Methods for Synthesis of PbIn1/2Ta1/2O3 with the Perovskite Structure

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
A. A. Gusev, I. P. Raevski
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引用次数: 0

Abstract

We have studied the effect of mechanical activation on the synthesis of lead indium tantalate and the formation of the perovskite and pyrochlore phases during both mechanochemical synthesis and subsequent firing. To reduce the electrical conductivity of resulting ceramics, lithium carbonate was added to starting mixtures, which is known to stabilize the perovskite structure. PbIn1/2Ta1/2O3 samples were prepared in the presence of 1–3 wt % superstoichiometric lithium carbonate at firing times from 30 min to 2 h. We have found conditions that ensure the preparation of single-phase material with the perovskite structure in the presence of lithium carbonate additions at different firing temperatures. The sequence in which reagents are introduced into the starting mixture and their activation have been shown to have a significant effect on the synthesis of the tantalate and the formation of the perovskite phase. We have compared a number of sample preparation procedures differing in mechanical activation conditions and the way in which the starting materials are introduced. Optimal conditions have been found which ensure the preparation of piezoceramics containing the maximum amount of the perovskite phase and having the highest density.

Abstract Image

钙钛矿结构PbIn1/2Ta1/2O3的合成方法
我们研究了机械活化对钽酸铅铟合成的影响,以及在机械化学合成和随后的烧制过程中钙钛矿和焦绿石相的形成。为了降低所得陶瓷的导电性,在起始混合物中加入碳酸锂,这是已知的稳定钙钛矿结构的物质。PbIn1/2Ta1/2O3样品在1-3 wt %的超化学碳酸锂的存在下,在30分钟至2小时的烧制时间内制备。我们发现了在不同的烧制温度下,在碳酸锂的存在下,保证制备具有钙钛矿结构的单相材料的条件。将试剂引入起始混合物的顺序及其活化对钽酸盐的合成和钙钛矿相的形成有重要影响。我们比较了几种不同的机械活化条件和起始材料引入方式的样品制备程序。找到了制备钙钛矿相含量最多、密度最高的压电陶瓷的最佳工艺条件。
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来源期刊
Inorganic Materials
Inorganic Materials 工程技术-材料科学:综合
CiteScore
1.40
自引率
25.00%
发文量
80
审稿时长
3-6 weeks
期刊介绍: Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.
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