The effect of stoichimetry of VO2 nano-grain ceramics on their thermal and electrical properties

被引：5
作者：
Luo, Mengna [1 ]
Wei, Liuya [1 ]
Fu, Qun [1 ]
Lei, Deming [1 ]
Zheng, Chenmou [1 ]
机构：
[1] Sun Yat Sen Univ, Dept Phys, Sch Chem & Chem Engn, Guangzhou 510275, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2007年 / 104卷 / 2-3期
关键词：
ceramics; nanostructures; electrical properties;
D O I：
10.1016/j.matchemphys.2007.02.085
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The VO2.000 +/- x nano-grain ceramics were prepared by sintering VO2.000 +/- x nano-powders in Ar atmosphere. The influence of stoichimetric ratio of VO2.000 +/- x (0 <= x < 0.050) ceramics on the phase transition heat (Delta H) and resistivity jump of VO2.000 +/- x ceramics in the vicinity of transition temperature (T-c) was investigated. The vertical bar Delta H vertical bar and resistivity jump had similar relation with stoichimetric ratio of VO2.000 +/- x, the vertical bar Delta H vertical bar and resistivity jump of stoichimetric VO2.000 +/- x were the highest in VO2.000 nano-grain ceramics. VO2.000 +/- x nano-grain ceramics held the good electrical properties of VO, materials, and its resistivity jump was about 700 times. (c) 2007 Published by Elsevier B.V.
引用
收藏
页码：258 / 260
页数：3
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