研究了Mn - Co -O体系通过掺入适量ZnO,采用最佳的烧结温度,可制备低阻高B型NTCR(负温度系数热敏电阻),并通过XRD、SEM研究了样品Mn1.14 Co1.83 Zn0.03 O4在不同烧结温度下的微观结构和电学特性.结果表明:Mn - Co - Zn -O体系在T=1100～1200℃很宽的温度范围可只存在尖晶石结构,同时具有高的激活能.样品Mn1.14Co1.83Zn0.03O4在烧结温度T=1100℃时存在最小电阻率,而B仍保持在4046K左右.因此,由其制成的单层片式NTCR可替代某些具有内电极的叠层器件.
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