smaller than 40 μm.3. The porous ceramic sintered body according to claim 1 , comprising a layer-like dense layer having a bulk specific gravity of 0.7 g/cmor more.4. The porous ceramic sintered body according to claim 1 , further comprising a non-dense layer having a bulk specific gravity of less than 0.7 g/cm.5. The porous ceramic sintered body according to claim 4 , wherein the non-dense layer is provided on both surfaces of the dense layer.6. The porous ceramic sintered body according to claim 1 , used as a greening base material. The present invention relates to a porous ceramic sintered body.Priority is claimed on Japanese Patent Application No. 2010-208458, filed Sep. 16, 2010, the content of which is incorporated herein by reference.Generally, a porous ceramic sintered body is used for an insulating refractory material, a water purification material, a humidity conditioning material, a volatile organic compound (VOC) adsorption material or the like. As a structure of this porous ceramic sintered body, a closed-cell foam type structure, a lattice type structure, an aggregate type structure, a structure with minute cracked pores, a structure with consecutive through holes, and the like are exemplary examples and the structure is selected depending on the use.A porous ceramic sintered body having a lattice type structure in which ...

POROUS CERAMIC BODIES AND PROCESS FOR THEIR PREPARATION

A process for producing a porous ceramic body may include: a) mixing a coated porogen with a silicate or an oxide ceramic precursor, wherein the porogen is decomposable to gaseous decomposition products and optionally solid products upon heating, and is coated with a coated agent; b) forming a green body from the mixture obtained in step (a); and c) firing the green body obtained in step (b) to obtain the ceramic body, whereby the porogen decomposes to form pores within the ceramic body, and the coating agent is deposited at the inner surface of the pores. The porogen may be coated with a coating agent which, upon firing, is deposited at the inner surface of the ceramic pores, so that porous ceramics having decreased weight and improved porosity are obtained, while maintaining good mechanical strength. A green body and porous ceramic body obtainable with the above-mentioned process are also described. 118-. (canceled)19. A porous ceramic body having total porosity of at least 10% , open porosity lower than 1.5% and closed porosity of at least 8.5% , wherein the inner surface of the pores is covered by the thermolysis product of a porogen coated with a coating agent.20. The porous ceramic body of claim 19 , having total porosity ranging from 15 to 30%.21. The porous ceramic body of claim 19 , having open porosity ranging from 0.01 to 1.0%.22. The porous ceramic body of claim 19 , having closed porosity ranging from 19 to 24%.23. The porous ceramic body of claim 19 , having an average pore diameter ranging from 10 to 500 μm.24. The porous ceramic body of claim 19 , having bulk density lower than 2.4 g/cm.25. The porous ceramic body of claim 19 , having a bulk density reduction of at least 8%.26. The porous ceramic body of claim 19 , having water absorption lower than 2% wt.27. The porous ceramic body of claim 19 , wherein said pores are generally spherical in shape.28. The porous ceramic body of claim 19 , wherein said pores are generally fiber-shaped.29. A porous ...

SHUTTLE KILN FOR FIRING CERAMIC POROUS BODIES

The invention provides a shuttle kiln that can fire ceramic porous bodies containing organic binders in a shorter period of time than in conventional methods without occurring breaks due to a temperature difference between the inside and the outside. The shuttle kiln of the invention is suited for firing of ceramic porous bodies containing organic binders. It includes a gas suction path 4 that suctions in-furnace gas and discharges it via an afterburner 5 and a circulation path 7 that suctions the in-furnace gas to the furnace outside to burn organic binder gas and then returns it into the furnace. 1. A shuttle kiln for firing ceramic porous bodies containing organic binders , the kiln comprising:a gas suction path for suctioning in an in-furnace gas and exhausting it via an afterburner and;a circulation path for suctioning the in-furnace gas to the furnace outside, burning an organic binder gas, and drawing back the in-furnace gas into the furnace.2. The shuttle kiln according to claim 1 , wherein the in-furnace gas is suctioned to the gas suction path from a top or bottom portion of the furnace body and suctioned to the circulation path from a side wall of the furnace body.3. The shuttle kiln according to claim 1 , wherein the circulation path is provided with a catalytic reactor vessel for catalytic combustion of the suctioned in-furnace gas.4. The shuttle kiln according to claim 3 , comprising a fuel gas supply pipe mounted at a stage preceding the catalytic reactor vessel and used to supply a fuel gas.5. The shuttle kiln according to claim 3 , wherein the circulation path comprises:a heating device mounted at the stage preceding the catalytic reactor vessel and used to heat the suctioned in-furnace gas; anda cooling device mounted at a stage following the catalytic reactor vessel and used to lower a temperature of the gas having passed through the catalytic reactor vessel to a predetermined temperature.6. The shuttle kiln according to claim 1 , wherein the ...

Silicon carbide porous body, honeycomb structure, and electric heating type catalyst carrier

A silicon carbide porous body according to the present invention contains silicon carbide particles, metallic silicon, and an oxide phase, in which the silicon carbide particles are bonded together via at least one of the metallic silicon and the oxide phase. The primary component of the oxide phase is cordierite, and the open porosity is 10% to 40%. Preferably, the silicon carbide porous body contains 50% to 80% by weight of silicon carbide, 15% to 40% by weight of metallic silicon, and 1% to 25% by weight of cordierite. Preferably, the volume resistivity is 1 to 80 Ωcm, and the thermal conductivity is 30 to 70 W/m·K.

METHOD AND APPARATUS FOR ALIGNING A SUPPORT WITH RESPECT TO A HONEYCOMB BODY

Method is provided for applying a cement mixture to a honeycomb body including the step of aligning a first end of the honeycomb body with respect to a first longitudinal axis of a first support member. The method further includes the step of aligning a second support member with respect to the second end of the honeycomb body. The second support member is allowed to move relative to the first support member such that a second longitudinal axis of second support member is not coincident with the first longitudinal axis. The method further includes the step of fixing the position of the honeycomb body with respect to the first support member and the second support member. The method still further includes the step of applying a cement mixture to the honeycomb body. An apparatus is provided that is configured to apply a cement mixture to a honeycomb body 1. An apparatus configured to apply a cement mixture to a honeycomb body with a first end and a second end , the apparatus comprising:an applicator configured to apply the cement mixture to the honeycomb body;a first support member configured to rotate about a first longitudinal axis;a second support member configured to rotate about a second longitudinal axis;a base structure configured to rotatably support the second support member and permit relative movement between the second support member and the first support member between a first orientation where the second longitindinal axis is positioned with respect to the first longitudinal axis and a second orientation where the second longitudinal axis is not coincident with the first longitudinal axis; anda plurality of alignment members supported by the base structure and configured to be selectively extended and retracted with respect to the base structure, wherein the alignment members are configured to engage the second end of the honeycomb body to align the second support member with respect to the second end of the honeycomb body.2. The apparatus of claim 1 , ...

Porous carbon product with layer composite structure, method for producing same and use thereof

Inexpensive product consisting of porous carbon, with a pore structure which is suitable for retaining electrode parts which can be used in particular for a use as an electrode material for a lithium-sulphur secondary battery, and a method comprising the following method steps: (a) providing a template consisting of inorganic material which contains spherical nanoparticles and pores, (b) infiltrating the pores of the template with a precursor for carbon of a first variety, (c) carbonizing so as to form an inner layer on the nanoparticles with a first microporosity, (d) infiltrating the remaining pores of the template with a precursor substance for carbon of a second variety, (e) carbonizing the precursor substance, wherein an outer layer with a second microporosity which is lower than the first microporosity is produced on the inner layer, and (f) removing the template so as to form the carbon product with layer composite structure, comprising an inner layer consisting carbon with a first, relatively high microporosity, which has a free surface facing a cavity, and an outer layer consisting of carbon with a second, relatively low microporosity, which has a free surface facing away from the cavity.

Zirconia-based material doped with yttrium and lanthanum

Sintered bodies containing zirconia-based ceramic materials and partially sintered bodies that are intermediates in the preparation of the sintered bodies are described. The zirconia-based ceramic material is doped with lanthanum and yttrium. The grain size of the zirconia-based ceramic material can be controlled by the addition of lanthanum. The crystalline phase of the zirconia-based ceramic material can be influenced by the addition of yttrium.

Honeycomb structure

A honeycomb structure 100 has a plurality of flow paths 110 a and 110 b which are partitioned by partition walls 120 and are substantially parallel to each other; and one end of the flow path 110 a is plugged by a plugging part 130 at one end surface 100 a of the honeycomb structure 100 , and one end of the flow path 110 b is plugged by a plugging part 130 at the other end surface 100 b of the honeycomb structure 100 , wherein, in an image of the partition walls 120 obtained by X-ray CT measurement, when the number of communicating holes detected when resolution of the image is 1.5 μm/pixel is defined as X, and the number of communicating holes detected when resolution of the image is 2.5 μam/pixel is defined as Y, Y/X is 0.58 or more.

