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题名: Microstructure and electrical properties of Mn-Co-Zn-Cu-O NTC thermistors
作者: CHAI Xueping; JIA Sulan
关键词: Electric conductivity ; Grain boundaries ; Manganese ; Microstructure ; Pumps ; Thermistors ; Zinc oxide
刊名: Gongneng Cailiao/Journal of Functional Materials
发表日期: 2011
卷: 42, 期:5, 页:911-913,917
收录类别: CSCD
资助者: 国家自然科学基金资助项目
摘要: 采用Mn2.3Co3.7ZnxCuyO4(x=0、0.03、0.06;y=0、0.05、0.08、0.1、0.2)体系制备负温度系数热敏电阻(NTCR),并通过EDS、SEM、FTIR研究了样品的微观结构和导电机理。结果表明,Mn-Co-O体系通过掺杂ZnO、CuO可以制备低阻高B型NTCR,当x=0.03,y=0.05可得到期望的电学参数。其中,Zn存在于四面体间隙,可以提升阻值B值;Cu同时存在于四面体间隙和八面体间隙,可以降阻值B值,部分CuO在晶界发生偏析。
英文摘要: Series of Mn2.3Co3.7 ZnxCuyO4 (x=0, 0.03, 0.06; y=0, 0.05, 0.08, 0.1, 0.2) were used as negative-temperature-coefficient (NTC) thermistor. The microstructure and electrical properties of the samples were studied by EDS, SEM and FTIR. The results indicate that series of Mn-Co-O NTC ceramics with the relatively low electrical resistivity and high B constant were obtained by adding ZnO, CuO, when the x=0.03, y=0.05 led to the desired electrical parameters. The added Zn+ cations have a strong tendency to place themselves on the octahedral sites of the spinel lattice and lead to an increase in electrical resistivity and the B constant, but Cu2+ ions occupy both octahedral and tetrahedral sites and cause an decrease in those parameters. At the same time, we find that segregation of CuO occur at the grain boundary.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/1453
Appears in Collections:材料物理与化学研究室_期刊论文

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作者单位: 塔里木大学机电学院;中国科学院新疆理化技术研究所

Recommended Citation:
CHAI Xueping; JIA Sulan. Microstructure and electrical properties of Mn-Co-Zn-Cu-O NTC thermistors[J]. Gongneng Cailiao/Journal of Functional Materials,2011,42(5):911-913,917.
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文件名: Mn_Co_Zn_Cu_O系NTCR微观结构和电学特性.pdf
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