La2O3-doped 0.6Y(2)O(3)-0.4YCr(0.5)Mn(0.5)O(3) composite NTC ceramics for wide range of temperature sensing
Zhang Bo; Zhao Qing; Chang Aimin; Huang Xia; Hou Juan; Zhao Pengjun; Ji Guang; Zhao, Q
2013
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume581Issue:12Pages:573-578
Abstract

Ceramic compositions based on 0.6Y(2)O(3)-0.4YCr(0.5)Mn(0.5)O(3) doped with La2O3 were prepared by solid state reaction at different calcining temperatures, and sintered at 1550 and 1600 degrees C. XRD patterns have shown that there exists a LaCr0.5Mn0.5O3 phase when the amount of La2O3 increases to 5.0 wt% in the calcined powders. Major phases presented in the sintered ceramics are Y2O3 phase and orthorhombic perovskite phase isomorphic to YCrO3. The obtained q25, B25/150 and B700/1000 constants of the La2O3-doped NTC thermistors are in the range of 105-106 X cm, 3600-3800 K and 6000-6600 K, respectively. The electrical conductivity in these compounds may be due to the presence of Cr3+, Cr4+, Mn3+ and Mn4+ on octahedral sites. The resistance almost does not change when the aging time is from 600 to 1000 h. Such ceramics could be used as potential candidates for NTC thermistors in a wide temperature range from ambient to 1100 degrees C.

KeywordWide Temperature Range Ntc Thermistors Perovskites La2o3
Subject AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
DOI10.1016/j.jallcom.2013.07.060
Indexed BySCI
WOS IDWOS:000324823000096
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/2627
Collection新疆维吾尔自治区电子信息材料与器件重点实验室
Corresponding AuthorZhao, Q
AffiliationChinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China; Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang Bo,Zhao Qing,Chang Aimin,et al. La2O3-doped 0.6Y(2)O(3)-0.4YCr(0.5)Mn(0.5)O(3) composite NTC ceramics for wide range of temperature sensing[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2013,581(12):573-578.
APA Zhang Bo.,Zhao Qing.,Chang Aimin.,Huang Xia.,Hou Juan.,...&Zhao, Q.(2013).La2O3-doped 0.6Y(2)O(3)-0.4YCr(0.5)Mn(0.5)O(3) composite NTC ceramics for wide range of temperature sensing.JOURNAL OF ALLOYS AND COMPOUNDS,581(12),573-578.
MLA Zhang Bo,et al."La2O3-doped 0.6Y(2)O(3)-0.4YCr(0.5)Mn(0.5)O(3) composite NTC ceramics for wide range of temperature sensing".JOURNAL OF ALLOYS AND COMPOUNDS 581.12(2013):573-578.
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