Sintering Properties of ZrO2(MexOy) Fine Powders Produced by Different Methods

IF 0.4 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Russian Physics Journal Pub Date : 2024-08-23 DOI:10.1007/s11182-024-03219-9

X. Yang, A. G. Burlachenko, S. P. Buyakova

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引用次数: 0

Abstract

This work explores compaction of fine ZrO₂ powders doped with Y₂O₃ and MgO. ZrO₂(Me_xO_y) powders are obtained by plasma chemical synthesis and chemical precipitation from salt solutions. Powder compaction is studied during the nonisothermal sintering process. It is shown that the ZrO₂(Y₂O₃) powder synthesized by chemical precipitation demonstrates the lowest degree of compaction during sintering. With the same synthesis method and similar size distribution of ZrO₂(Me_xO_y) powders, the difference in the compaction kinetics is determined by the different number of oxygen vacancies. The higher number of oxygen vacancies in the ZrO₂(MgO) powder obtained by plasma chemical synthesis, provides the highest compaction rate compared to the ZrO₂(Y₂O₃) powder. According to mercury porosimetry, ZrO₂(Y₂O₃) powders of the same composition obtained by plasma chemical synthesis and chemical precipitation, have very different porosity. The highest compaction rate for all compacts is observed at the heating stage. After sintering, ZrO₂(Y₂O₃) ceramic samples show similar values of compaction rate. Research findings may be useful to specialists involved in the development and synthesis of fine ceramic powders.

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不同方法制备的 ZrO2（MexOy）细粉的烧结性能

这项研究探讨了掺杂 Y2O3 和氧化镁的氧化锆粉末的压实问题。ZrO2(MexOy) 粉末是通过等离子化学合成和盐溶液化学沉淀获得的。在非等温烧结过程中对粉末压实进行了研究。结果表明，通过化学沉淀合成的 ZrO2（Y2O3）粉末在烧结过程中的压实度最低。在合成方法相同、ZrO2(MexOy)粉末粒度分布相似的情况下，氧空位数量的不同决定了压实动力学的差异。与 ZrO2（Y2O3）粉末相比，通过等离子化学合成获得的 ZrO2（MgO）粉末中氧空位的数量较多，因此压实速率最高。根据汞孔测定法，通过等离子体化学合成和化学沉淀获得的相同成分的 ZrO2（Y2O3）粉末的孔隙率差别很大。所有压实物的最高压实率都出现在加热阶段。烧结后，ZrO2(Y2O3) 陶瓷样品显示出相似的压实率值。研究结果可能对开发和合成精细陶瓷粉末的专家有所帮助。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Russian Physics Journal PHYSICS, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

50.00%

发文量

208

审稿时长

3-6 weeks

期刊介绍： Russian Physics Journal covers the broad spectrum of specialized research in applied physics, with emphasis on work with practical applications in solid-state physics, optics, and magnetism. Particularly interesting results are reported in connection with: electroluminescence and crystal phospors; semiconductors; phase transformations in solids; superconductivity; properties of thin films; and magnetomechanical phenomena.