【摘要】 采用XRD、SEM和电性能测试等手段,研究了Mn1.05-xCo0.92Ni0.03PbxO4系列NTC热敏陶瓷的烧结特性和电性能参数与Pb掺入量的关系。结果表明掺Pb可以降低Mn-Co-Ni-O系NTC热敏电阻的烧结温度和室温电阻率。当Pb掺杂量x=0.12时样品的收缩率最大,样品的老化稳定性最好,该陶瓷样品的最佳烧结温度降至900~950℃之间,烧结温度为950℃时样品的ρ25和B值分别为490Ω.cm和3969K,具有较低的ρ25和较高的B值。更多还原

【Abstract】 Mn1.05-xCo0.92Ni0.03PbxO4(0.04≤x≤0.16) 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℃.The value of ρ25 and B for the sample sintered at 950℃ were 490Ω·cm and 3969K.更多还原