Dielectric properties of La/Zr codoped Ba_(0.67)Sr_(0.33)TiO_3 ceramics prepared from citrate-nitrate combustion derived powders

摘要

La/Zr codoped Ba_(0.67)Sr_(0.33)TiO_3 (BST) ceramics were fabricated via citrate-nitrate combustion derived powders, and the microstructure and dielectric properties of BST ceramics were investigated. All ceramic samples show a pure perovskite structure. The dielectric constant and loss decrease with increasing Zr content. The additions effectively suppress the grain growth of BST ceramics. It is found that the temperature-permittivity characteristics for codoped BST ceramics could be controlled using various doping content.