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学科主题: Engineering (provided by Thomson Reuters)
题名: Mn2.1Ni0.9O4热敏陶瓷的制备与复阻抗分析
其他题名: preparation and complex impedance analysis of mn_(2.1)ni_(0.9)o_4 negative temperature coefficient ceramics
作者: 张丙寅; 姚金城; 常爱民; 赵鹏君; 赵丽君
关键词: 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
刊名: 电子元件与材料
发表日期: 2013
卷: 32, 期:7
收录类别: CSCD
资助者: 国家863计划项目资助; 新疆维吾尔自治区高技术研究发展计划项目资助
摘要: 采用传统固相反应法制备了Mn_(2.1)Ni_(0.9)O_4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Mn_(2.1)Ni_(0.9)O_4热敏陶瓷的微观导电机理进行了分析。结果表明:Mn_(2.1)Ni_(0.9)O_4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。
英文摘要: The negative temperature coefficient Mn_(2.1)Ni_(0.9)O_4 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 Mn_(2.1)Ni_(0.9)O_4 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.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/2580
Appears in Collections:新疆维吾尔自治区电子信息材料与器件重点实验室_期刊论文

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作者单位: 新疆电子信息材料与器件重点实验室;中国科学院特殊环境功能材料与器件重点实验室;中国科学院新疆理化技术研究所;中国科学院大学

Recommended Citation:
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).
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