Crystallization behavior, crystal structure and thermal expansion property of ZrW2-xMoxO8

被引：0
作者：
Liu Q. [1 ]
Cheng X. [1 ]
Yang J. [1 ]
Sun X. [1 ]
Zang C. [1 ]
机构：
[1] School of Material Science and Engineering, Jiangsu University, Zhenjiang
来源：
Jiangsu Daxue Xuebao (Ziran Kexue Ban)/Journal of Jiangsu University (Natural Science Edition) | 2011年 / 32卷 / 03期
关键词：
Crystal structure; Crystallization behavior; Phase transition; Thermal expansion property; ZrW[!sub]2-x[!/sub]Mo[!sub]x[!/sub]O[!sub]8[!/sub;
D O I：
10.3969/j.issn.1671-7775.2011.03.012
中图分类号：
学科分类号：
摘要：
ZrW2-xMoxO8 powders were synthesized by coprecipitation method using zirconium oxynitrate, ammonium tungstate and ammonium molybdate as raw materials. The effects of W/Mo ratio on the crystallization behavior, crystal structure and thermal expansion property of ZrW2-xMoxO8 were studied by differential scanning calorimetry (TG-DSC) and Powder X-ray diffraction (XRD). The results show that Mo substitution does not influence the negative thermal expansion property of the resulted ZrW2-xMoxO8 which was synthesized either via the reaction of oxides raw materials (x<0.5) at transition of its corresponding trigonal and monoclinic phase (x>0.5). The lattice constant at room temperature and the synthesis temperature decrease with the decreasing of W/Mo ratio. At high temperature, ZrW2-xMoxO8 adopting β-ZrW2O8 structure transforms to trigonal phase which does not possess NTE property.
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页码：305 / 309
页数：4
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