Compositions and Methods For Plugging Honeycomb Bodies With Reduced Plug Depth Variability

A composition for applying to a honeycomb body includes a refractory filler, an organic binder, an inorganic binder, and a liquid vehicle, wherein the refractory filler, the particle size distribution of the refractory filler, the organic binder, and the inorganic binder are selected such that, when the composition is applied to plug a plurality of channels of the honeycomb body, the plug depth variability is reduced. 1. A composition for applying to a honeycomb body having a plurality of parallel channels , the composition comprising:a refractory filler having a particle size distribution;an organic binder;an inorganic binder; anda liquid vehicle;wherein the inorganic binder comprises a polydisperse colloidal silica.2. The composition of claim 1 , wherein the refractory filler comprises at least one inorganic powder selected from the group consisting of cordierite claim 1 , mullite claim 1 , aluminum titanate claim 1 , silicon carbide claim 1 , silicon nitride claim 1 , calcium aluminate claim 1 , beta-eucryptite claim 1 , and beta-spodumene.3. The composition of claim 2 , wherein the refractory filler has a median particle size (D) of from 10 to 50 microns.4. The composition of claim 1 , wherein the polydisperse colloidal silica comprises a surface area of less than or equal to about 150 m/g.5. The composition of claim 1 , wherein the composition sets at a temperature of less than 200° C.6. The composition of claim 1 , wherein the inorganic binder comprises non-gelled colloidal silica.7. The composition of claim 1 , wherein the polydisperse colloidal silica consists of a disperse colloidal silica comprising a first particle size distribution and a second particle size distribution greater than the first particle size distribution.8. The composition of claim 7 , wherein the first particle size distribution comprises a Dof greater than about 10 nm and less than about 40 nm and the second particle size distribution comprises a Dof greater than about 40 nm and less ...

Porous, silicate, ceramic body, dental restoration and method for the production thereof

The present invention relates to a porous, silicate, ceramic body, possibly with different colors, with a first density, which can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, amounts to 25 to 180 MPa.

Honeycomb structure

There are disclosed a honeycomb structure hardly generates ring cracks; and a honeycomb structure 100 includes a honeycomb basal body 4 having porous partition walls 1 defining a plurality of cells 2 to become through channels of a fluid; and a ring-shaped convex portion 10 being a ring of convex portion surrounding an outer periphery of the honeycomb basal body 4 over the whole periphery; and the ring-shaped convex portion 10 is disposed to project outwardly from the outer periphery of the honeycomb basal body 4 and to cover a part of the outer periphery of the honeycomb basal body 4 , the shapes of both end portions of the ring-shaped convex portion are tapered shape, and a thickness of the ring-shaped convex portion 10 in a cross section perpendicular to an extending direction of the cells 2 is from 3 to 20 mm.

MOISTURE WICKING MORTAR WITH MICROTUBES

A novel mortar mix and mortar formed therewith. The mortar contains sand, lime, cement and microtubes in a mixture thereof. The microtubes assist in wicking moisture directly through a wet mortar compound formed by adding water to the mortar mix. Wicking moisture directly through the mortar decreases the reliance on a continuous, unobstructed cavity behind the masonry wall, as well as prevent cracking from water's freeze-thaw cycle. It also allows water to pass through the mortar in a similar manner as the masonry, creating two in-sync cycles, rather then two disparate cycles for water flow. In various embodiments, the microtubes could be composed of cellulose, fabricated polymer or graphite. 1. A mortar mix comprising:lime;sand;cement; andmicrotubes mixed in with the lime, sand and cement.2. The mortar mix of claim 1 , wherein:the microtubes comprise cellulose.3. The mortar mix of claim 1 , wherein:the microtubes comprise a fabricated polymer.4. The mortar mix of claim 1 , wherein:the microtubes comprise graphite.5. The mortar mix of claim 1 , wherein the microtubes are treated with a waterproofing agent prior to being mixed with said lime claim 1 , said sand and said cement.6. A process for making a dry mortar mix claim 1 , said process comprising:obtaining lime, sand, cement and microtubes; andforming said dry motor mix by mixing together said lime, said sand, said cement and said microtubes, wherein said microtubes assist in wicking moister from a wet mortar formed by mixing water with said dry mortar mix.7. The process of claim 6 , wherein:the microtubes comprise cellulose.8. The process of claim 6 , wherein:the microtubes comprise a fabricated polymer.9. The process of claim 6 , wherein:the microtubes comprise graphite.10. The process of claim 6 , further comprising treating the microtubes with a waterproofing agent prior to the mixing with said lime claim 6 , said sand and said cement.11. A dry mortar mix comprising:lime;sand;cement; andmicrotubes mixed in ...

Monolithic separation membrane structure and method of manufacture thereof

A monolithic separation membrane structure comprises a substrate, a first support layer and a separation membrane. The substrate is composed of a porous material and including a plurality of through holes. The first support layer is formed on an inner surface of the plurality of through holes. The separation membrane arranged in the first support layer. The first support layer includes an aggregate material having alumina as a main component, an inorganic binder have titania as a main component, and a sintering additive having at least one of silica and magnesia as a main component.

COMPOSITE CERAMIC FILTER MATERIAL FOR HIGH TEMPERATURE FLUE GAS DUST REMOVAL

The invention provides a composite ceramic filter material for high temperature flue gas dust removal, wherein the filter material is prepared by the following method: provide corn stalk raw material and silicon powder, crush the corn stalk raw material and pyrolyze the crushed corn stalk raw material to obtain carbonized corn stalks; spread silicon powders on the corn stalk raw material to obtain mixed powder; perform first high-temperature heat treatment on the mixed powder to obtain silicon carbide powder; add silicon carbide powder into ethanol; add PVB to the ethanol suspension of silicon carbide to obtain a dispersion solution of silicon carbide; perform surface treatment on the aluminum alloy base material; porous silicon carbide film is formed on the surface of the surface treated aluminum alloy by air spraying technology; perform pre-sintering on the porous silicon carbide film; perform sintering on the pre-sintered porous silicon carbide film. 1. A composite ceramic filter material for high temperature flue gas dust removal , characterized in that: the filter material is prepared by the following method:Provide corn stalk raw materials and silicon powder;Crush the corn stalk raw material and pyrolyze the crushed corn stalk raw material to obtain carbonized corn stalks;Spread silicon powders on the corn stalk raw material to obtain mixed powder;Perform first high-temperature heat treatment on the mixed powder to obtain silicon carbide powder;Add silicon carbide powder into ethanol;Add PVB to the ethanol suspension of silicon carbide to obtain a dispersion solution of silicon carbide,Perform surface treatment on the aluminum alloy base material; Porous silicon carbide film is formed on the surface of the surface treated aluminum alloy by air spraying technology;Perform pre-sintering on the porous silicon carbide film;Perform sintering on the pre-sintered porous silicon carbide film.2. The composite ceramic filter material for high temperature flue gas dust ...

POROUS SUPPORT, METHOD FOR MANUFACTURING POROUS SUPPORT, SEPARATION MEMBRANE STRUCTURE, AND METHOD FOR MANUFACTURING SEPARATION MEMBRANE STRUCTURE

A porous support includes a base body, a supporting layer, and a topmost layer. The supporting layer is disposed between the base body and the topmost layer, and makes contact with the topmost layer. A ratio of a porosity of the topmost layer to a porosity of the supporting layer is greater than or equal to 1.08. A ratio of a thickness of the topmost layer to a thickness of the supporting layer is less than or equal to 0.9. 1. A porous support comprising:a base body,a topmost layer, anda supporting layer being disposed between the base body and the topmost layer and making contact with the topmost layer, whereina ratio of a porosity of the topmost layer to a porosity of the supporting layer is greater than or equal to 1.08, anda ratio of a thickness of the topmost layer to a thickness of the supporting layer is less than or equal to 0.9.2. The porous support according to claim 1 , whereinthe ratio of the porosity of the topmost layer to the porosity of the supporting layer is less than or equal to 1.40.3. The porous support according to claim 1 , whereina porosity of the supporting layer is greater than or equal to 12%, anda porosity of the topmost layer is greater than or equal to 30%.4. The porous support according to claim 1 , whereina porosity of the supporting layer is greater than or equal to 35%, anda porosity of the topmost layer is greater than or equal to 38%.5. The porous support according to claim 1 , whereina porosity of the supporting layer is less than or equal to 42%.6. The porous support according to claim 1 , whereina porosity of the topmost layer is less than or equal to 48%.7. The porous support according to claim 1 , whereina thickness of the supporting layer is greater than or equal to 10 μm, anda thickness of the topmost layer is greater than or equal to 0.1 μm.8. The porous support according to claim 1 , whereina thickness of the supporting layer is less than or equal to 250 μm.9. The porous support according to claim 1 , whereina thickness ...

