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Abstract

This essay mainly studies the electrical properties of Ca–Ce–Ti–W–O oxides negative temperature coefficient (NTC) thermistors. The as-sintered dense ceramics are two-phased, compounding of a scheelite CaWO4 phase and a rutile TiO2 phase. The existence of Ce3+, which causes the materials to exhibit semiconducting behavior, has been confirmed by XPS analysis. Electrical property studies reveal that ρ25∘C and B300/600 °C are 3.9 × 106 ~ 2.9 × 107 Ω·cm, 4155 ~ 4426 K, respectively. The aging coefficient is 1.8–5.3% in the period of 200 h at 500 °C. With the Al2O3 doping the aging coefficient can be further suppressed to the lowest value of 1.48% without deteriorating other parameters. Such kind of ceramic materials can be used to manufacture high temperature NTC thermistors.

Details

Title
Structure and electrical properties of Al2O3 doped Ca–Ce–Ti–W–O NTC ceramics at high temperature
Author
Hu, Mingzhe 1   VIAFID ORCID Logo  ; Ji, Wanxue 2 ; Wang, Liwei 3 ; Lv, Shanjing 1 ; Zhao, Qi 1 ; Hao, Yongde 2 

1  Guizhou Minzu University, School of Physics and Mechatronics Engineering, Guiyang, China (GRID:grid.443389.1) (ISNI:0000 0000 9477 4541) 
2  Huazhong University of Science & Technology, School of Optical and Electronic Information, Wuhan, China (GRID:grid.33199.31) (ISNI:0000 0004 0368 7223) 
3  Liupanshui Normal University, Department of Physics and Electronics, Liupanshui, China (GRID:grid.459704.b) (ISNI:0000 0004 6473 2841) 
Pages
26157-26166
Publication year
2022
Publication date
Dec 2022
Publisher
Springer Nature B.V.
ISSN
09574522
e-ISSN
1573482X
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1007/s10854-022-09302-6
ProQuest document ID
2740745768
Copyright
© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.