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- Title
Preparation, structure and electrical properties of LaBaCrO NTC ceramics.
- Authors
Chen, Mingxing; Zhang, Huimin; Liu, Ting; Jiang, Hui; Chang, Aimin
- Abstract
The LaBaCrO (x = 0-0.2) negative temperature coefficient (NTC) ceramics have been prepared by the traditional solid-state reaction method at 1600 °C. Scanning electron microscope images show that the doping of Ba contributes to the increase in the density. X-ray diffraction analysis has revealed that the sintered ceramics crystallize in a single perovskite structure. X-ray photoelectron spectroscopy analysis confirm the existence of Cr and Cr ions on lattice sites, which result in hopping conduction. The presence of the Cr and Cr ions is one of the significant factors that affect the electrical conductivity of LaBaCrO ceramics. The resistance of NTC thermistors decreases with the increase of Ba content as a result of the enhancement of Cr Concentration. The obtained values of ρ , B and E are in the range of 49.278-1.9839 × 10 Ω cm, 1767.4-3496.9 K, 0.1523-0.3013 eV, respectively.
- Subjects
TEMPERATURE coefficient of electric resistance; CERAMICS; SCANNING electron microscopes; X-ray diffraction; DOPING agents (Chemistry)
- Publication
Journal of Materials Science: Materials in Electronics, 2017, Vol 28, Issue 24, p18873
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-017-7839-9