METHOD FOR PRODUCING PLUGGED HONEYCOMB STRUCTURE

The present invention includes recognizing, as positions of outermost circumferential cells, positions each of which is calculated from an average cell pitch of usual cells and each of which is present on an inner side from a circumference of an end face of a honeycomb structure; disposing, on the basis of the recognition, virtual perforation regions at positions on a sheet which correspond to the outermost circumferential cells to be plugged, each of the virtual perforation regions being divided into a plurality of squares; and performing perforation processing of perforating at least one of a plurality of squares in each of the virtual perforation regions. Positions and a number of squares to be perforated in each of the virtual perforation regions are individually set in accordance with each of the positions of the outermost circumferential cells to be plugged to which each of the virtual perforation regions corresponds. 1. A method for producing a plugged honeycomb structure including a honeycomb structure in which a porous partition wall defines and forms a plurality of cells communicating between two end faces of the honeycomb structure , and plugging portions which are arranged to plug one of two open ends of each of the plurality of cells , the plurality of cells being constituted of outermost circumferential cells positioned in an outermost circumferential portion of the honeycomb structure , and usual cells other than the outermost circumferential cells , the method comprising:attaching a transparent sheet to an end face of the honeycomb structure;imaging the end face;performing image processing of an image obtained by imaging the end face to recognize positions of the usual cells;performing perforation processing, on the basis of the recognition of the positions of the usual cells, at the positions on the sheet which correspond to the usual cells to be plugged;recognizing, as positions of the outermost circumferential cells, positions each of which is ...

Composite Ceramics and Ceramic Particles and Method for Producing Ceramic Particles and Bulk Ceramic Particles

Methods for producing Polymer Derived Ceramic (PDCs) particles and bulk ceramic components and compositions from partially cured gelatinous polymer ceramic precursors and unique bulk composite PDC ceramics and unique PDC ceramic particles in size and composition. Methods of making fully dense PDCs over approximately 2 μm to approximately 300 mm in diameter for applications such as but not limited to proppants, hybrid ball bearings, catalysts, and the like. Methods can include emulsion processes or spray processes to produce PDCs. The ceramic particles and compositions can be shaped and chemically and materially augmented with enhancement particles in the liquid resin or gelatinous polymeric state before being pyrolyzed into ceramic components. The resulting ceramic components have a very smooth surface and are fully dense, not porous as ceramic components from the sol-gel process.

POROUS PLATE-SHAPED FILLER

Provided is a porous plate-shaped filler that can be used as a material for a heat-insulation film having excellent heat insulation performance. In a porous plate-shaped filler having a plate shape, an aspect ratio is 3 or higher, a minimum length is 0.5 to 50 μm, and an overall porosity is 20 to 90%, and the porosity is lower in the circumferential part than in the center part. When this porous plate-shaped filler of the present invention is contained in a heat-insulation film, the infiltration of a matrix into the filler is reduced, and thus the thermal conductivity can be lowered. Therefore, even a thin heat-insulation film can have a greater heat-insulation effect than before. 1. A porous plate-shaped filler having a plate shape with an aspect ratio of 3 or higher , a minimum length of 0.5 to 50 μm , and an overall porosity of 20 to 90% , wherein the porosity is lower in the circumferential part than in the center part.2. The porous plate-shaped filler according to claim 1 , wherein the center part and the circumferential part have the same type of material for a base material.3. The porous plate-shaped filler according to claim 1 , wherein the center part and the circumferential part have a different type of material for a base material.4. The porous plate-shaped filler according to claim 1 , wherein the type of material of the circumferential part contains at least one of a fluororesin claim 1 , a silicone resin claim 1 , a polyimide resin claim 1 , a polyamide resin claim 1 , an acrylic resin claim 1 , and an epoxy resin.5. The porous plate-shaped filler according to claim 1 , wherein the circumferential part has a porosity which is lower by 10% or more than the center part.6. The porous plate-shaped filler according to claim 1 , wherein the average pore diameter is smaller in the circumferential part than in the center part.7. The porous plate-shaped filler according to claim 1 , wherein the average pore diameter of the circumferential part is 0.1 μm or less ...

Method of preparing silicon carbide and filters made therefrom

A method of making SiC nanowires comprising: (a) mixing silicon powder with a carbon-containing biopolymer and a catalyst at room temperature to form a mixture; and (b) heating said mixture to a pyrolyzing temperature sufficient to react said biopolymer and said silicon power to form SiC nanowires.

LIGHT-TRANSMITTING CERAMIC SINTERED BODY AND METHOD FOR PRODUCING SAME

The present invention relates to a light-transmitting ceramic sintered body which contains air voids having pore diameters of 1 μm or more but less than 5 μm at a density within the range of from 10 voids/mmto 4,000 voids/mm(inclusive), while having a closed porosity of from 0.01% by volume to 1.05% by volume (inclusive). With respect to this light-transmitting ceramic sintered body, a test piece having a thickness of 1.90 mm has an average transmittance of 70% or more in the visible spectrum wavelength range of 500-900 nm, and the test piece having a thickness of 1.90 mm has a sharpness of 60% or more at a comb width of 0.5 mm. 1. A light-transmitting ceramic sintered body containing air bubbles each having a pore size of 1 μm or more and less than 5 μm in an amount of 10 bubbles/mmor more and 4 ,000 bubbles/mmor less , and having a closed porosity of 0.01 vol % or more and 1.05 vol % or less; andhaving an average transmittance of a test specimen of the light-transmitting ceramic sintered body having a thickness of 1.90 mm of 70% or more with respect to a visible spectrum with a wavelength of 500 to 900 nm, and a clarity in a comb width of 0.5 mm of a test specimen of the light-transmitting ceramic sintered body having a thickness of 1.90 mm of 60% or more.2. A light-transmitting ceramic sintered body containing air bubbles each having a pore size of 1 μm or more and less than 5 μm in an amount of 10 bubbles/mmor more and 4 ,000 bubbles/mmor less , and having a closed porosity of 0.01 vol % or more and 1.05 vol % or less; andhaving an average transmittance of a test specimen of the light-transmitting ceramic sintered body having a thickness of 0.80 mm of 74% or more with respect to a visible spectrum with a wavelength of 500 to 900 nm, and a clarity in a comb width of 0.5 mm of a test specimen of the light-transmitting ceramic sintered body having a thickness of 0.80 mm of 75% or more.3. A light-transmitting ceramic sintered body containing air bubbles each having ...

POROUS ACID-RESISTANT CERAMIC MEDIA

The present disclosure relates to a porous ceramic media that may include a chemical composition, a phase composition, a total open porosity content of at least about 10 vol. % and not greater than about 70 vol. % as a percentage of the total volume of the ceramic media, and a nitric acid resistance parameter of not greater than about 500 ppm. The chemical composition for the porous ceramic media may include SiO, AlO, an alkali component and a secondary metal oxide component selected from the group consisting of an Fe oxide, a Ti oxide, a Ca oxide, a Mg oxide and combinations thereof. The phase composition may include an amorphous silicate, quartz and mullite. 1. A porous ceramic media comprising:{'sub': 2', '2', '3, 'a chemical composition comprising SiO, AlO, an alkali component and a secondary metal oxide component selected from the group consisting of an Fe oxide, a Ti oxide, a Ca oxide, a Mg oxide and combinations thereof;'}a phase composition comprising amorphous silicate, quartz and mullite;a total open porosity content of at least about 10 vol. % and not greater than about 70 vol. % as a percentage of the total volume of the ceramic media, anda nitric acid resistance parameter of not greater than about 500 ppm.2. The porous ceramic media of claim 1 , wherein the chemical composition comprises:{'sub': '2', 'a content of SiOof at least about 65.0 wt. % and not greater than about 85.0 wt. % as a percentage of the total weight of the porous ceramic media;'}{'sub': 2', '3, 'a content of AlOof at least about 10 wt. % and not greater than about 30 wt. % as a percentage of the total weight of the porous ceramic media;'}a content of the alkali component of at least about 2 wt. % and not greater than about 8 wt. % as a percentage of the total weight of the porous ceramic media; anda content of the secondary metal oxide component of at least about 1 wt. % and not greater than about 5 wt. % as a percentage of the total weight of the porous ceramic media.3. The porous ...

