Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Electrical properties of BST system thick films for microwave devices applications

초고주파 소자로의 응용을 위한 BST계 후막의 전기적 특성에 관한 연구

  • 이성갑 (서남대학교 전자전기공학부) ;
  • 박춘배 (원광대학교 전기전자 및 정보공학부) ;
  • 한병성 (전북대학교 전기공학과) ;
  • 박복기 (호원대학교 전기전자정보공학부)
  • Published : 2003.08.22
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Abstract

($Ba_{0.6-x}Sr_{0.4}Ca_x)TiO_3$ (BSCT) (x=0.10, 0.15, 0.20) powder, prepared by the sol-gel method, were mixed with organic vehicle and the BSCT thick films were fabricated by the screen-printing techniques on alumina substrates using the BSCT paste. The structural and the electrical properties were investigated for various composition ratio and sintering temperature. BSCT thick film thickness, obtained by four printings, was approximately 110 ~ 120 ${\mu}m$. The Curie temperature and dielectric constant at room temperature were decreased with increasing Ca content. The relative dielectric constant, dielectric loss and tunability of the BSCT(50/40/10) specimen, which was sintered at $1420^{\circ}C$ and measured at 1MHz, were about 910, 0.46% and 9.28% at 5kV/cm, respectively.

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