TiO2 ultrafine powder microdoped with Nb5+, Ba2+ is prepared by spray drying. The relations between the dielectric properties of TiO2 and the sintering temperature, measuring conditions are studied. The mechanism of TiO2 ceramic BLC is illustrated.

• 用液相喷雾干燥法制备含Nb~(5+),Ba~(2+)微量杂质的TiO_2超细原料粉末,研究了TiO_2陶瓷的电性能与烧结温度和测试条件的关系,阐述了TiO_2晶界层电容器的形成机制。