POROUS CERAMIC PARTICLE AND POROUS CERAMIC STRUCTURE

A porous ceramic particle () has a pair of main surfaces () in parallel with each other. An average porosity in a range () extending from one main surface () toward the other main surface () and having a thickness which is one fourth of a particle thickness that is a distance between the main surfaces is higher than that in a range () which is positioned in the center between the pair of main surfaces and has a thickness which is half of the particle thickness. The upper main surface () is a surface to be placed on an object. By limiting an area having a high porosity to the vicinity of the one main surface (), it is possible to cause the porous ceramic particle () to have low thermal conductivity and low heat capacity and suppress a decrease in the mechanical strength. 1. A porous ceramic particle which has a plate-like shape having a pair of main surfaces in parallel with each other , whereinan average porosity in a range of one fourth of a particle thickness which is a distance between said pair of main surfaces, said range of one fourth of a particle thickness existing from one main surface toward the other main surface among said pair of main surfaces, is higher than that in a range of half of said particle thickness, which is positioned in the center between said pair of main surfaces.2. The porous ceramic particle according to claim 1 , whereina plurality of recessed portions each of which is larger than a pore which is open in said one main surface are present in said one main surface, anda range in which said plurality of recessed portions are present in a thickness direction is not smaller than 0.5 μm and not larger than one fourth of said particle thickness.3. The porous ceramic particle according to claim 1 , comprising:a first porous portion including said one main surface, pores being present substantially uniformly in said first porous portion; anda second porous portion being in contact with said first porous portion and including said range which is ...

Monolithic base and production method therefor

The monolithic base is a porous alumina body that includes pores and that is configured by alumina particles as an aggregate and an oxide phase as a binding material. The alumina particles include microscopic alumina particles having a particle diameter of greater than or equal to 0.5 μm and less than or equal to 5 μm and coarse alumina particles having a particle diameter of greater than 5 μm. The number of microscopic alumina particles that are encapsulated in the oxide phase is greater than or equal to 50% of the total number of microscopic alumina particles and coarse alumina particles.

Circumferential coating material and circumferentially coated honeycomb structure

A circumferential coating material contains colloidal silica, silicon carbide, and titanium oxide different in particle diameters from silicon carbide, coats a circumferential surface of a honeycomb structure monolithically formed by extrusion, including as a main component, cordierite having a porosity of 50 to 75%, and forms a circumferential coating layer. A circumferentially coated honeycomb structure has a honeycomb structure comprising latticed porous partition walls defining and forming a plurality of polygonal cells forming through channels and extending from one end face to the other end face, and a circumferential coating layer formed by coating at least a part of a circumferential surface of the honeycomb structure with the circumferential coating material.

Heat insulator

One aspect of the heat insulator of the present invention includes a porous sintered body having a porosity of 70 vol % or more and less than 91 vol %, and pores having a pore size of 0.8 μm or more and less than 10 μm occupy 10 vol % or more and 70 vol % or less of the total pore volume, while pores having a pore size of 0.01 μm or more and less than 0.8 μm occupy 5 vol % or more and 30 vol % or less of the total pore volume. The porous sintered body is formed from an MgAl 2 O 4 (spinel) raw material and fibers formed of an inorganic material, the heat conductivity of the heat insulator at 1000° C. or more and 1500° C. or less is 0.40 W/(m·K) or less, and the weight ratio of Si relative to Mg in the porous sintered body is 0.15 or less.

HONEYCOMB STRUCTURAL BODY

In a cross section, perpendicular to an axial direction of a honeycomb structural body having partition walls and cells, a plurality of sections having a different cell density is formed from a central area toward an outer peripheral area, and a partition wall is formed between the sections adjacent to each other. The boundary section has boundary partition walls and plural boundary cells having a polygonal shape different in shape from the cells in the sections formed adjacent to the boundary section. The partition walls in the sections adjacent to the boundary section are connected by the boundary partition walls. A part of the boundary cell is surrounded by at least the boundary partition walls. A relationship of φ1/φ2≧1.25 is satisfied, where φ1 indicates an average hydraulic diameter of the boundary cells and φ2 indicates an average hydraulic diameter of the cells. 1. A honeycomb structural body formed as a monolithic mold comprising partition walls arranged in a lattice shape and a plurality of cells surrounded by the partition walls , whereinthe honeycomb structural body comprises a plurality of cell density sections having a different cell density formed in a radial direction from a central side to an outer peripheral side,{'b': '2', 'a boundary section is formed between the cell density sections () which are immediately adjacent,'}the boundary section comprises boundary partition walls and a plurality of boundary cells having a polygonal shape,the boundary partition walls connect the partition walls in the cell density sections formed adjacent to the boundary section,the boundary cells having a polygonal shape are different in shape from the cells,at least a part of the boundary cell is surrounded by the boundary partition walls, and {'br': None, 'φ1/φ2≧1.25,'}, 'the honeycomb structural body satisfies a relationship of'}where φ1 indicates an average hydraulic diameter of the boundary cells formed in the boundary section, and φ2 indicates an average ...

METHOD FOR MANUFACTURING ALUMINUM-TITANATE-BASED CERAMIC HONEYCOMB STRUCTURE

A method for manufacturing a ceramic honeycomb structure includes kneading titania particles, alumina particles and binder such that raw material paste including the titania particles, the alumina particles and the binder is prepared, extruding the raw material paste through a die for forming a honeycomb structure such that a body made of the raw material paste and having the honeycomb structure is formed, supporting the body extruded from the die on a holder while moving the holder along extrusion direction at a moving speed relative to an extruding speed of the raw material based on a target diameter size set for the body such that the diameter of the body held by the holder changes to the target diameter size, and sintering the body having the honeycomb structure with the target diameter size such that a ceramic body having the honeycomb structure with the target diameter size is formed. 1. A method for manufacturing a ceramic honeycomb structure , comprising:kneading titania particles, alumina particles and a binder such that a raw material paste comprising the titania particles, the alumina particles and the binder is prepared;extruding the raw material paste through a die for forming a honeycomb structure such that a body comprising the raw material paste and having the honeycomb structure is formed;supporting the body extruded from the die on a holder while moving the holder along an extrusion direction at a moving speed relative to an extruding speed of the raw material based on a target diameter size set for the body such that a diameter of the body held by the holder changes to the target diameter size; andsintering the body having the honeycomb structure with the target diameter size such that a ceramic body having the honeycomb structure with the target diameter size is formed,wherein the moving speed is less than the extruding speed such that the body extruded from the die is reduced in length with respect to a longitudinal direction of the honeycomb ...

Electronically conducting carbon and carbon-based material by pyrolysis of dead leaves and other similar natural waste

The present invention disclosed herein is carbon nanomaterial and carbon based nanocomposites by pyrolysis of dead leaves and other similar natural waste material. In particular, the invention relates to synthesis of valuable functional carbon materials and their nanocomposites from different waste materials such as plant dead leaves and their use in high value added product applications.

Porous articles, methods, and apparatuses for forming same

A mold for forming a porous article can include a first material having a first thermal conductivity and a second material having a second thermal conductivity different from the first thermal conductivity. The first material may be at least partially embedded within the second material and configured to create regions of different thermal conductivity in the body, such as configured to create distinct nucleation regions within a material formed within the mold. A method for forming a porous article can include providing a slurry within a mold and freeze-casting the slurry to form a porous article having a burst-like distribution of porosity. A porous article according to embodiments herein can include a burst-like distribution of porosity.

HONEYCOMB BODIES HAVING AN ARRAY OF THROUGH CHANNELS WITH A RANGE OF HYDRAULIC DIAMETERS

A ceramic honeycomb body, suitable for use in exhaust gas processing, includes a honeycomb structure having a plurality of through-channels, a first portion of the plurality of through-channels have a first hydraulic diameter dh, a second portion of the plurality of through-channels have a second hydraulic diameter that is smaller than the first hydraulic diameter dh, the first hydraulic diameter dh is equal to or greater than 1.1 mm, and the first and second portions of through-channels, taken together, have a geometric surface area GSA greater than 2.9 mm. Diesel oxidation catalysts and methods of soot removal are also provided, as are other aspects. 1. A honeycomb body , comprising: {'sup': '−1', 'a plurality of channels disposed in parallel to each other in an axial direction, wherein a first portion of the plurality of channels have a dh≥1.1 mm, a second portion of the plurality of channels have a dh<1.1 mm, and the plurality of channels comprise GSA≥2.9 mm, wherein dh is hydraulic diameter and GSA is a geometric surface area.'}, 'a honeycomb structure comprising a plurality of unit channel structures disposed in a repeating pattern, each unit channel structure comprising2. The honeycomb body of claim 1 , wherein the plurality of channels extend from an inlet face to an outlet face.3. The honeycomb body of claim 1 , wherein every channel of the plurality of channels is a flow-through channel.4. The honeycomb body of claim 1 , wherein every channel of the plurality of channels is devoid of plugging.5. The honeycomb body of claim 1 , wherein at least a portion of the plurality of channels have a catalytic coating disposed thereon.6. The honeycomb body of claim 1 , wherein the honeycomb body comprises:{'sup': '2', 'CD≥62.0 cm(400 cpsi);'}{'sup': 2', '2, 'the first portion of the plurality of channels comprise 6.2 channels/ cm(40 cpsi)≤CD≤46.5 channels/ cm(300 cpsi); and'}3%≤CR≤40% wherein CR is a channel ratio of a total cross-sectional area of the first portion ...

