Effects of Sr-doping on the electrical properties of MnCoNiO4 NTC ceramics
Wang Junhua; Yao Jincheng; Chen Zhaoyang; Fan Yanwei; Chang Aimin; Jia Dianzeng; Chen, ZY
2013
Source PublicationJOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN0957-4522
Volume24Issue:2Pages:622-627
AbstractThe effects of Sr-doping on Ni-Mn-Co-O spinel-structured NTC ceramics were investigated. And the precursors of Sr-doped NiCoMnO4 NTC ceramics were attained by solid state reactions at room temperature, with no intermediate compounds. Its formation and the structural evolutions were characterized by thermo-gravimetry-differential scanning calorimetry, X-ray diffraction and scanning electron microscopy with energy dispersive spectroscopy. Related electrical analyses were also performed. The values of R-298K, B-298/323 constant and the temperature coefficient of resistance alpha(298K) of the thermistors are in the range of 168-1,738 Omega, 3,257-3,359 K and -3.64 to -3.78 % K-1, respectively. Complex impedance analysis shows, for x = 0.2, single semicircular arc whose shape does not have any change with temperature. The grain boundary properties exhibit thermistor parameters with a negative temperature coefficient characteristic. The conduction for the grain boundary could be explained by oxygen vacancies. The results show that the ceramics exhibits a good electrical property because of narrow grain size distribution, controlled morphology, and high purity. This suggests that the electrical properties can be adjusted to desired values by controlling the Sr cation content. This series of materials could be considered as practical materials for NTC thermistor. Most importantly, this new approach greatly simplifies the preparation processes.
Subject AreaEngineering ; Materials Science ; Physics
DOI10.1007/s10854-012-0776-8
Indexed BySCI
WOS IDWOS:000313799700032
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/2688
Collection新疆维吾尔自治区电子信息材料与器件重点实验室
Corresponding AuthorChen, ZY
AffiliationChinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China;Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China;Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China;Xinjiang Univ, Inst Appl Chem, Urumqi 830046, Peoples R China
Recommended Citation
GB/T 7714
Wang Junhua,Yao Jincheng,Chen Zhaoyang,et al. Effects of Sr-doping on the electrical properties of MnCoNiO4 NTC ceramics[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,2013,24(2):622-627.
APA Wang Junhua.,Yao Jincheng.,Chen Zhaoyang.,Fan Yanwei.,Chang Aimin.,...&Chen, ZY.(2013).Effects of Sr-doping on the electrical properties of MnCoNiO4 NTC ceramics.JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,24(2),622-627.
MLA Wang Junhua,et al."Effects of Sr-doping on the electrical properties of MnCoNiO4 NTC ceramics".JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 24.2(2013):622-627.
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