Dielectric property of NBT@BT–BZN composite ceramics

Abstract

[Formula: see text] (NBT@BT–BZN) composite ceramic materials were prepared by wet solid-phase reaction method. The effects of [Formula: see text] (NBT) on the phase structure, morphology and dielectric properties of NBT@BT–BZN composites were studied in detail. All of the NBT@BT–BZN composites consist of BT–BZN and NBT phases. The dense microstructure was observed in all the NBT@BT–BZN samples. It is found that the introduction of NBT into BT–BZN leads to enhanced temperature stability in dielectric property. Samples with 40 mol.% NBT shows good dielectric property, in which the temperature change rate of the dielectric constant at [Formula: see text] to [Formula: see text] is 1% to −15.20%, basically meeting the requirements of X9R. These results indicate that the 0.40NBT@0.60 (BT–BZN) is a promising candidate for high temperature stable materials.