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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 8. Отображено 8.
25-09-2017 дата публикации

LEAD-FREE PIEZOELECTRIC CERAMIC COMPOSITION WITH EXCELLENT ELECTRIC FIELD-INDUCED STRAIN PROPERTY, AND METHOD FOR PRODUCING SAME

Номер: KR1020170107410A
Автор: LEE, JAE SHIN, LEE, CHANG HEON, DINH THI HINH, KANG, JIN KYU, CHO, JEONG HO, JEONG, SOON JONG
Принадлежит:

The present invention relates to a lead-free piezoelectric ceramic composition with excellent electric field-induced strain property, and a method for producing the same, and more particularly, to a lead-free piezoelectric ceramic composition having a composition of (1-x-y)Bi_(1/2)Na_(1/2)TiO_3-xSrTiO_3+yBiFeO_3 or (1-x-z)Bi_(1/2)Na_(1/2)TiO_3-xSrTiO_3+zLaFeO_3. According to the present invention, the lead-free piezoelectric ceramic composition exhibits excellent electric field-induced strain property even under low electric field conditions of 4 kV/mm or less, thereby being applicable to a piezoelectric application device in various fields including the field of piezoelectric actuators, by replacing an existing lead zirconate titanate (PZT)-based piezoelectric material. In particular, the lead-free piezoelectric ceramic composition of the present invention may be applicable to fields which require a compact and high precision configuration. COPYRIGHT KIPO 2017 (AA) Strain rate (%) (BB) ...

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Номер записи: 1
01-02-2016 дата публикации

Lead-free piezoelectric ceramic composition and Preparation method thereof

Номер: KR0101590703B1
Автор: 이재신, 김일원, 안창원, 강진규, 홍창효, 이현영, 딘치힌, 허대준
Принадлежит: 울산대학교 산학협력단

... 본 발명은 무연 압전 세라믹 조성물 및 이의 제조방법에 관한 것이다. 본 발명에 따른 무연 압전 세라믹 조성물은, 납을 포함하지 않아 환경친화적일 뿐만 아니라, 매질 역할을 수행하는 완화형 강유전체에 강유전체 입자가 분산된 구조를 가짐으로써 4 kV/mm 이하의 낮은 전계 조건에서도 전계유기 변형률이 우수하므로, 압전 소재가 사용되는 다양한 분야의 압전 응용 소자에 유용하게 사용될 수 있다.

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Номер записи: 2
07-06-2016 дата публикации

LEAD-FREE PIEZOELECTRIC CERAMIC COMPOSITION AND METHOD OF PREPARING SAME

Номер: KR1020160063647A
Автор: LEE, JAE SHIN, KANG, JIN KYU, DINH THI HINH, HEO, DAE JUN
Принадлежит:

The present invention relates a lead-free piezoelectric ceramic composition and a method of preparing the same. A lead-free piezoelectric ceramic composition according to the present invention does not include any lead, so that the lead-free piezoelectric ceramic composition is echo-friendly. The lead-free piezoelectric ceramic composition uses relaxer ferroelectrics having a uniform particle size and a narrow range of particle size distribution as a medium, so that the density is high. In addition, the lead-free piezoelectric ceramic composition has a structure in which ferroelectric particles are distributed into the medium, so that the electric-field induced property is excellent. Further, since the lead-free piezoelectric ceramic composition is prepared through high-energy ball-milling treatment, it is easy to control the process time and temperature, so that the process efficiency and cost are improved. COPYRIGHT KIPO 2016 (AA) Processing hours (min) ...

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Номер записи: 3
01-11-2016 дата публикации

LEAD-FREE PIEZOELECTRIC CERAMIC COMPOSITION, AND PREPARATION METHOD THEREOF

Номер: KR101671672B1
Автор: LEE, JAE SHIN, THI HINH DINH, KANG, JIN KYU, HOANG THIEN KHOI NGUYEN, LEE, CHANG HEON, TRANG AN DUONG, KIM, SEONG DEOK, CHO, JEONG HO, JEONG, SOON JONG
Принадлежит: UNIVERSITY OF ULSAN FOUNDATION FOR INDUSTRY COOPERATION

The present invention provides lead-free piezoelectric ceramic composition, and a preparation method thereof. According to the present invention, the lead-free piezoelectric ceramic composition has a structure in which the bismuth-based ferroelectric particles represented by any one selected from a group consisting of chemical formula 3 or 5 is dispersed in a specific content range in the bismuth-based ferroelectric particles represented by chemical formula 1 or 2 bismuth-based ferroelectric so as to be environmentally friendly due to excluding a lead. The present invention has an excellent electric field organic variation ratio in low electric field condition of 4 kV/mm or less, thereby being used in various fields of piezoelectric applications in which piezoelectric materials are used. COPYRIGHT KIPO 2016 (AA) Variation ratio (%) (BB) Electric field (kV/mm) (CC) Driving electric field ...