Honeycomb structural body

A honeycomb structural body has plural cell density sections having a cell density which is changed stepwise in a radial direction. A partition wall is formed between adjacent cell density sections. The cell density sections have a high cell density section having a maximum cell density, excepting an outermost cell density section formed at an outermost side, and a low cell density section having a minimum cell density, excepting an innermost cell density section formed at an innermost side. A relationship of V−Va≧Vb+Vs is satisfied, where V indicates a volume of the honeycomb structural body if the overall honeycomb structural body is composed of the high cell density section, Va indicates a volume of the high cell density section, Vb indicates a volume of the cell density section, and Vs indicates a volume of the boundary wall which separates the low cell density section from the cell density section formed immediately inside of the low cell density section.

Honeycomb shaped porous ceramic body, manufacturing method for same, and honeycomb shaped ceramic separation membrane structure

A separation membrane structure 1 has partition walls 3 including a honeycomb shaped porous ceramic body 9 provided with a large number of pores, and cells 4 to become through channels of a fluid are formed by the partition walls 3 . The cells 4 include separation cells 4 a and slit cells 4 b . In the separation cells 4 a , the intermediate layer is disposed on the surface of a substrate 30 , and a separation layer is further formed. The intermediate layer has a structure where aggregate particles are bonded to one another by an inorganic bonding material having a thermal expansion coefficient equal to or higher than that of the aggregate particles.

MONOLITHIC SEPARATION MEMBRANE STRUCTURE

A monolithic separation membrane structure () comprises a base material layer () and a first filtration layer (). The first filtration layer () contains an aggregate material having a principal component of alumina and an inorganic binder having a principal component of titania. The thickness of the first filtration layer () is less than 150 micrometers. 1. A monolithic separation membrane structure comprising:a base material layer composed of a porous material and including a plurality of through holes, anda tubular first filtration layer formed on an inner surface of the plurality of through holes, whereinthe first filtration layer contains an aggregate material having a principal component of alumina and an inorganic binder having a principal component of titania, andthe thickness of the first filtration layer is less than 150 micrometers.2. The monolithic separation membrane structure according to claim 1 , further comprising:a tubular second filtration layer formed on an inner surface of the first filtration layer, whereinthe second filtration layer contains an aggregate material having a principal component of titania.3. The monolithic separation membrane structure according to claim 1 , whereinthe base material layer contains an aggregate material having a principal component of alumina and an inorganic binder having a principal component of glass.4. The monolithic separation membrane structure according to claim 3 , whereinan average pore diameter of the first filtration layer is smaller than an average pore diameter of the base material layer.5. The monolithic separation membrane structure according to claim 2 , whereinthe base material layer contains an aggregate material having a principal component of alumina and an inorganic binder having a principal component of glass. The present invention relates to a monolithic separation membrane structure.A monolithic separation membrane structure is known which includes a base material layer that has a plurality ...

Catalytic extruded, solid honeycomb body

An extruded, solid honeycomb body comprises a copper-promoted, small pore, crystalline molecular sieve catalyst for converting oxides of nitrogen in the presence of a reducing agent, wherein the crystalline molecular sieve contains a maximum ring size of eight tetrahedral atoms, which extruded, solid honeycomb body comprising: 20-50% by weight matrix component comprising diatomaceous earth, wherein 2-20 weight % of the extruded, solid honeycomb body is diatomaceous earth; 80-50% by weight of the small pore, crystalline molecular sieve ion-exchanged with copper; and 0-10% by weight of inorganic fibres.

GYPSUM SLURRIES AND BOARDS AND METHODS OF MAKING THE SAME

A slurry for manufacturing gypsum board comprises calcined gypsum, water, a foaming agent, and a coalescing agent. The foaming agent imparts a plurality of bubbles in the slurry. Typically, a foam is pre-generated with the foaming agent and the foam is used to form the slurry such that the foam imparts the plurality of bubbles in the slurry. The coalescing agent coalesces the plurality of bubbles imparted by the foam. Typically, the coalescing agent coalesces a plurality of small and partially joined bubbles imparted by the foam to create larger and more discrete bubbles. A gypsum board and method of forming the slurry and the gypsum board are also disclosed. The gypsum board comprises a gypsum layer formed from the slurry. The gypsum layer defines a plurality of bubbles dispersed therein, which are imparted by the foam and coalescing agent of the slurry. 1. A gypsum board comprising a cover sheet and a gypsum layer disposed on said cover sheet , said gypsum layer defining a plurality of bubbles dispersed therein and comprising the reaction product of:calcined gypsum; andwater;{'sub': 1', '2, 'wherein an exothermic reaction occurs between said calcined gypsum and water, with said reaction product having a temperature ranging from an initial temperature (T) to a peak temperature (T) during formation;'}in the presence ofa foaming agent comprising a surfactant for creating a foam to impart a plurality of bubbles in said reaction product; and{'sub': CP', '1', '2, 'a coalescing agent comprising an alcohol alkoxylate and having a cloud point (T) from about 16.0 to about 60.0 C according to ADTM D2024 and that is between the initial temperature (T) and the peak temperature (T) of said reaction product, such that said coalescing agent coalesces the plurality of bubbles imparted by the foam thereby establishing the plurality of bubbles in said gypsum layer.'}2. (canceled)3. (canceled)4. A gypsum board as set forth in wherein said foaming agent and said coalescing agent are ...

Ceramic Surface Modification Materials and Methods of Use Thereof

Porous, binderless ceramic surface modification materials are described, and applications of use thereof. The ceramic material may include a metal oxide and/or metal hydroxide, and/or hydrates thereof, on a substrate surface. 1. A composition comprising a binderless porous ceramic material on a substrate.2. The composition according to claim 1 , wherein the porous ceramic material is primarily crystalline.3. The composition according to claim 1 , wherein the ceramic material comprises a metal oxide claim 1 , a hydrate of a metal oxide claim 1 , a metal hydroxide claim 1 , a layered double hydroxide claim 1 , and/or a hydrate of a metal hydroxide.4. (canceled)5. The composition according to claim 1 , wherein the ceramic material comprises a surface area of about 10 mto 1500 mper square meter of projected substrate area.6. (canceled)7. The composition according to claim 1 , wherein the ceramic material comprises a mean pore diameter of about 2 nm to about 20 nm.8. The composition according to claim 1 , wherein the pore size distribution is multimodal.9. The composition according to claim 1 , wherein the ceramic material comprises a thickness up to about 50 micrometers.1011.-. (canceled)12. The composition according to claim 1 , wherein the ceramic material comprises a porosity greater than about 10%.13. (canceled)14. The composition according to claim 1 , wherein the ceramic material comprises a void volume of about 100 mm/g to about 7500 mm/g as determined by mercury intrusion porosimetry.15. The composition according to claim 1 , wherein the substrate comprises aluminum claim 1 , an aluminum alloy claim 1 , a steel alloy claim 1 , an iron alloy claim 1 , zinc claim 1 , a zinc alloy claim 1 , copper claim 1 , a copper alloy claim 1 , nickel claim 1 , nickel alloys claim 1 , titanium claim 1 , titanium alloys claim 1 , glass claim 1 , a polymer claim 1 , a co-polymer claim 1 , or plastic.16. A composition according to claim 1 , wherein the ceramic material comprises a ...

SUPER HARD CONSTRUCTIONS & METHODS OF MAKING SAME

A superhard polycrystalline construction comprises a body of polycrystalline superhard material comprising a structure comprising superhard material, the structure having porosity greater than 20% by volume and up to around 80% by volume. A method of forming such a superhard polycrystalline construction comprises forming a skeleton structure of a first material having a plurality of voids, at least partially filling some or all of the voids with a second material to form a pre-sinter assembly, and treating the pre-sinter assembly to sinter together grains of superhard material to form a body of polycrystalline superhard material comprising a first region of superhard grains, and an interpenetrating second region; the second region being formed of the other of the first or second material that does not comprise the superhard grains; the superhard grains forming a sintered structure having a porosity greater than 20% by volume and up to around 80% by volume. 1. A super hard polycrystalline construction comprising a body of polycrystalline super hard material , the body of polycrystalline super hard material comprising a structure comprising super hard material , the structure having porosity greater than 20% by volume and up to around 80% by volume.2. The construction of claim 1 , further comprising one or more secondary phases located in one or more pores in the structure.3. The construction of wherein the one or more secondary phases comprise any one or more of a ceramic claim 2 , a metal alloy claim 2 , a hardmetal claim 2 , or a polymer.4. The construction of wherein the one or more secondary phases comprise any one or more of titanium claim 2 , alumina claim 2 , TiAlV claim 2 , or an alloy of cobalt and chrome.5. The construction of wherein the one or more secondary phases comprise an interpenetrating network through the super hard material.6. The construction of claim 5 , wherein the interpenetrating network is substantially continuous through the structure.7. ...

