Mn1.05-xCo0.92 Ni0.03PbxO4(0.04&lex&le0.16) series NTC thermistor ceramics were studied using XRD, SEM and electrical properties measurement, especially focusing on the variation of sintering characteristics and electrical parameters with Pb-doped amount. The results showed that the sintering temperature and the resistivity were decreasing while increasing the amount of Pb-doped. The sample with the best stability and largest contractibility was obtained when x=0.12. At the same time, the optimum sintering temperature decreased to 900-950°C. The value of ρ25 and B for the sample sintered at 950°C were 490Ω·cm and 3969 K.
Xinjiang Technical Institute of Physics and Chemistry, Chinese Acad. of Sci., Urumqi 830011, China;Xinjiang Key Laboratory of Electronic Information Materials and Devices, Urumqi 830011, China;Graduate School of the Chinese Acad. of Sci., Beijing 100049, China
Wang Hai-Zhen,Kang Xue-Ya,Han Ying. The preparation and properties of Mn-Co-Ni-Pb-O NTC thermistors[J]. Gongneng Cailiao/Journal of Functional Materials,2011,42(S5):845-847.