铌酸盐微晶玻璃的晶化动力学及其储能性能的温度依赖性

摘要

Glass-ceramic materials of strontium barium niobate system were prepared through a melt-quenching method. The effects of crystallization temperature on the microstructure, dielectric property, breakdown strength and energy storage density of barium strontium niobate glass-ceramics were studied. The crystallization mechanism of the glass-ceramics was discussed and should be one-dimensional interfacial growth. The results indicate that the breakdown strength remarkably increases with the increase of crystallization temperature. The glass-ceramic heat treated at 900 °C was found to possess optimal properties with breakdown strength of 1300 kV/cm and energy storage density of 2.8 J/cm3, which is promising dielectric materials for high energy storage density dielectrics.%采用熔融-淬冷法制备铌酸锶钡基微晶玻璃材料，研究晶化温度对铌酸锶钡微晶玻璃的显微组织、介电性能、击穿强度和储能密度的影响。微晶玻璃的晶化机理为一维界面晶体生长。结果表明：随着晶化温度的增加，材料的击穿强度明显增加。经900°C热处理得到的微晶玻璃具有最优的性能：击穿强度为1300 kV/cm，储能密度为2.8 J/cm3，其有望用于高储能密度电介质材料。