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Применить Всего найдено 4. Отображено 4.
24-04-2013 дата публикации

Two-step solid-phase synthesis method of pure-phase LaNiMnO6 powder

Номер: CN103058285A
Автор: Cao Zhenzhu, Chen Hao, Wang Liying, Gao Zhi, Wang Hongwei
Принадлежит:

The invention discloses a two-step solid-phase synthesis method of pure-phase LaNiMnO6 (LNMO) powder, belonging to the technical field of high-performance functional ceramic powder. The LNMO ceramic has a magnetic dielectric effect, a magnetoresistance effect and an adjustable dielectric performance and has important application in the field of preparation of functional devices. According to the invention, the solid-phase synthesis method is adopted to prepare a sample through two steps; and the two-step synthesis method can efficiently solve the difficulty that mixed phases of La2NiO4 and NiO are extremely easy to occur in the traditional one-step solid-phase synthesis process. The two-step solid-phase synthesis method of the pure-phase LaNiMnO6 (LNMO) powder, disclosed by the invention, has the advantages of a simple preparation process, low cost of raw materials, and high purity as well as good crystallinity of the obtained powder. Therefore, the LNMO solid powder can be produced in ...

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Номер записи: 1
01-08-2012 дата публикации

Stibonium-doped quasi garnet-structured lithium ion crystalline-state solid electrolyte material and synthesis method thereof

Номер: CN102617140A
Автор: Cao Zhenzhu, Ren Wei, Liu Jinrong, Gao Yanfang, He Weiyan, Dong Hongying
Принадлежит:

The invention provides a novel quasi garnet-structured lithium ion conductor (Li7-xLa3Zr2-xSbxO12, wherein x is more than 0 and less than or equal to 0.5) crystalline-state ceramic solid electrolyte material and a synthesis method thereof, and belongs to the field of lithium ion batteries. A novel quasi garnet-structured lithium ion conductor is synthesized by conventional solid-phase reaction. X-ray diffraction (XRD) diffraction peaks of Sb-doped samples show that the Sb-doped samples all have crystalline -state cubic phase quasi garnet-structures in the Sb doped range. The maximum lithium ion conductivity can reach 3.42*10<-4>S/cm at room temperature (30 DEG C). The sample is synthesized by the conventional solid phase method, a preparation process is simple, and sintering time is short. Zr is partially replaced by high-valence Sb, so the lithium ion vacancy is increased, the ionic conductivity is improved obviously, and antimonous oxide is low in price compared with zirconia, so manufacturing ...

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Номер записи: 2
22-07-2015 дата публикации

Preparation method of controllable-shape nano zirconium oxide

Номер: CN104787802A
Автор: He Weiyan, Liu Jinrong, Cao Zhenzhu
Принадлежит:

The invention provides a preparation method of monodisperse zirconium oxide in different shapes, belonging to the field of preparation of nano materials. The preparation method is characterized in that a template process is utilized to determine the proportion in the SDS/Tritionx-100/H2O system, and the concentration of the reactants is regulated to control the shape of the prepared nano powder. The method comprises the following steps: (1) determining the single-phase region of the SDS/Tritionx-100/H2O system; substituting water in the three-element system by using 0.5-2 mol/L zirconium oxychloride and 1-13 mol/L, thoroughly mixing, keeping the temperature at 25 DEG C for 1-24 hours, washing with ethanol and water, and centrifuging several times until the washing solution is neutral; and drying at 50-80 DEG C to obtain the powder, calcining at 500-700 DEG C for 2 hours to obtain the nano zirconium oxide in different shapes. By adopting the template process, the reactant concentration is ...

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Номер записи: 3
25-09-2013 дата публикации

Zirconium-doped modified La2NiMnO6 ceramic dielectric adjustable material and preparation method thereof

Номер: CN103319179A
Автор: Cao Zhenzhu, Li Zhi, Gao Yanfang, Wang Liying, Liu Jinrong, He Weiyan
Принадлежит:

The invention provides a novel dielectric adjustable material and a synthesizing method thereof. The material has a chemical formula of La2NiMn1-xZrxO6 (x is no smaller than 0 and no greater than 0.2). According to the invention, with a gel-combustion method, powder is synthesized, and is sintered, such that the novel dielectric adjustable material is obtained. After Zr doping, a sample XRD diffraction result shows that the structures of all samples are monoclinic phases in a Zr doping range. Quality factors of the modified ceramic material are improved compared to those of La2NiMn06 under room temperature. Especially, the quality factors of La2NiMn0.84Zr0.16O6 under a temperature of 25 DEG C, a bias electric field of 40V/cm and a frequency of 2kHz are improved by more than 5 times that of La2NiMn06. Further, sample dielectric adjustable rate at approximately room temperature is still higher than 60%. Therefore, the dielectric adjustable material provided by the invention provides a basis ...

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Номер записи: 4