한국재료학회지 (Korean Journal of Materials Research)

  • 제16권12호
  • /
  • Pages.747-753
  • /
  • 2006
  • /
  • 1225-0562(pISSN)
  • /
  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
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티탄산 바륨 스트론튬(BaxSr1-xTiO3)에 Li2CO3 첨가한 후막의 저온소결과 가변 유전특성

Low Temperature Sintering and Tunable Dielectrics Properties of Thick Films added of Li2CO3 on BST

  • 전소현 (경남대학교 재료공학과) ;
  • 김인성 (한국전기연구원 전자기소자연구그룹) ;
  • 정순종 (한국전기연구원 전자기소자연구그룹) ;
  • 송재성 (한국전기연구원 전자기소자연구그룹) ;
  • 윤존도 (경남대학교 재료공학과)
  • Jeon, So-Hyun (Department of Materials Engineering, Kyungnam University) ;
  • Kim, In-Sung (Electric and Magnetic Devices Group, Korea Electrotechnology Research Institute) ;
  • Jung, Sun-Jong (Electric and Magnetic Devices Group, Korea Electrotechnology Research Institute) ;
  • Song, Jae-Sung (Electric and Magnetic Devices Group, Korea Electrotechnology Research Institute) ;
  • Yoon, Jon-Do (Department of Materials Engineering, Kyungnam University)
  • 발행 : 2006.12.27
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초록

(BaSr)$TiO_3$ (BST) thick films were prepared by tape casting method, using $BaTiO_3$ and $SrTiO_3$ powder slurry and their dielectric properties were investigated. With an additive, $Li_2CO_3$, the sintering temperature was lowered by $200^{\circ}C$. Sintering density was 5.7 g/$cm^3$ and the BST thick films exhibited a maximum dielectric constant, tunability at temperatures near phase transition point. Whilst their characteristics were deteriorated above the phase transition temperature, they were unchanged below the phase transition temperature, which is presumedly due to the acceleration of $90^{\circ}$ domain formation, its contribution to the relaxation of internal stress and the increase in sintering according to the replacement of Li.

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