【作者】 侯峰； 秦永宁； 曲远方； 徐廷献；

【Author】 Hou Feng Qin Yongning Qu Yuanfang Xu Tingxian(School of Materials Science and Engineering, Tianjin University, Tianjin, China, 300072 School of Chemical Engineering, Tianjin University, Tianjin, China, 300072)

【机构】 天津大学材料学院； 天津大学化工学院；

【摘要】 本文以双施主掺杂BaTiO₃陶瓷为基体,采用颗粒化学镀技术制备Ni/PTC陶瓷复合材料,获得两相分布均匀的复合粉料,探讨了烧结气氛对金属/PTC复合材料性能的影响。研究结果表明:金属/PTC陶瓷复合材料的烧结工艺不能采用传统的PTC陶瓷工艺,而必须首先在还原气氛中烧成,以防止高温时金属的氧化,然后再进行微氧化处理,恢复BaTiO₃半导体的PTC特性。更多还原

【Abstract】 In this paper uniformly distributed Ni/PTC composite powder was obtained by means of a new electroless plating method, where BaTiO3 ceramic doped by two donors was matrix. The effect of sintering atmosphere on the proper-lies of Ni/PTC ceramic composite had been discussed. The results had shown that: ① The traditional sintering process for PTC ceramic was unfit for the Ni/PTC composite;② The Ni/PTC composite must be sintered under reduction atmosphere to avoid the metal oxidation in high temperature, then recover the PTC effect of BaTiO3 ceramic by heat treatment in the low-oxidation atmosphere.更多还原