Synthesis and properties of Mn1.05-yCo1.95-x-z-wNixMgyAlzFewO4 NTC ceramic by co-precipitation method
Xia, JB (Xia, Junbo); Zhao, Q (Zhao, Qing); Chang, AM (Chang, Aimin); Zhang, B (Zhang, Bo)
2015
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume646Issue:10Pages:249-256
Abstract

Mn1.05-yCo1.95-x-z-wNixMgyAlzFewO4 negative temperature coefficient (NTC) material was synthesized by double precipitation reacting method. The synthesis condition was optimized. Fourier infrared (FI) spectrometer indicated that the precursor was consisted of oxalate and hydroxide. The powder was studied by Xeray diffraction (XRD) to obtain the optimum calcination temperature of 800 degrees C. The ceramics were mainly in the cubic spinel structure except for the minority of cubic cobalt oxide. Scanning electron microscope (SEM) image showed that the grain size decreased with the increase of Al2O3 content in the ceramic. While the room temperature resistivity rho(25) increased from 3027 Omega cm to 16,911 Omega cm with increasing Al2O3 content. The material constants B-25/85 and activity energies were in the range of 3592-3977 K and 0.3112-0.3330 eV, respectively. Complex impedance analysis indicated that the grain boundary resistivity increased with increasing Al2O3 content, whereas, the grain resistance remains virtually unchanged.

KeywordNtc Thermistor Co-precipitation Precursor Spinel Resistivity
DOI10.1016/j.jallcom.2015.06.073
Indexed BySCI
WOS IDWOS:000361153700037
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/4329
Collection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
AffiliationChinese 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
Recommended Citation
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Xia, JB ,Zhao, Q ,Chang, AM ,et al. Synthesis and properties of Mn1.05-yCo1.95-x-z-wNixMgyAlzFewO4 NTC ceramic by co-precipitation method[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2015,646(10):249-256.
APA Xia, JB ,Zhao, Q ,Chang, AM ,&Zhang, B .(2015).Synthesis and properties of Mn1.05-yCo1.95-x-z-wNixMgyAlzFewO4 NTC ceramic by co-precipitation method.JOURNAL OF ALLOYS AND COMPOUNDS,646(10),249-256.
MLA Xia, JB ,et al."Synthesis and properties of Mn1.05-yCo1.95-x-z-wNixMgyAlzFewO4 NTC ceramic by co-precipitation method".JOURNAL OF ALLOYS AND COMPOUNDS 646.10(2015):249-256.
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