MgAl2O4-LaCr0.5Mn0.5O3 composite ceramics for high temperature NTC thermistors
Zhang, Bo; Zhao, Qing; Chang, Aimin; Yan, Haixue; Wu, Yiquan
2013
发表期刊JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN0957-4522
卷号24期号:11页码:4452-4456
摘要

New negative temperature coefficient (NTC) ceramics based on xMgAl(2)O(4)-(1 - x)LaCr0.5Mn0.5O3 (x = 0, 0.4, 0.6, 0.8) composition were investigated. The composite ceramics (x = 0.4, 0.6, 0.8) consisted of two phases: a cubic spinel MgAl2O4 phase and an orthorhombic perovskite LaCr0.5Mn0.5O3 phase isomorphic to LaCrO3. The brighter regions were the LaCr0.5Mn0.5O3 and the darker was the MgAl2O4. There was ion diffusion between these two phases. X-ray photoelectron spectroscopy analysis corroborated the presence of Cr3+, Cr4+, Mn3+ and Mn4+ ions on lattice sites, which may result in the hopping conduction. The rho (300) and B (400/800) constant increased with increasing MgAl2O4 content. The values of rho (300), B (400/800) and activation energy of NTC thermistors were in the range 1.76-1.22 x 10(8) Omega cm, 2,646-8,711 K, 0.228-0.746 eV, respectively. This means the electrical properties can be adjusted to desired values, depending on the MgAl2O4 content.

DOI10.1007/s10854-013-1424-7
收录类别SCI
WOS记录号WOS:000326047300048
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/3857
专题新疆维吾尔自治区电子信息材料与器件重点实验室
材料物理与化学研究室
作者单位1.Chinese Acad Sci, Xinjiang Key Lab Elect Informat Mat & Devices, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China
2.Alfred Univ, Kazuo Inamori Sch Engn, Alfred, NY 14802 USA
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ London, Sch Engn & Mat Sci, London E1 4NS, England
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Zhang, Bo,Zhao, Qing,Chang, Aimin,et al. MgAl2O4-LaCr0.5Mn0.5O3 composite ceramics for high temperature NTC thermistors[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,2013,24(11):4452-4456.
APA Zhang, Bo,Zhao, Qing,Chang, Aimin,Yan, Haixue,&Wu, Yiquan.(2013).MgAl2O4-LaCr0.5Mn0.5O3 composite ceramics for high temperature NTC thermistors.JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,24(11),4452-4456.
MLA Zhang, Bo,et al."MgAl2O4-LaCr0.5Mn0.5O3 composite ceramics for high temperature NTC thermistors".JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 24.11(2013):4452-4456.
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