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Rare Earth and Perovskite Composite Ceramics Applied for the Thermistor in Wide Temperature Range
Zhang Bo; Zhao Qing; Chang Aimin; Zhao Pengjun; Guan Fang
2012
Conference Name7th China International Conference on High-Performance Ceramics, CICC-7
Source PublicationKey Engineering Materials
Pages613-616
Conference DateNovember 4, 2011 - November 7, 2011
Conference PlaceXiamen, PEOPLES R CHINA
Publication PlaceSwitzerland
Abstract

Different compositions (AY2O3+BCeO 2)-0.4YCr0.5Mn0.5O3 (A+B=0.6) were prepared via a conventional solid-state reaction at 1200°C, and sintered under air atmosphere at 1600°C. XRD patterns analysis has revealed that for 02O3, CeO2 and orthorhombic perovskite YCr 0.5Mn0.5O3 phase, respectively. SEM and EDAX observations confirm the obtaining of three-phased composite ceramics. The brighter regions are the Y2O3 and CeO2 phase, whereas the darker are perovskite phase. All the NTC thermistors prepared show a similar linear relationship between the ln of the resistance and the reciprocal of the absolute temperature, indicative of NTC characteristics. For 0&leA&le0.6, the plotting curves of resistance-temperature characteristic are none linear on the wide temperature range, exhibit two branches. The obtained B25/150 and B700/1000 constants of the thermistors are in the range 3600-4400K and 6700-12000K. The magnitude order of the resistivity at 25°C is of 106-107Ωcm and activation energies vary from 0.313 to 1.029 eV at low and high temperatures, respectively. These compounds, having good NTC characteristics in a wide range of temperatures, could be applied as potential candidates for NTC thermistors from ambient to 1100°C. © (2012) Trans Tech Publications.

KeywordWide Temperature Range Ntc Thermistors Perovskites Y2o3
Indexed ByEI
Document Type会议论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/2299
Collection材料物理与化学研究室
AffiliationChinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
Zhang Bo,Zhao Qing,Chang Aimin,et al. Rare Earth and Perovskite Composite Ceramics Applied for the Thermistor in Wide Temperature Range[C]. Switzerland,2012:613-616.
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