New negative temperature coefficient ceramics in La-doped CaCu3Ti4O12 system
Jia, XM (Jia, Xuemei)[ 1,2,3 ]; Zhang, B (Zhang, Bo)[ 1,2 ]; Chang, AM (Chang, Aimin)[ 1,2 ]
2019
Source PublicationJOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN0957-4522
Volume30Issue:11Pages:10217-10223
Abstract

The Ca1-xLaxCu3Ti4O12 (0x0.3) ceramics have been successfully prepared by the traditional solid-state reaction method at 1090 degrees C for 10h. Effects of La3+ doping on the structure and negative temperature coefficient electrical properties of Ca1-xLaxCu3Ti4O12 ceramics are investigated in detail. Scanning electron microscope images demonstrate that the grain size of ceramic samples decreases with the increasing La3+ content. X-ray photoelectron spectroscopy analysis further confirms the coexistence of Cu+/Cu2+ and Ti3+/Ti4+ ions, which is one of the considerable contributors to the electrical conductivity of Ca1-xLaxCu3Ti4O12 ceramics. All the prepared ceramics show a linear relationship between the natural logarithm of the resistivity and the reciprocal of absolute temperature, indicating NTC characteristics. The obtained values of (25), B-200/400 and Ea for the thermistors are in the range of 2.00x10(5)-5.22x10(7)cm(-1), 2644-4205K, 0.228-0.363eV, respectively.

DOI10.1007/s10854-019-01358-1
Indexed BySCI
WOS IDWOS:000469399700018
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Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5757
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
Affiliation1.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
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Jia, XM ,Zhang, B ,Chang, AM . New negative temperature coefficient ceramics in La-doped CaCu3Ti4O12 system[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,2019,30(11):10217-10223.
APA Jia, XM ,Zhang, B ,&Chang, AM .(2019).New negative temperature coefficient ceramics in La-doped CaCu3Ti4O12 system.JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,30(11),10217-10223.
MLA Jia, XM ,et al."New negative temperature coefficient ceramics in La-doped CaCu3Ti4O12 system".JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 30.11(2019):10217-10223.
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