合成 Bi2Cr0.5Co0.5Nb2O9+∆ 纳米晶陶瓷

IF 0.6 4区 材料科学 Q4 MATERIALS SCIENCE, CERAMICS
K. A. Badanina, R. I. Korolev, B. A. Makeev, N. A. Zhuk
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引用次数: 0

摘要

经改良的溶胶-凝胶法(Pechini 法)可在铌酸铋的基础上合成多元素氧化物,这种氧化物的结晶为热绿石结构(空间群 Fd-3m)。合成单相样品的温度为 950°C,比传统陶瓷合成法的煅烧温度低 100°C。根据烧结温度的不同,用射线测定的平均晶粒大小从 39 纳米(850°C)到 48 纳米(1050°C)不等。X 射线衍射分析表明,单胞参数等于 10.4872(6)埃。元素图谱显示,样品表面的金属原子分布均匀,而能量色散 X 射线分析表明,合成样品的化学成分符合规定的理论成分。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Synthesis of Bi2Cr0.5Co0.5Nb2O9+∆ Nanocrystalline Ceramics

Synthesis of Bi2Cr0.5Co0.5Nb2O9+∆ Nanocrystalline Ceramics

The modified sol-gel method (Pechini method) is shown to synthesize multielement oxides on the basis of bismuth niobate that crystallize in the pyrochlore structure (space group Fd-3m). The temperature for the synthesis of a single-phase sample amounts to 950°C, which is 100°C lower than the calcination temperature used in the conventional ceramic method of synthesis. The average crystallite size determined radiographically varies from 39 nm (850°C) to 48 nm (1050°C) depending on the sintering temperature. According to x-ray diffraction analysis, the unit cell parameter is equal to 10.4872(6) Å. The conducted elemental mapping indicates a uniform distribution of metal atoms on the sample surface, while energy dispersive x-ray analysis shows that the chemical composition of the synthesized sample corresponds to the specified theoretical composition.

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来源期刊
Glass and Ceramics
Glass and Ceramics 工程技术-材料科学:硅酸盐
CiteScore
1.00
自引率
16.70%
发文量
85
审稿时长
6-12 weeks
期刊介绍: Glass and Ceramics reports on advances in basic and applied research and plant production techniques in glass and ceramics. The journal''s broad coverage includes developments in the areas of silicate chemistry, mineralogy and metallurgy, crystal chemistry, solid state reactions, raw materials, phase equilibria, reaction kinetics, physicochemical analysis, physics of dielectrics, and refractories, among others.
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