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- Title
Super-broad temperature stability achieved by la-doped BaTiO-Bi NaTiO-NbO based ceramics.
- Authors
Li, Lingxia; Chen, Junxiao; Zhang, Ning; Liu, Yaran; Yu, Jinyang
- Abstract
BaTiO-BiNaTiO-NbO-ZnO-Glass ceramics with LaO addition, were prepared and studied to satisfy super-broad temperature stability (from −55 to 325 °C, capacitance variation rate based on C is within ±15 %). With the addition of 0.4 mol% LaO, a remarkable high ceiling working temperature of 325 °C has been achieved. Meanwhile, the sample has good dielectric and electrical properties at room temperature (ε = 2,121, tanδ = 1.82 %, ρ = 1.63 × 10 Ω cm). La iron can substitute for Ti iron as La. The substitution decreases the spontaneous polarization of BaTiO, and then weakens the ferroelectricity of BaTiO. As a result, the temperature stability of the samples is improved obviously. The maximum of TCC value was reduced from 24 to only 7 % by doping 0.4 mol% LaO. This substitution also gave rise to the densification of the system.
- Subjects
DOPED semiconductors; BARIUM titanate; LANTHANUM; BISMUTH compounds; NIOBIUM oxide; THERMAL stability
- Publication
Journal of Materials Science: Materials in Electronics, 2015, Vol 26, Issue 1, p84
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-014-2367-3