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无机材料学报

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负热膨胀ZrW1.7Mo0.3O8粉体的水热合成研究

刘芹芹, 杨娟, 孙秀娟, 程晓农   

  1. 江苏大学材料科学与工程学院, 镇江 212013
  • 收稿日期:2006-01-23 修回日期:2006-05-08 出版日期:2007-01-20 网络出版日期:2007-01-20

Hydrothermal Synthesis of Negative Thermal Expansion Material ZrW1.7Mo0.3O8 Powder

LIU Qin-Qin, YANG Juan, SUN Xiu-Juan, CHENG Xiao-Nong   

  1. School of Material Science and Engineering, Jiangsu University,
    Zhenjiang 212013, China
  • Received:2006-01-23 Revised:2006-05-08 Published:2007-01-20 Online:2007-01-20

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摘要： 以硝酸氧锆、钼酸铵和钨酸铵为原料, 采用水热方法合成了立方相ZrW1.7Mo0.3O8粉体. 分别采用X射线粉末衍射(XRD)、热重-差热分析(TG-DSC)、傅立叶红外光谱(FT-IR)、扫描电镜(SEM)分析测试手段研究了前驱体的晶化过程、产物的结晶度和表面形貌. 结果表明, 采用水热法在550～650℃热处理都能合成出结晶度良好的立方相ZrW1.7Mo0.3O8, 其粒径分布较为均匀, 本征热膨胀系数和宏观热膨胀系数分别为-6.61×10-6K-1和 --5.76×10-6K-1

关键词: 水热合成, 负热膨胀, ZrW1.7Mo0.3O8

Abstract: The negative thermal expansion material cubic phase ZrW1.7Mo0.3O8 powder was synthesized by using zirconium oxynitric, ammonium tungstate and ammonium molydbate as raw materials. X-ray powder diffraction (XRD), thermogravimetric analysis (TG-DSC), Fourier transform infrared spectroscopy (FT-IR), scanning electron
micrograph (SEM) were used to study the crytallization process of the precursor, crystallinity and crystal morphology of the resulted product.
The results show that pure cubic ZrW1.7Mo0.3O8 are prepared, and the particle size distribution is relatively uniform. In the temperature range from ambient temperature to 700℃, the intrinsic and macro thermal expansion coefficients of cubic ZrW1.7Mo0.3O8 are -6.61×10-6K-1 and -5.76×10-6K-1, respectively.

Key words: hydrothermal synthesis, negative thermal expansion material, ZrW1.7Mo0.3O8

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