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
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
卷号646期号:10页码:249-256
摘要

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.

关键词Ntc Thermistor Co-precipitation Precursor Spinel Resistivity
DOI10.1016/j.jallcom.2015.06.073
收录类别SCI
WOS记录号WOS:000361153700037
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/4329
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;Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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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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