High relative permittivity, low dielectric loss and good thermal stability of BaTiO3-bi(Mg0.5Zr0.5)O3 solid solution

(1-x)BaTiO3-xBi(Mg0.5Zr0.5)O-3 (BT-BMZ, x=00.1) ceramics were fabricated via a conventional solid-state reaction method. The phase transition, microstructure and dielectric performances of the composites were investigated. It is intriguing that the relative permittivity (epsilon(r)) increased rapidly (> 10(5)) at phase transition temperature by adding small amounts of BMZ (x=0.01). With further increasing BMZ content (0.06 <= x <= 0.1), er was deteriorated slightly, however, the temperature independence of permittivity was significantly improved (Delta epsilon/epsilon(200) degrees(C) < -15%) over a wide temperature range of 200 degrees C400 degrees C at 10 kHz. Additionally, the high relative permittivity (similar to 3000-7000) along with a low dielectric loss (<9%) were also obtained, comparisons of dielectric properties with other materials proposed for high-temperature capacitor applications indicated that these compositions are promising dielectric materials for high temperature capacitor. This work can provide a roadmap to obtain a temperature stable dielectric ceramic with high relative permittivity and low dielectric loss. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.