Electrical characterization of 0.6MgAl(2)O(4)-0.4La(1-x) Sr (x) CrO3 high temperature NTC thermistors
Luo, P (Luo, Ping);   Zhang, B (Zhang, Bo);   Zhao, Q (Zhao, Qing);   He, DL (He, Donglin);   Chang, AM (Chang, Aimin); Zhao, Q
2017
发表期刊JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷号28期号:21页码:16036-16043
摘要

This paper reports the structural and electrical properties of negative temperature coefficient (NTC) of ceramics based on 0.6MgAl(2)O(4)-0.4La(1-x) Sr (x) CrO3 (x = 0-0.1). The X-ray diffraction analysis indicates that as-sintered composite ceramics consist of a cubic spinel MgAl2O4 phase and an orthorhombic perovskite La1-x Sr (x) CrO3 phase which is isomorphic to LaCrO3. In terms of SEM and EDS analyses the brighter regions are La1-x Sr (x) CrO3, and the darker regions are MgAl2O4. There is mutual diffusion and ion migration between two phases. X-ray photoelectron spectroscopy analysis corroborates the presence of Cr3+, Cr4+ ions on lattice sites, which result in hopping conduction. The resistivity decreases with the content of Sr2+ increasing. The values of rho(200) ,B-200/500 and Ea of the as-sintered composite NTC thermistors are in the range of 203.81-4937.58 Omega cm, 2137.97-3506.01 K and 0.184-0.302 eV, respectively. The electrical properties of these ceramics can be adjusted by the Sr2+ contents.

DOI10.1007/s10854-017-7503-4
收录类别SCI
WOS记录号WOS:000413232000036
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/5025
专题中国科学院特殊环境功能材料与器件重点试验室
通讯作者Zhao, Q
作者单位Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China;Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Peoples R China
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Luo, P ,Zhao, Q. Electrical characterization of 0.6MgAl(2)O(4)-0.4La(1-x) Sr (x) CrO3 high temperature NTC thermistors[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,2017,28(21):16036-16043.
APA Luo, P ,&Zhao, Q.(2017).Electrical characterization of 0.6MgAl(2)O(4)-0.4La(1-x) Sr (x) CrO3 high temperature NTC thermistors.JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,28(21),16036-16043.
MLA Luo, P ,et al."Electrical characterization of 0.6MgAl(2)O(4)-0.4La(1-x) Sr (x) CrO3 high temperature NTC thermistors".JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 28.21(2017):16036-16043.
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