POROUS FIRED GRANULATED BODY AND METHOD FOR MANUFACTURING THE SAME

A porous fired granulated body is formed by consolidating numerous alumina particles to each other while letting mainly interconnected pores remain in network form across an entire cross section of a granulated body particle (). The pores () have an inner diameter controlled by a droplet diameter of a pore forming agent and have numerous precipitated alumina crystals () formed on inner surfaces thereof. Manufacture is performed by spraying the pore forming agent (emulsion) onto a raw material to form a coating layer of the pore forming agent on a surface of the raw material particle and controlling the inner diameter of the pores. A porous fired granulated body of alumina having a high specific surface area and having higher strength for the same specific surface area can thus be provided by a simple manufacturing method. 1. A porous fired granulated body , formed by consolidating numerous alumina particles to each other while letting mainly interconnected pores remain in network form across an entire cross section of a granulated body particle , and wherein the pores have an inner diameter controlled by a droplet diameter of a pore forming agent and have numerous precipitated alumina crystals formed on inner surfaces thereof.2. The porous fired granulated body according to claim 1 , wherein a content of a soda component (in terms of NaO; the same applies hereinafter) is less than 0.03%.3. The porous fired granulated body according to claim 1 , wherein a mean gap (arithmetic mean) of pores in the granulated body particle is adjusted to be in a range of 0.5 to 50 μm and a biaxial mean diameter (arithmetic mean of major diameters and minor diameters) of the precipitated alumina crystals is 0.1 to 5 μm.4. The porous fired granulated body according to claim 3 , wherein a mean particle diameter (median diameter) of the granulated body particle is 0.1 to 5 mm and a specific surface area (BET method) is 0.1 to 20 m/g.5. A method for manufacturing the porous fired ...

CARBON FOAM AND MANUFACTURING METHOD THEREOF

A carbon foam comprising linear portions and node portions joining the linear portions, wherein the linear portions have a diameter of 0.1 μm or more and 10.0 μm or less, and the carbon foam has a surface with an area of 100 cmor more. 1. A carbon foam comprising linear portions and node portions joining the linear portions , whereinthe linear portions have a diameter of 0.1 μm or more and 10.0 μm or less, and{'sup': '2', 'the carbon foam has a surface with an area of 100 cmor more.'}2. A carbon foam comprising linear portions and node portions joining the linear portions , whereinthe linear portions have a diameter of 0.1 μm or more and 10.0 μm or less, and{'sup': '2', 'the carbon foam has no through holes with an area of 2000 mmor more.'}3. The carbon foam according to claim 1 , wherein the carbon foam comprises a region of 4000 mmor more having no through holes with an area of 2000 mmor more.4. The carbon foam according to claim 1 , wherein a ratio of the number of the linear portions to the number of the node portions is 1.3 or more and 1.6 or less.5. The carbon foam according to claim 1 , having no through holes with an area of 1000 mmor more.6. The carbon foam according to claim 1 , wherein at least a part of the carbon foam has a density of the node portions of 15 claim 1 ,000/mmor more.7. The carbon foam according to claim 1 , having a bulk density of 3.0 kgmor more and 400 kgmor less.8. The carbon foam according to claim 1 , wherein the linear portions have a diameter of 0.1 μm or more and 5.0 μm or less.911-. (canceled)12. The carbon foam according to claim 1 , wherein at least a part of the carbon foam has a density of the node portions of 30 claim 1 ,000/mmor more.13. The carbon foam according to claim 1 , whereinin at least a part of the carbon foam, a thickness direction of the carbon foam is defined as x direction, a direction perpendicular to the x direction is defined as y direction, and a direction perpendicular to the x direction and the y ...

METHOD AND APPARATUS FOR IDENTIFYING VALID OR INVALID FLOW PATH

Method of identifying a valid flow path includes: performing fluid analysis of a porous body, which is ought to have inflow surface and outflow surface, based on structure data representing a 3-dimentional structure of the porous body to generate data indicating at least a pressure distribution of a fluid in a flow path in the porous body; and identifying a valid flow path that allows the fluid to flow from the inflow surface to the outflow surface based on a gradient of pressure values along a flow direction of the fluid in the flow path. 1. A method comprising:performing fluid analysis of a porous body, which is ought to have inflow surface and outflow surface, based on structure data representing a 3-dimentional structure of the porous body to generate data indicating at least a pressure distribution of a fluid in a flow path in the porous body; andidentifying a valid flow path that allows the fluid to flow from the inflow surface to the outflow surface based on a gradient of pressure values along a flow direction of the fluid in the flow path.2. The method of wherein the valid flow path is identified based on plural isobaric surfaces that have different pressure values along the flow direction of the fluid in the flow path.3. The method of wherein a cross-sectional area of the valid flow path is determined based on the isobaric surface.4. The method of wherein a volume of the valid flow path is determined based on the isobaric surfaces.5. The method of wherein a partial volume of the valid flow path is determined based on claim 2 , at least claim 2 , a distance between first and second isobaric surfaces in the flow direction of the fluid and an area of the first and/or second isobaric surface.6. The method of further comprising:determining a ratio of a sum of respective cross-sectional areas of the valid flow paths in a given cross-section of the porous body to a sum of respective cross-sectional areas of pores in the given cross-section of the porous body.7. ...

HONEYCOMB STRUCTURED BODY, EXHAUST GAS PURIFYING HONEYCOMB FILTER, AND EXHAUST GAS PURIFYING DEVICE

A honeycomb structured body includes a plurality of pillar-shaped honeycomb fired bodies and adhesive layers. The plurality of pillar-shaped honeycomb fired bodies each include cell walls provided along a longitudinal direction of the plurality of pillar-shaped honeycomb fired bodies to define cells. Each of the cells has a first end and a second end opposite to the first end along the longitudinal direction. Either the first end or the second end is sealed. The adhesive layers are provided between the plurality of pillar-shaped honeycomb fired bodies to bond the plurality of pillar-shaped honeycomb fired bodies. The adhesive layers include alumina fibers and inorganic balloons. The alumina fibers have an average length of about 25 μm to about 100 μm. The inorganic balloons have an average particle size of about 150 μm to about 250 μm. 1. A honeycomb structured body comprising:a plurality of pillar-shaped honeycomb fired bodies each comprising cell walls provided along a longitudinal direction of the plurality of pillar-shaped honeycomb fired bodies to define cells, each of the cells having a first end and a second end opposite to the first end along the longitudinal direction, either the first end or the second end being sealed; and alumina fibers having an average length of about 25 μm to about 100 μm; and', 'inorganic balloons having an average particle size of about 150 μm to about 250 μm., 'adhesive layers provided between the plurality of pillar-shaped honeycomb fired bodies to bond the plurality of pillar-shaped honeycomb fired bodies, the adhesive layers comprising2. The honeycomb structured body according to claim 1 ,wherein the alumina fibers have an aspect ratio of about 3 to about 30.3. The honeycomb structured body according to claim 1 ,wherein the adhesive layers further contain inorganic particles and an inorganic binder.4. The honeycomb structured body according to claim 1 ,wherein an amount of the inorganic balloons is about 5.0 vol % to about 50.0 ...

HONEYCOMB STRUCTURED BODY, EXHAUST GAS PURIFYING HONEYCOMB FILTER, AND EXHAUST GAS PURIFYING DEVICE

A honeycomb structured body includes a plurality of silicon carbide-based honeycomb fired bodies and adhesive layers. The plurality of silicon carbide-based honeycomb fired bodies each include silicon carbide particles and cell walls. The silicon carbide particles have a surface coated with a silicon-containing oxide layer. The cell walls are provided along a longitudinal direction of the plurality of silicon carbide-based honeycomb fired bodies to define cells. Each of the cells has a first end and a second end opposite to the first end along the longitudinal direction. Either the first end or the second end is sealed. The adhesive layers are provided between the plurality of silicon carbide-based honeycomb fired bodies to bond the plurality of silicon carbide-based honeycomb fired bodies. The adhesive layers include alumina fibers and inorganic balloons. 1. A honeycomb structured body comprising: silicon carbide particles having a surface coated with a silicon-containing oxide layer; and', 'cell walls provided along a longitudinal direction of the plurality of silicon carbide-based honeycomb fired bodies to define cells, each of the cells having a first end and a second end opposite to the first end along the longitudinal direction, either the first end or the second end being sealed; and, 'a plurality of silicon carbide-based honeycomb fired bodies each comprisingadhesive layers provided between the plurality of silicon carbide-based honeycomb fired bodies to bond the plurality of silicon carbide-based honeycomb fired bodies, the adhesive layers comprising:alumina fibers; andinorganic balloons.2. The honeycomb structured body according to claim 1 ,wherein the alumina fibers have an average length of about 25 μm to about 100 μm, andthe inorganic balloons have an average particle size of about 70 μm to about 300 μm.3. The honeycomb structured body according to claim 1 ,wherein the alumina fibers have an aspect ratio of about 3 to about 30.4. The honeycomb ...

