| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1476811 | Journal of the European Ceramic Society | 2007 | 4 Pages |
Abstract
New perovskite ceramics (Na1/4Bi3/4)(Mg1/4Ti3/4)O3 (NBMT) and (K1/4Bi3/4)(Mg1/4Ti3/4)O3 (KBMT) were synthesized using solid-state reaction method. These two new ceramics have cubic symmetry structure at room temperature. Both NBMT and KBMT show a frequency-dependent broad dielectric maximum ε′mε′m around 200–330 °C, and the dielectric constant ɛ′ varies from several hundreds at 20 °C to about two thousands of ε′mε′m. No ferroelectric behaviour is observed. Between 102 and 106 Hz, the ɛ′ exhibits frequency dispersion in rather wide temperature range. The frequency dependence of ɛ′ follows the formula, ɛ′(ν) = ɛ′(1 Hz) − B log ν, at low temperature side of the Tm.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Xiaoli Wang, Wenjuan Cao,