Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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PTCR Effects of Semiconducting (Ba1-xPbx)TiO3 Ceramics with 0.5 mol% Pb5Ge3O11

0.5 mol% Pb5Ge3O11가 첨가된 반도성 (Ba1-xPbx)TiO3 세라믹스의 PTCR 효과

  • 윤상옥 (강릉대학교 재료공학과) ;
  • 정형진 (한국과학기술연구원 세라믹스부) ;
  • 윤기현 (연세대학교 요업공학과)
  • Published : 1991.07.01
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Abstract

The effects of 0.15mol% Y2O3 doped semiconducting (Ba1-xPbx)TiO3 ceramics with 0.5 mol% Pb5Ge3O11 as sintering additives have been investigated as function of Pb contents (from 0.05 mol to 0.3 mol) and sintering temperatures (from 1050$^{\circ}C$ to 1200$^{\circ}C$). As the Pb content increases in the (Ba1-xPbx)TiO3 system, the size and resistance of the grain increase but the capacitance of the grain boundary decreases due to the formation of liquid phase during the sintering. And with increasing the sintering temperatures, the resistance of the grain decreases but the capacitance of the grain boundary increases. The PTCR effects decrease with increasing the Pb content and the sintering temperature.

Keywords

References

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