DIE FOR EXTRUSION MOLDING, METHOD OF PRODUCING DIE FOR EXTRUSION MOLDING, AND METHOD OF PRODUCING HONEYCOMB STRUCTURED BODY

A die for extrusion molding includes a first face, a second face, a raw material supply section, a molding section, and a structure. The molding section has a second through hole that extends from the second face toward the first face so as to communicate with a first through hole. The structure is such that a material for the die is machined to form the material into a predetermined shape and to provide a machining-affected layer on an inner wall surface of the second through hole in the molding section, an oxidized layer is provided by heating the machining-affected layer to oxidize the machining-affected layer so as to convert the machining-affected layer into the oxidized layer, the oxidized layer is removed so that a treated surface is provided, and the treated surface is nitrided by ion implantation to provide a nitride layer. 1. A die for extrusion molding comprising:a first face;a second face provided opposite the first face;a raw material supply section having a first through hole that extends from the first face toward the second face; anda molding section having a second through hole that extends from the second face toward the first face so as to communicate with the first through hole; anda structure such that a material for the die is machined to form the material into a predetermined shape and to provide a machining-affected layer on an inner wall surface of the second through hole in the molding section, an oxidized layer is provided by heating the machining-affected layer to oxidize the machining-affected layer so as to convert the machining-affected layer into the oxidized layer, the oxidized layer is removed so that a treated surface is provided, and the treated surface is nitrided by ion implantation to provide a nitride layer.2. The die according to claim 1 ,wherein the raw material supply section further comprises a first opening provided at the first face and a second opening provided at a part where the second through hole communicates with ...

DIE FOR EXTRUSION MOLDING, METHOD OF PRODUCING DIE FOR EXTRUSION MOLDING, AND METHOD OF PRODUCING HONEYCOMB STRUCTURED BODY

A die for extrusion molding includes a first face, a second face, a raw material supply section, a molding section, and a treated surface. The second face is provided opposite the first face. The molding section has a second through hole that extends from the second face toward the first face so as to communicate with a first through hole. The treated surface is provided on an inner wall surface of the second through hole to have a structure such that a material for the die is machined to form the material into a die shape and to provide a machining-affected layer on the inner wall surface of the second through hole in the molding section, an oxidized layer is provided by heating the machining-affected layer to oxidize the machining-affected layer so as to convert the machining-affected layer into the oxidized layer, and the oxidized layer is removed. 1. A die for extrusion molding comprising:a first face;a second face provided opposite the first face;a raw material supply section having a first through hole that extends from the first face toward the second face; anda molding section having a second through hole that extends from the second face toward the first face so as to communicate with the first through hole; anda treated surface provided on an inner wall surface of the second through hole to have a structure such that a material for the die is machined to form the material into a die shape and to provide a machining-affected layer on the inner wall surface of the second through hole in the molding section, an oxidized layer is provided by heating the machining-affected layer to oxidize the machining-affected layer so as to convert the machining-affected layer into the oxidized layer, and the oxidized layer is removed.2. The die according to claim 1 ,wherein the raw material supply section further comprises a first opening provided at the first face and a second opening provided at a part where the second through hole communicates with the first through hole ...

METHOD FOR MATERIAL ADDITIVE MANUFACTURING OF AN INORGANIC FILTER SUPPORT AND RESULTING MEMBRANE

The present invention relates to a method for manufacturing at least one monolithic inorganic porous support () having a porosity comprised between 10% and 60% and an average pore diameter ranging from 0.5 μm to 50 μm, using a 3D printer type machine (I) to build, in accordance with a 3D digital model, a manipulable three-dimensional raw structure () intended to form, after sintering, the monolithic inorganic porous support(s) (). 11657421. A method for manufacturing monolithic inorganic porous support () having a porosity comprised between 10% and 60% and an average pore diameter ranging from 0.5 μm to 50 μm , using a 3D printing machine (I) including an extrusion head () movably mounted in space relative to and above a fixed horizontal plate () , said 3D printing machine allowing the deposition of a string () of inorganic composition () to build , from a 3D digital model (M) , a manipulable three-dimensional raw structure () intended to form the monolithic inorganic porous support(s) () , the method consisting of:{'b': '4', 'having the inorganic composition () including a powdery solid inorganic phase in the form of particles with an average diameter comprised between 0.1 μm and 150 μm, and a matrix,'}{'b': 6', '4', '7, 'sub': 'i,j', 'supplying the extrusion head () of the 3D printing machine (I) with the inorganic composition () and causing its extrusion to form the string (),'}{'b': 7', '5', '2, 'sub': 'i,j', 'building, using said string () on said horizontal plate (), the manipulable three-dimensional raw structure () in accordance with the 3D digital model (M),'}{'b': 2', '7, 'sub': 'i,j', 'accelerating the consolidation of the manipulable three-dimensional raw structure () in accordance with the 3D digital model (M) as the string () is extruded,'}{'b': '2', 'placing this manipulable three-dimensional raw structure () in a heat treatment furnace in order to carry out a sintering operation at a temperature comprised between 0.5 and 1 time the melting ...

METHODS OF MAKING PLUGGED HONEYCOMB BODIES WITH CEMENT PATTIES

A method of plugging a honeycomb body includes mixing a plugging mixture at a mixing temperature, wherein the plugging mixture comprises a plurality of inorganic particles, inorganic binder, organic binder, and water; dispensing the plugging mixture into a patty mold at a dispensing temperature; cooling the plugging mixture within the patty mold to a cooled temperature, such that a cement patty is formed; and pressing the cement patty into a plurality of channels in a honeycomb body, wherein the mixing temperature and the dispensing temperature are above a hydration point temperature of the organic binder in the plugging mixture, and the cooled temperature is below the hydration point temperature of the organic binder in the plugging mixture. 1. A method of forming a plugging cement patty , comprising:mixing a plugging mixture at a mixing temperature, the plugging mixture comprising a plurality of inorganic particles, an inorganic binder, an organic binder, and a liquid;dispensing the plugging mixture at a dispensing temperature; andcooling the plugging mixture to a cooled temperature to form the plugging cement patty, wherein the dispensing temperature is above a hydration point temperature of the organic binder in the plugging mixture and the cooled temperature is below the hydration point temperature of the organic binder in the plugging mixture.2. The method of claim 1 , wherein a viscosity of the plugging mixture at the mixing temperature is from about 1 cP to about 100 cP.3. (canceled)4. The method of claim 1 , wherein a viscosity of the plugging mixture at the dispensing temperature is from about 1 cP to about 100 cP.5. (canceled)6. The method of claim 1 , wherein a viscosity of the plugging mixture at the cooled temperature is from about 1 claim 1 ,500 claim 1 ,000 cP to about 10 claim 1 ,000 claim 1 ,000 cP.7. The method of claim 1 , wherein a viscosity of the plugging mixture at the cooled temperature is from about 3 claim 1 ,000 claim 1 ,000 cP to about 5 ...

BOP WATER FILTER CARTRIDGE

A water filter may include a diatomite-based ceramic filter having a median pore size greater than about 5 microns, and at least one of a halogen source, a UV source, an active carbon source, or a filtration membrane. A method of filtering water includes passing water from a source chamber through a diatomite-based ceramic filter having a median pore size greater than about 5 microns, and passing the water through at least one of a halogen source, an active carbon source, a UV source, or a filtration membrane to a collection chamber. The diatomite-based ceramic filter may further include bentonite. The water filter may include a biocide. The water filter may have a flow rate greater than about 5 L/hr when normalized to a surface area of 0.015 m. The water filter may reduce bacteria by greater than about 6-log. The halogen source may include a halogen elution system or a surface modification of the diatomite-based ceramic filter. 1. A water filter comprising:a diatomite-based ceramic filter having a median pore size greater than about 5 microns; andat least one of a halogen source, a UV source, an active carbon source, or a filtration membrane.2. (canceled)3. (canceled)4. The water filter of claim 1 , wherein the diatomite-based ceramic filter is disc-shaped.5. The water filter of claim 1 , wherein the diatomite-based ceramic filter is candle-shaped.6. The water filter of claim 1 , wherein the diatimote-based ceramic filter further comprises bentonite claim 1 ,7. The water filter of claim 1 , further comprising a biocide.8. The water filter of claim 7 , wherein the biocide comprises at least one of germicides claim 7 , bactericides claim 7 , fungicides claim 7 , algaeicides claim 7 , and drinking water disinfectants.9. The water filter of claim 7 , wherein the biocide comprises at least one silver acetate claim 7 , silver carbonate claim 7 , silver chloride claim 7 , silver copper zeolite claim 7 , silver fluoride claim 7 , silver iodide claim 7 , silver nitrate ...

