Effect of Sintering Temperature on Low Frequency Response Properties of Ba_0.6Sr_0.4TiO₃ Ceramic

Abstract

Ba_0.6Sr_0.4TiO₃ ceramic was synthesized by the sol-gel method combined with the solidstate reaction. Phase composition and microstructure analyses indicate that pure BST phase with aggregated nanograins can be achieved. The dielectric properties change with sintering temperature, and reach the maximum at suitable temperatures. The highest dielectric constant of 4351 is obtained at 100 Hz for 1 275 ℃ sintered sample that is 2 times greater than that of the original sample, which indicates the dielectric properties can be modulated by grain size and density. The results show that Ba_0.6Sr_0.4TiO₃ is a promising candidate for microwave applications.

Keywords

BST / sol gel / dielectric property / frequency spectrum