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)
2017
Source PublicationMATERIALS LETTERS
ISSN0167-577X
Volume194Issue:5Pages:42-44
Abstract

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.

KeywordElectroceramics Sintering Nanograin Spinel Electrical Properties
DOI10.1016/j.matlet.2017.02.010
Indexed BySCI
WOS IDWOS:000397353700012
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/4764
Collection中国科学院特殊环境功能材料与器件重点试验室
材料物理与化学研究室
Corresponding AuthorZhang, B (Zhang, Bo); Chang, AM (Chang, Aimin)
Affiliation1.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
Recommended Citation
GB/T 7714
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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