Vacuum hot pressed highly dense, nanograined Mg(Al1-xCrx)(2)O-4 ceramics
Yang, T (Yang, Tian); Zhang, B (Zhang, Bo); Zhao, Q (Zhao, Qing); He, DL (He, Donglin); Luo, P (Luo, Ping); Chang, AM (Chang, Aimin); Zhang, B; Chang, AM
2017
发表期刊MATERIALS LETTERS
卷号194期号:5页码:42-44
摘要Highly dense and nanograined Mg(Al1-xCrx)(2)O-4 (x = 0.1, 0.3, 0.5) negative temperature coefficient (NTC) thermistor ceramics have been successfully fabricated by vacuum hot-pressed sintering. The X-ray diffraction analysis has showed that the sintered ceramics crystallize in a cubic spinel structure. The scanning electron microscopy results show the sintered samples to be nanograined with average grain size ranging from 200 to 500 nm. The relative density of the ceramics ranges from 74.2% to 92.3%. The relative density increases and then decreases with increasing Cr content, and reaches its maximum 92.3% at x = 0.3. The values of rho(500) B-500/800 and E-a are in the range of 5.49 x 10(3)-6.06 x 10(8) Omega cm, 6847-12808 K, 0.591-1.105 eV, respectively, offer some prospects for potential use as high temperature NTC thermistors.
关键词Electroceramics Sintering Nanograin Spinel Electrical Properties
DOI10.1016/j.matlet.2017.02.010
收录类别SCI
WOS记录号WOS:000397353700012
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/4764
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Zhang, B; Chang, AM
作者单位1.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
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Yang, T ,Zhang, B ,Zhao, Q ,et al. Vacuum hot pressed highly dense, nanograined Mg(Al1-xCrx)(2)O-4 ceramics[J]. MATERIALS LETTERS,2017,194(5):42-44.
APA Yang, T .,Zhang, B .,Zhao, Q .,He, DL .,Luo, P .,...&Chang, AM.(2017).Vacuum hot pressed highly dense, nanograined Mg(Al1-xCrx)(2)O-4 ceramics.MATERIALS LETTERS,194(5),42-44.
MLA Yang, T ,et al."Vacuum hot pressed highly dense, nanograined Mg(Al1-xCrx)(2)O-4 ceramics".MATERIALS LETTERS 194.5(2017):42-44.
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