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Номер записи: 4
09-01-2018 дата публикации

METHOD OF PRODUCING LEAD-FREE PIEZOELECTRIC CERAMIC WITH HIGH ELECTRIC-FIELD-INDUCED STRAIN

Номер: KR1020180003277A
Автор: LEE, JAE SHIN, KANG, JIN KYU, LEE, CHANG HEON, NGUYEN HOANG THIEN KHOI, DINH THI HINH, DUONG TRANG AN
Принадлежит:

The present invention relates to a method of producing lead-free piezoelectric ceramic with a high electric-field-induced strain and, more specifically, to a method of producing lead-free piezoelectric ceramic having a composition expressed by (1-x)Bi_(1/2)Na_(1/2)TiO_3-xSrTiO_3 by mixing two powders of different SrTiO_3 contents with bismuth (Bi)-based piezoelectric ceramic. The lead-free piezoelectric ceramic produced according to the present invention exhibits excellent electric-field-induced strain characteristics even in a low electric field of 4 kV/mm, and thus may be applied to piezoelectric devices of various fields including a piezoelectric actuator instead of conventional PZT-based piezoelectric material, in particular, to a field where miniaturization and high precision are required. COPYRIGHT KIPO 2018 (AA) Synthesizing first ceramic powder (BB) Synthesizing second ceramic powder (CC) Mixing (DD) Forming (EE) Sintering ...

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Номер записи: 5
30-11-2016 дата публикации

무연 압전 세라믹 조성물 및 이의 제조방법

Номер: KR0101681386B1
Автор: 이재신, 강진규, 딘치힌, 허대준
Принадлежит: 울산대학교 산학협력단

... 본 발명은 무연 압전 세라믹 조성물 및 이의 제조방법에 관한 것이다. 본 발명에 따른 무연 압전 세라믹 조성물은, 납을 포함하지 않아 환경친화적일 뿐만 아니라, 입도가 균일하여 입도 분포가 좁은 완화형 강유전체를 매질로 사용하여 치밀도가 높고, 상기 매질에 강유전체 입자가 분산된 구조를 가져 전계유기 특성이 우수하다. 또한, 고에너지 볼 밀링법(high energy ball-milling treatment)을 통하여 제조되므로 공정시간, 공정온도 등의 제어가 용이하여 공정효율 및 공정비용이 개선되는 이점이 있다.

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Номер записи: 6
20-11-2015 дата публикации

LEAD-FREE PIEZOELECTRIC CERAMIC COMPOSITION AND PRODUCTION METHOD THEREOF

Номер: KR1020150129389A
Автор: LEE, JAE SHIN, KIM, ILL WON, AHN, CHANG WON, KANG, JIN KYU, HONG, CHANG HYO, LEE, HYUN YOUNG, DINH THI HINH, HEO, DAE JUN
Принадлежит:

The present invention relates to a lead-free piezoelectric ceramic composition and a production method thereof. According to the present invention, the lead-free piezoelectric ceramic composition is eco-friendly by not containing lead, and has a structure in which ferroelectric particles are dispersed on a relaxed-type ferroelectric material functioning as a medium, thereby having excellent electric-field-induced deformation rate in a low electric field less than or equal to 4 kV/mm. Moreover, the composition can be useful for a piezoelectric application device in various fields where piezoelectric materials are used. COPYRIGHT KIPO 2016 ...

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Номер записи: 7
14-06-2018 дата публикации

전계유기 변형 특성이 우수한 무연 압전 세라믹 조성물 및 이의 제조방법

Номер: KR0101866845B1
Автор: 이재신, 이창헌, 딘치힌, 강진규, 조정호, 정순종
Принадлежит: 울산대학교 산학협력단, 한국세라믹기술원, 한국전기연구원

... 본 발명은 전계유기 변형 특성이 우수한 무연 압전 세라믹 조성물 및 이의 제조방법에 관한 것으로서, 보다 상세하게는 (1-x-y)Bi1/2Na1/2TiO3-xSrTiO3+yBiFeO3또는 (1-x-z)Bi1/2Na1/2TiO3-xSrTiO3+zLaFeO3의 조성을 갖는 무연 압전 세라믹 조성물 및 이의 제조방법에 관한 것이다. 본 발명에 따른 무연 압전 세라믹 조성물은, 4 kV/mm 이하의 낮은 전계 조건에서도 우수한 전계유기 변형 특성을 나타냄으로써 종래의 PZT계 압전 소재를 대체하여 압전 액츄에이터 분야를 비롯한 다양한 분야의 압전 응용 소자에 적용가능하며, 특히 소형화 및 고정밀도가 요구되는 분야에도 적용가능성을 나타낼 수 있다.

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Номер записи: 8