NiMn_2O_4 negative temperature coeifficient(NTC)thermistor materials were prepared by the rheological phase method.The effect of calcination temperature and sintering temperature on the microstructure and electrical properties of NiMn_2O_4 ceramic materilas was systemically investigated and characterized by XRD,SEM,and electrical mearsurement.The results indicate that the NiMn_2O_4 powders are mainly composed of cubic spinel phase and a small amount of NiO phase at the calcination temperature of 850℃.At the...
新疆电子信息材料与器件重点实验室,中国科学院新疆理化技术研究所,乌鲁木齐830011;3.中国科学院大学,北京100049)0引言负温度系数热敏电阻(negative temperature coef-ficient,NTC)是指其阻值随温度升高而呈指数降低的电阻,由于其具有对温度敏感、体积小、响应快、价格低和互?