DIE FOR EXTRUSION MOLDING, METHOD OF PRODUCING DIE FOR EXTRUSION MOLDING, EXTRUDER, AND METHOD OF PRODUCING HONEYCOMB STRUCTURED BODY

A die for extrusion molding includes a first face, a second face, a raw material supply section, and a molding section. The second face is provided opposite the first face. The raw material supply section includes a first through hole that extends from the first face toward the second face. The molding section includes a second through hole and a nitride layer. The second through hole extends from the second face toward the first face so as to communicate with the first through hole. The nitride layer is provided on an inner wall surface of the second through hole. 1. A die for extrusion molding comprising:a first face;a second face provided opposite the first face;a raw material supply section including a first through hole that extends from the first face toward the second face; and a second through hole extending from the second face toward the first face so as to communicate with the first through hole; and', 'a nitride layer provided on an inner wall surface of the second through hole., 'a molding section comprising2. The die according to claim 1 ,wherein the raw material supply section further comprises a first opening provided at the first face and a second opening provided at apart where the second through hole communicates with the first through hole, anda width of the raw material supply section decreases from the first opening toward the second opening.3. The die according to claim 1 ,wherein the molding section comprises slit grooves that communicate with a plurality of second through holes comprising the second through hole, the slit grooves connecting to one another to provide a lattice pattern.4. The die according to claim 1 ,wherein the raw material supply section further comprises a nitride layer provided on an inner wall surface of the first through hole.5. The die according to claim 1 ,wherein the nitride layer has a thickness of about 5 nm to about 1000 nm.6. The die according to claim 1 ,wherein the nitride layer has a hardness of about 1200 Hv ...

METHOD FOR CLOSED PORE CERAMIC

A method includes forming a ceramic member that has a plurality of closed pores within a ceramic matrix. The forming includes compacting a ceramic powder to form intra-particle pores between particles of the ceramic powder, and sintering the compacted ceramic powder to cause diffusion of the ceramic powder and formation of the ceramic matrix. The diffusion does not fill the intra-particle pores and leaves the closed pores. 1. A method comprising: compacting a ceramic powder to form intra-particle pores between particles of the ceramic powder, and', 'sintering the compacted ceramic powder to cause diffusion of the ceramic powder and formation of the ceramic matrix, wherein the diffusion does not fill the intra-particle pores and leaves the closed pores., 'forming a ceramic member that has a plurality of closed pores within a ceramic matrix, wherein the forming includes'}2. The method as recited in claim 1 , wherein the compacting compacts the ceramic powder to 40% to 60% theoretical density.3. The method as recited in claim 2 , wherein the compacting compacts the ceramic powder to about 50% theoretical density.4. The method as recited in claim 2 , wherein the ceramic matrix includes at least one of yttria stabilized zirconia claim 2 , zirconia claim 2 , hafnia claim 2 , gadolinia claim 2 , molybdenum disulphide claim 2 , alumina claim 2 , or mullite.5. The method as recited in claim 1 , wherein the ceramic member has 20 vol % to 80 vol % of the closed pores.6. The method as recited in claim 1 , wherein the ceramic member has 33 vol % to 66 vol % of the closed pores.7. The method as recited in claim 6 , wherein the ceramic matrix includes at least one of zirconia claim 6 , hafnia claim 6 , or gadolinia.8. The method as recited in claim 7 , wherein the sintering is partial sintering such that the ceramic powder is less than 100% sintered in the final ceramic member.9. The method as recited in claim 7 , wherein the sintering is partial sintering prior to the ceramic ...

SiC-NITRIDE OR SiC-OXYNITRIDE COMPOSITE MEMBRANE FILTERS

A filter for the filtration of a fluid includes or is composed of a support element made of a porous ceramic material, the element exhibiting a tubular or parallelepipedal shape including, in its internal portion, a set of adjacent channels separated from one another by walls of the porous inorganic material, in which at least a portion of the channels and/or the external surface are covered with a porous separating membrane layer for contacting the fluid to be filtered circulating in the channels and making possible the tangential or frontal filtration of the fluid. The layer is made of a material including a mixture of silicon carbide and of at least one compound chosen from silicon nitride or silicon oxynitride, the content by weight of elemental nitrogen, with respect to the content by weight of SiC in the material constituting the porous separating membrane layer, is between 0.02 and 0.15.

Method for aerogel production and aerogel composite material

The present invention relates to a method for aerogel production and to a composite material produced by said method and comprising an aerogel and mineral fibers. An aerogel material produced on the basis of silicate with a coefficient of thermal conductivity of <18 mW/mK is obtainable by rendering it hydrophobic with HMDSO in the presence of nitric acid.

BORON NITRIDE MATERIAL AND METHOD OF PREPARATION THEREOF

A method of preparing a boron nitride material, such as boron nitride (BN) or boron carbonitride (BCN), is provided. The method may include providing a substrate, and sublimating an amine borane complex onto the substrate to obtain the boron nitride material. The amine borane complex may include, but is not limited to, borazine, amino borane, trimethylamine borane and triethylamine borane. In addition, the temperature at which the sublimating is carried out may be varied to control composition of the boron nitride material formed. In addition, various morphologies can be obtained by using the present method, namely films, nanotubes and porous foam. 1. A method of preparing a boron nitride material , the method comprisingproviding a substrate, andsublimating an amine borane complex onto the substrate to obtain the boron nitride material, wherein temperature at which the sublimating is carried out is varied to control composition of the boron nitride material formed.2. The method according to claim 1 , wherein the boron nitride material is a boron nitride nanotube.3. The method according to claim 2 , wherein providing the substrate comprises providing a substrate having a layer of a metal in discrete particulate form arranged on a support.4. The method according to claim 2 , wherein providing the substrate comprises providing a substrate having one or more carbon nanotubes.5. The method according to claim 4 , further comprising removing the one or more carbon nanotubes by annealing the substrate following sublimating of the amine borane complex onto the substrate in an environment containing oxygen at a temperature in the range of about 400° C. to about 700° C.6. (canceled)7. The method according to claim 1 , wherein providing the substrate comprises providing a layer of a metal arranged on a porous support to form the boron nitride material as a porous boron nitride material.8. The method according to claim 7 , further comprising removing the substrate by subjecting ...

SILICA MOLDED BODIES HAVING LOW THERMAL CONDUCTIVITY

Hydrophobic shaped silica bodies having low density and low thermal conductivity are produced by forming a dispersion of silica in a solution of binder and organic solvent, and removing the solvent and shaping to form a shaped body. The shaped bodies retain their hydrophobicity, are stable with regards to shape, and are useful in acoustic and thermal insulation. 17.-. (canceled)8. A process for producing shaped silica bodies having a C content of less than 8% by weight ,{'sup': '3', 'a density, determined by Hg porosimetry, of less than 0.30 g/cm,'}{'sup': '3', 'a pore volume for pores smaller than 4 μm, determined by Hg porosimetry, of more than 2.0 cm/g,'}a proportion of the pores smaller than 4 μm, based on the total pore volume, of at least 60% anda thermal conductivity, determined by a non-steady-state method, of less than 30 mW/K*m, i) producing a dispersion containing silica, at least one binder and an organic solvent, and', 'ii) evaporating the solvent from the dispersion, and shaping to form the shaped silica bodies., 'comprising9. The process of claim 8 , wherein hydrophilic silica or a mixture of hydrophilic silica and partially hydrophobic silica is as the silica.10. The process of claim 8 , wherein silanes containing a C-C-alkyl group claim 8 , Calkenyl group claim 8 , methoxy group claim 8 , ethoxy group claim 8 , or a mixture thereof are used as a binder.11. The process of claim 8 , wherein at least one solvent is selected from the group consisting of alkanes claim 8 , ethers claim 8 , alcohols claim 8 , and mixtures thereof.12. A shaped silica body produced by the process of .13. Acoustic or thermal insulation comprising shaped silica bodies of . This application is the U.S. National Phase of PCT Appln. No. PCT/EP2016/078739 filed Nov. 24, 2016, which claims priority to PCT Application No. PCT/EP2015/077854 filed Nov. 26, 2015, the disclosures of which are incorporated in their entirety by reference herein.The invention relates to high-viscosity ...

Acoustically active articles

Articles and methods of making and using the articles are provided. The articles include inorganic agglomerates having an average dimension in a range from about 50 microns to about 2 mm. The porous agglomerates each include a network of carbon or silica, and metal oxide particles embedded in the network. Some agglomerates are capable of lowering a resonant frequency of an acoustic device when the resonant frequency is in a range from about 50 Hz to about 1500 Hz.