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- Title
Electrical and aging properties of Mn<sub>2-x</sub>Ni<sub>0.7</sub>Cu<sub>0.3</sub>Zn<sub>x</sub>O<sub>4</sub> NTC ceramic thermistors for low-resistance applications.
- Authors
Chen, Hao; Fu, Qiuyun; Chen, Tao; Luo, Wei; Tang, Bin; Zheng, Zhiping
- Abstract
The electrical properties and aging phenomenon of negative temperature coefficient (NTC) Cu-based Mn2-xNi0.7Cu0.3ZnxO4 (x = 0 – 0.4) spinel ceramics for low-resistance applications were reported. Effect of composition, sintering process, and annealing treatment on the aging phenomenon of the ceramics was investigated. X-ray photoelectron spectroscopy (XPS) analysis showed that the suppressed aging was attributed to a decreased distribution of the unstable Cu+ cations in the ceramics. With the increase of Zn-substitution concentration, a significant increase in electrical resistivity and a slight increase in thermal constant were observed. Through composition tailoring and appropriate annealing, Mn2-xNi0.7Cu0.3ZnxO4 NTC thermistors with high performance: a relatively low resistivity (~ dozens of Ω cm), a high-level thermal constant B (> 3000 K) and high stability (aging coefficient < 2.0%) were obtained. The results indicate that the spinel structure and electrical properties can be adjusted in a desired range, depending on composition and processing conditions.
- Subjects
THERMISTORS; X-ray photoelectron spectroscopy; ELECTRICAL resistivity; CERAMICS
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 29, p23054
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-09072-1