Electrical Properties of Low-Temperature Sintered BaTiO3 Added with Lead Germanate

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J. Korean Ceram. Soc. > Volume 28(6); 1991 > Article

Journal of the Korean Ceramic Society 1991;28(6): 451.

Lead Germanate를 첨가하여 저온소결한 반도성 BaTiO3의 전기적 성질

윤상옥, 정형진¹, 윤기현²

강릉대학교 재료공학과
¹한국과학기술연구원 세라믹스부
²연세대학교 요업공학과

Electrical Properties of Low-Temperature Sintered BaTiO3 Added with Lead Germanate

ABSTRACT

Electrical properties of 0.15 mol% Y2O3 doped semiconducting BaTiO3 ceramics have been investigated as functions of Pb5Ge3O11 contents (from 0.25 mol% to 2.5 mol%) and sintering temperatures (from 1150$^{circ}C$ to 1300$^{circ}C$). The low-temperature sintered BaTiO3 ceramics above 1150$^{circ}C$ show increase of Curie temperature due to the diffusion of Pb+2 ions, and their PTCR effects decrease. As the sintering temperature increases the room temperature resistance decreases due to the growth of the grain, but the room temperature resistance increases with the increase of the Pb5Ge3O11 contents by the formation of thick insulating layers at the grain boundary.