大功率CO_2激光器合成新型钨酸铝热敏材料的研究

Investigation on linear NTC aluminium tungstate ceramics synthesized by high power CW CO_2 laser

本文采用激光烧结新工艺合成了Al_2O_3-WO_3系负温度系数(NTC)热敏陶瓷材料。该材料在一定温区及组成下阻温关系呈线性变化,分析表明,材料中的导电相为非平衡相铝钨青铜Al_xWO_3。

This paper introduces laser powder sintering as a new technique to synthesize electronic ceramics consisting of A12O3-WO3 system. This material has some unique properties such as linear decrease in resistivity of A12O3- 50 mol % WO3 specimens with increasing temperature over the range of 10°C to 150°C. X-ray photographic powder analysis indicated that the conducting phase in the specimen is a nonequilibrium product:A1xWO3.