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题名: Spark plasma sintering of MgAl2O4-YCr0.5Mn0.5O3 composite NTC ceramics
作者: Zhang, Bo; Zhao, Qing; Chang, Aimin; Li, Yiyu; Liu, Yin; Wu, Yiquan
通讯作者: Chang, AM
关键词: Spark plasma sintering ; NTC thermistors ; Spinel ; Perovskite ; Electrical properties
刊名: Journal of the European Ceramic Society
发表日期: 2014
DOI: 10.1016/j.jeurceramsoc.2014.03.025
卷: 34, 期:12, 页:2989-2995
收录类别: SCI
摘要: New high temperature negative temperature coefficient (NTC) thermistor ceramics based on a xMgAl(2)O(4)-(1-x)YCr0.5Mn0.5O3 (x = 0.1, 0.4, 0.6) composite system have been successfully fabricated through spark plasma sintering (SPS) with a low sintering temperature and a short sintering period. The X-ray diffraction analysis indicates that the SPS-sintered composite ceramics consist of a cubic spinel MgAl2O4 phase and an orthorhombic perovskite YCr0.5Mn0.5O3 phase isomorphic to YCr0.3. The SPS-sintered composite ceramics have high relative density ranging from 94.1 to 97.4% of the theoretical density. X-ray photoelectron spectroscopy analysis corroborates the presence of Cr3+, Cr4+, Mn3+, and Mn4+ ions on lattice sites, which may result in the hopping conduction. The obtained p(25), B25-150, and B700-1000 of the SPS-sintered composite NTC thermistors are in the range of 1.53 x 10(6)-9.92 x 10(9) Omega cm, 3380-5172 K, and 7239-9543 K, respectively. These values can be tuned by adjusting the MgAl2O4 concentration.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/3736
Appears in Collections:中国科学院特殊环境功能材料与器件重点试验室_期刊论文

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作者单位: Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Xinjiang Key Lab Elect Informat Mat & Devices, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China;Univ Chinese Acad Sci, Beijing 100049, Peoples R China;Alfred Univ, New York State Coll Ceram, Kazuo Inamori Sch Engn, Alfred, NY 14802 USA

Recommended Citation:
Zhang, Bo,Zhao, Qing,Chang, Aimin,et al. Spark plasma sintering of MgAl2O4-YCr0.5Mn0.5O3 composite NTC ceramics[J]. Journal of the European Ceramic Society,2014,34(12):2989-2995.
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