Abstract
Solid solutions of (1-x)BaTiO3-xBi(Mg2/3Nb1/3)O3 (0 ≤ x ≤ 0.6) were prepared via a standard mixed-oxide solid-state sintering route and investigated for potential use in high-temperature capacitor applications. Samples with 0.4 ≤ x ≤ 0.6 showed a temperature independent plateau in permittivity (ϵr). Optimum properties were obtained for x = 0.5 which exhibited a broad and stable relative ϵr ~940 ± 15% from ~25°C to 550°C with a loss tangent <0.025 from 74°C to 455°C. The resistivity of samples increased with increasing Bi(Mg2/3Nb1/3)O3 concentration. The activation energies of the bulk were observed to increase from 1.18 to 2.25 eV with an increase in x from 0 to 0.6. These ceramics exhibited excellent temperature stable dielectric properties and are promising candidates for high-temperature multilayer ceramic capacitors for automotive applications.
Original language | English (US) |
---|---|
Pages (from-to) | 2089-2095 |
Number of pages | 7 |
Journal | Journal of the American Ceramic Society |
Volume | 99 |
Issue number | 6 |
DOIs | |
State | Published - Jun 1 2016 |
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry