碳热还原氮化法制备β′-Sialon粉体的热力学过程

无机材料学报

碳热还原氮化法制备β′-Sialon粉体的热力学过程

都兴红; 隋智通; 张广荣

东北大学材料与冶金学院; 沈阳110006

收稿日期:1997-08-25 修回日期:1997-10-05 出版日期:1998-08-10 网络出版日期:1998-08-10

Thermodynamic of Synthesizing β -sialon Powders by Carbothermal Reaction and Nitration

DU Xing-Hong; SUI Zhi-Tong; ZHANG Guang-Rong

School of Materials and Metallurgy; Northeastern University Shenyang 110006 China

Received:1997-08-25 Revised:1997-10-05 Published:1998-08-10 Online:1998-08-10

摘要/Abstract

摘要： 本文分析了以天然高岭土为原料，经碳热还原氨化反应制备β′-Sialon粉体过程中出现的化学反应，从热力学角度研究了反应温度及气体分压对产物组成的影响，通过实验结果与热力学分析相结合，寻找出制约反应进行的速度控制步骤，并讨论了获得较高β′-Sialon粉体转化率所需的温度范围．

关键词: β′-Sialon粉体, 还原氮化, 热力学过程

Abstract: It was analyzed that the chemistry reaction occured in the process of carbothermal reaction and nitration of natural Kaolin. The influence of temperature and gas pressure on the product composition was studied in thermodynamics. The speed controlling step was discovered by combining the experimental results and theoretic calculation. The favourite temperature was discussed for acquiring more β -Sialon powders.

Key words: β -Sialon powders, reaction and nitration, thermodynamic process

中图分类号:

TF123

都兴红,隋智通,张广荣. 碳热还原氮化法制备β′-Sialon粉体的热力学过程[J]. 无机材料学报.

DU Xing-Hong,SUI Zhi-Tong,ZHANG Guang-Rong. Thermodynamic of Synthesizing β -sialon Powders by Carbothermal Reaction and Nitration[J]. Journal of Inorganic Materials.

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