Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Effects of Glass Frit Addition on Microstructures and Dielectric Properties of Sintered BaTiO3 Ceramics

Glass Frit의 첨가에 따른 BaTiO3 소결체의 유전 특성 및 미세구조 변화

  • 우덕현 (충주대학교 신소재공학과, 친환경에너지 부품.소재센터) ;
  • 윤만순 (충주대학교 신소재공학과, 친환경에너지 부품.소재센터) ;
  • 손용호 ((주)CQV) ;
  • 류성림 (충주대학교 신소재공학과, 친환경에너지 부품.소재센터) ;
  • 어순철 (충주대학교 신소재공학과, 친환경에너지 부품.소재센터) ;
  • 권순용 (충주대학교 신소재공학과, 친환경에너지 부품.소재센터)
  • Published : 2010.03.01
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Abstract

$BaTiO_3$ dielectric ceramics are widely used to multi-layer ceramic capacitor. The $BaTiO_3$ powder was synthesized at $950^{\circ}C$ by using a solid state reaction and grinded by using a high-energy mill. And then, 2.53 wt% glass frit was added to the synthesized $BaTiO_3$ powders for lowering the sintering temperature. The mixed powders were sintered at various temperatures of $1170^{\circ}C$, $1200^{\circ}C$, $1230^{\circ}C$. Microstructures of the sintered $BaTiO_3$ ceramics were inspected by SEM and crystal structures were analyzed by XRD method. The relative dielectric constant was measured by using a impedance/gain phase analyzer. The synthesized $BaTiO_3$ powder had the tetragonal perovskite structure without secondary phase and the particle size was below 200 nm. The relative densities measured at the samples sintered at the temperature above $1200^{\circ}C$ were about 95%. The relative dielectric constant showed maximum value of 2310, which was measured in the specimen sintered at $1200^{\circ}C$. From these results, we could know that the added glass frit had effects on both lowering the sintering temperature and improving the dielectric property.

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References

  1. H. Kishi, Y. Mizuno, and H. Chazono, "Basemetal electrode-multilayer ceramic capacitors: Past, present and future presectives", Jpn. J. Appl. Phys., Vol. 42, No. 1, p. 1, 2003. https://doi.org/10.1143/JJAP.42.1
  2. 이석원, 윤중락, “X7R 적층칩 세라믹 캐패시 터조성의 희토류첨가에 따른 유전특성”, 전기 전자재료학회논문지, 16권, 12호, p. 1080, 2003.
  3. 신효순, “졸 코팅 법을 이용한 $BaTiO_3$ 분체의 첨가제 코팅 2-Mg, Ca, Mn 이 첨가된 $BaTiO_3$ 졸을 이용한 첨가제 코팅 공정”, 전기전자재료학회논문지, 17권, 9호, p. 960, 2004. https://doi.org/10.4313/JKEM.2004.17.9.960
  4. 이상철, 최의선, 배선기, 이영희, “고용량 캐패 시터로의 응용을 위한 (Ba, Bi, Sr) $TiO_3$ 세라믹스의 제조 및 특성에 관한 연구", 전기전자재료학회논문지, 16권, 3호, p. 195. 2003. https://doi.org/10.4313/JKEM.2003.16.3.195
  5. J. J. Kim, H. S. Jung, J. Y. Cho, J. O. Hong, Y. T. Kim, and K. H. Hur, "Synthesis of 100 nm $BaTiO_3$ by Solid-state Reaction", J. Kor. Cer. Soc., Vol. 46, No. 2, p. 170, 2009. https://doi.org/10.4191/KCERS.2009.46.2.170
  6. M. T. Buscaglia, M. Bassoli, V. Buscaglia, and R. Alessio, "Solid-state of ultrafine $BaTiO_3$ powders from nanocrystalline $BaCO_3$ and $TiO_2$", J. Am. Ceram. Soc., Vol. 88, No. 9, p. 2374, 2005. https://doi.org/10.1111/j.1551-2916.2005.00451.x
  7. K. Ying and T. E. Hsieh, "Sintering behavior and dielectric properties of nanocrystalline barium titanate", Mater. Sci. & Eng. B, Vol. 70, p. 241, 2007.
  8. H. Kishi, Y. Mizuno, and H. Chazono, "Base-metal eletrode-multilayer ceramic capacitors: Past, present and future perspectives", Jpn. J. Appl. Phys., Vol. 42, No. 1, p. 1, 2003. https://doi.org/10.1143/JJAP.42.1
  9. J. M. Haussonne, G. Desgardin, P. H. Bajolet, and B. Raveau, "Barium titanate perovskite sintered with lithium fluoride", J. Am. Ceram, Soc., Vol. 66, No. 11, p. 801, 1983. https://doi.org/10.1111/j.1151-2916.1983.tb10566.x
  10. K. Ramesh Chowdary and E. C. Subbarao, "Liquid phase sintered $BaTiO_3$", Ferroelectrics, Vol. 37, No. 1, p. 689, 1981. https://doi.org/10.1080/00150198108223523
  11. N. Wada, T. Hiramatsu, T. Tamura, and Y. Sakabe, "Investigation of grain boundaries influence on dielectric properties in finegrained $BaTiO_3$ ceramics without the core-shell structure", Ceram. Inter., Vol. 34, p. 933, 2008. https://doi.org/10.1016/j.ceramint.2007.09.061