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无机材料学报

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纳米Ti0.8Cr0.2OxNy粉体的制备与表征

李耀刚; 高濂   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室 上海 200050

  • 收稿日期:2002-06-26 修回日期:2002-08-16 出版日期:2003-07-20 网络出版日期:2003-07-20

Synthesis and Characterization of the Nanocrystalline Ti0.8Cr0.2OxNy Powder

LI Yao-Gang; GAO Lian   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China

  • Received:2002-06-26 Revised:2002-08-16 Published:2003-07-20 Online:2003-07-20

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摘要：

以沉淀法制备的纳米TiO2/Cr2O3复合粉体为原料,采用氨解法在800℃、氮化8h制备了纳米Ti0.8Cr0.2OxNy粉体。对纳米TiO2/Cr2O3复合粉体和合成的氧氮化物粉体用俄歇电子能谱(AES)、氮吸附比表面积(BET)、X射线衍射(XRD)、透射电子显微镜(TEM)、电子探针显微分析(EPMA)等方法进行了表征。结果表明:沉淀法可以制备出组成均匀的纳米TiO2/Cr2O3复合粉体,该复合粉体在800℃氮化8h可得到粒度为20～30nm的纯立方相Ti0.8Cr0.2OxNy纳米粉体,其比表面积达4674m2/g。

关键词: TiO2/Cr2O3, 氨解, 氧氮化物, 纳米粉体

Abstract:

Nanocrystalline bimetallic metal oxynitride, Ti0.8Cr0.2OxNy, was synthesized by ammonolysis of
the nanosized Cr2O3/TiO2 composite powder at 800℃ for 8h. The precursor and the resulting oxynitride were characterized by Auger
electron spectroscope (AES), X-ray diffraction analysis (XRD), electron probe microanalysis (EPMA), transmission electron microscopy (TEM), and
BET surface area techniques. The results indicate that the as-synthesized oxynitride powder contains only Ti0.8Cr0.2OxNy with cubic
structure and its average particle size is 20～30nm, its specific surface area reaches 46.74m2/g.

Key words: TiO2/Cr2O3, ammonolysis, oxynitride, nanosized powder

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