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无机材料学报

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原位氮化法制备纳米TiN-Al2O3复合粉体

李景国; 高濂; 郭景坤   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室 上海 200050
  • 收稿日期:2001-05-30 修回日期:2001-08-16 出版日期:2002-05-20 网络出版日期:2002-05-20

In-Situ Nitridation Synthesis of TiN-Al2O3 Composite Nanopowders

LI Jing-Guo; GAO Lian; GUO Jing-Kun   

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050; China
  • Received:2001-05-30 Revised:2001-08-16 Published:2002-05-20 Online:2002-05-20

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摘要： 以化学共沉淀法制备的纳米ＴｉＯ２－Ａｌ２Ｏ３复合粉体为原料,采用原位选择性氮化的方法制备了纳米ＴｉＮ－Ａｌ２Ｏ３复合粉体．应用化学热力学原理分析、计算了氮化反应的条件和机理,研究了氮化条件对氮化反应的影响．实验结果表明,氮化反应在７００℃时开始进行,在９００℃保温５ｈ,氮化反应进行完全,ＴＥＭ照片显示纳米ＴｉＮ 颗粒均匀分布于Ａｌ２Ｏ3基体中,粒径为５０～７０ｕｍ．

关键词: 氮化钛, 氧化铝, 原位氮化, 纳米粉

Abstract: Nano TiN-Al2O3 composite powders were prepared by in-situ nitridation using nano TiO2-Al2O3 powders prepared by a coprecipitation method as starting
material. The nitridation conditions and mechanism were calculated and analyzed by using thermodynamic principle. The effect of nitridation reaction conditions
on nitridation reaction was studied. Experimental results show that the nitridation reaction begins at 700℃ and completes at 900℃ for 5h. TEM
micrographs show that nano TiN particles are dispersed into Al2O3 matrix. The size of nano TiN particles is about 50～70nm.

Key words: titanium nitride, alumina, In-Situ nitridation, nanopowders

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