Electrical properties and aging mechanism of Y2O3-MCr0.5Mn0.5O3 (M = Sm, Gd) composite NTC ceramics
Zhao, Q (Zhao, Qing)1; Zhang, B (Zhang, Bo)1; Chang, AM (Chang, Aimin)1; Wu, YQ (Wu, Yiquan)1
2015
Source PublicationJOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN0957-4522
Volume26Issue:6Pages:4221-4225
Abstract

We report the structure and negative temperature coefficient (NTC) electrical properties of Y2O3-MCr0.5Mn0.5O3 (M = Sm, Gd) composite thermistor ceramics. The high-temperature aging mechanism has been revealed by using defect chemistry theory in combination with X-ray photoelectron spectroscopy analysis. The composite ceramics consist of Y2O3 and perovskite phase. All the NTC thermistors show a linear relationship between the natural logarithm of the resistivity and the reciprocal of the absolute temperature, indicative of the small-polaron hopping conductivity. The resistivity increases with the increase of Y2O3 content for Y2O3-SmCr0.5Mn0.5O3 and Y2O3-GdCr0.5Mn0.5O3 composite ceramics, respectively. The resistivity at 300 A degrees C is in the range 10(2)-10(4) Omega A cm together with a B (300/800) from 4163 to 5614 K. The resistance decreases after high-temperature aging, suggesting that both aging atmosphere and the concentration of oxygen vacancies play a significant role in the change of electrical conductivity.

DOI10.1007/s10854-015-2971-x
Indexed BySCI
WOS IDWOS:000354404800112
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/4905
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
Corresponding AuthorChang, AM (Chang, Aimin)
Affiliation1.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
3.Alfred Univ, Kazuo Inamori Sch Engn, New York State Coll Ceram, Alfred, NY 14802 USA
Recommended Citation
GB/T 7714
Zhao, Q ,Zhang, B ,Chang, AM ,et al. Electrical properties and aging mechanism of Y2O3-MCr0.5Mn0.5O3 (M = Sm, Gd) composite NTC ceramics[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,2015,26(6):4221-4225.
APA Zhao, Q ,Zhang, B ,Chang, AM ,&Wu, YQ .(2015).Electrical properties and aging mechanism of Y2O3-MCr0.5Mn0.5O3 (M = Sm, Gd) composite NTC ceramics.JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,26(6),4221-4225.
MLA Zhao, Q ,et al."Electrical properties and aging mechanism of Y2O3-MCr0.5Mn0.5O3 (M = Sm, Gd) composite NTC ceramics".JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 26.6(2015):4221-4225.
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