张丙寅; 姚金城; 常爱民; 赵鹏君; 赵丽君
Source Publication电子元件与材料

采用传统固相反应法制备了Mn2.1Ni0.9O4热敏陶瓷,运用X射线衍射仪、直流阻温测试仪、交流阻抗技术对其结构和电学性能进行了测试,并对Mn2.1Ni0.9O4热敏陶瓷的微观导电机理进行了分析。结果表明:Mn2.1Ni0.9O4热敏陶瓷由立方尖晶石相和岩盐相NiO组成。其电阻主要来源于晶粒和晶界的贡献,在293~363 K测试温区内,其晶粒电阻和晶界电阻都表现出明显的NTC特性,且两者导电机理均符合小极化子跳跃电导模型,晶界电阻受岩盐相NiO的影响大于晶粒电阻。

Other Abstract

The negative temperature coefficient Mn2.1Ni0.9O4 ceramics were prepared by conventional solid-state reaction method. The structure and electrical properties of the prepared ceramics were characterized by X-ray diffraction, direct current (DC) resistance temperature measurement and alternative current (AC) impedance analysis. Furthermore, the conductive mechanism of Mn2.1Ni0.9O4 ceramics were expatiated in the microscopic respect. The results show that as-prepared Mn2.1Ni0.9O4 materials are composed of phase spine and rock salt phase (NiO). The contribution to the conductivity of Mn2.1Ni0.9O4 ceramic is mainly due to the grain boundary and grain. Both grain and grain boundary components possess NTC characteristic in the measured temperature range of 293–363 K and their conductivity exhibit a good agreement with Nernst-Einstein equation, which indicate that both conductive mechanism of grain and grain boundary components could be explained by small polaron hopping. However, the NiO phase has a greater influence on the grain boundary conductivity than the grain.

Keyword负温度系数热敏陶瓷 复阻抗 导电机理 晶粒电阻 晶界电阻 尖晶石结构
Document Type期刊论文
Recommended Citation
GB/T 7714
张丙寅,姚金城,常爱民,等. Mn2.1Ni0.9O4热敏陶瓷的制备与复阻抗分析[J]. 电子元件与材料,2013,32(7):41279.
APA 张丙寅,姚金城,常爱民,赵鹏君,&赵丽君.(2013).Mn2.1Ni0.9O4热敏陶瓷的制备与复阻抗分析.电子元件与材料,32(7),41279.
MLA 张丙寅,et al."Mn2.1Ni0.9O4热敏陶瓷的制备与复阻抗分析".电子元件与材料 32.7(2013):41279.
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