Preparation, structure and electrical properties of La1-xBaxCrO3 NTC ceramics
Chen, MX (Chen, Mingxing); Zhang, HM (Zhang, Huimin); Liu, T (Liu, Ting); Jiang, H (Jiang, Hui); Chang, AM (Chang, Aimin)
2017
发表期刊JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN0957-4522
卷号28期号:24页码:18873-18878
摘要

The La1-xBaxCrO3 (x = 0-0.2) negative temperature coefficient (NTC) ceramics have been prepared by the traditional solid-state reaction method at 1600 A degrees C. Scanning electron microscope images show that the doping of Ba2+ contributes to the increase in the density. X-ray diffraction analysis has revealed that the sintered ceramics crystallize in a single perovskite structure. X-ray photoelectron spectroscopy analysis confirm the existence of Cr3+ and Cr6+ ions on lattice sites, which result in hopping conduction. The presence of the Cr3+ and Cr6+ ions is one of the significant factors that affect the electrical conductivity of La1-xBaxCrO3 ceramics. The resistance of NTC thermistors decreases with the increase of Ba content as a result of the enhancement of Cr6+ Concentration. The obtained values of rho (-50), B (-50/-25) and E (a) are in the range of 49.278-1.9839 x 10(5) Omega cm, 1767.4-3496.9 K, 0.1523-0.3013 eV, respectively.

DOI10.1007/s10854-017-7839-9
收录类别SCI
WOS记录号WOS:000415054600065
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/5488
专题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
通讯作者Zhang, HM (Zhang, Huimin)
作者单位1.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Key Lab Elect Informat Mat & Devices, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Chen, MX ,Zhang, HM ,Liu, T ,et al. Preparation, structure and electrical properties of La1-xBaxCrO3 NTC ceramics[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,2017,28(24):18873-18878.
APA Chen, MX ,Zhang, HM ,Liu, T ,Jiang, H ,&Chang, AM .(2017).Preparation, structure and electrical properties of La1-xBaxCrO3 NTC ceramics.JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,28(24),18873-18878.
MLA Chen, MX ,et al."Preparation, structure and electrical properties of La1-xBaxCrO3 NTC ceramics".JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 28.24(2017):18873-18878.
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