Co_Ni_Sr_O系低温热敏陶瓷材料研究.pdfVIP

CoNiSrO 1, 2 1 1 1 1 杨 阳 , 妥万禄 , 常爱民, 赵 青, 张慧敏 ( 1. 中国科学院 新疆理化技术研究所, 乌鲁木齐 8300 11; 2 . 中国科学院 研究 院, 北京 100039) : 着重研究了工作温度范围为2 0~ 7 7 K 的低温热敏电阻器的 产工艺参数利用先进的半 导体陶瓷工艺, 合成了新的低温NTC 热敏陶瓷材料SrCoO3- , 并用不同量的N i 取代Co 对其掺杂 改性, 得到了不同阻值不同B 值的陶瓷材料, 同时研究了烧结温度和恒温时间对CoNiSrO 系 NTC 热敏材料参数的影响在材料粉体合成中, 采用固相烧结共沉淀法溶胶凝胶法echini 法 等不同方法制备, 讨论了不同方法的基本原理与特点, 并对一些具体制备方法进行了比较 1- x x 3- : SrCo Ni O ; NT C 热敏电阻器; 低温 : TB383 : A : 1671477 6(20 07) 07/ Research of CoNiSrO Ceramics Applied to Low Temperature NTC Thermistors 1, 2 1 1 1 1 YANG yang , T UO Wanlu , CH ANG Aimin , ZHAO qing , ZHANG Huimin ( 1. X inj iang T ech nical Institute of Phy sics and Chemistry , Chinese A cademy of S cience, Urumu i, 830011, China; 2. Grad uate Univ er sity of Chinese A cademy of S ciences , Beij ing 100039, China) Abstract: The research focuses on the technical conditions of low temperature NTC thermistor which works at 20~ 77 K . With advanced semiconducting technological process, a low tempera ture thermistor SrCoO3- was synthesized. Doping SrCoO3- with Ni to replace Co, the different electrical resistance and the different B value of samples were gained. Meanwhile the increasing sintering temperatures and the soaking time influence on the electrical resistance and the B value of samples were researched. T he different preparation methods were attempted to synthesize the powder, including simply solid state sintering, codeposition, solgel and echini, and the basic theory and features were discussed and compared. Key words: