中文摘要：

该文研究了显微结构对BaTiO3陶瓷电热特性与击穿电场的影响。采用固相反应法制备BaTiO3粉体,经干压结合冷等静压工艺成型后,在不同温度下烧结成陶瓷样品。随烧结温度提高,陶瓷晶粒长大、结构更致密,由此导致极化强度与电热效应绝热变温明显提高,但击穿电场下降。等静压工艺可进一步提升瓷体致密度并促进晶粒长大,使电热效应提升。

英文摘要：

The relationship of microstructure with electrocaloric effect and breakdown field of BaTiO3 ferroelectric ceramics was investigated in this paper.The powders were prepared by solid-state reaction method.The samples were molded by dry press and isostatic press technology,and sintered at different temperatures.With the rise of sintering temperature,the grains grew larger and the microstructure turned denser.As a result,the polarization and electrocaloric temperature change increased notably,while the breakdown field dropped.With isostatic press processing,the samples had stronger electrocaloric effect due to higher density and large grain size.