Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Synthesis of the $\textrm{BaTiO}_3$ Powders by the Glycine-Nitrate Process and Sintering Characteristics

Glycine-Nitrate 법에 의한 $\textrm{BaTiO}_3$ 분말합성 및 소결특성

  • 김구대 (한국과학기술연구원 세라믹공저센터) ;
  • 박지애 (연세대학교 세라믹공학과) ;
  • 이홍림 (연세대학교 세라믹공학과) ;
  • 송휴섭 (연세대학교 세라믹공학과)
  • Published : 1999.01.01
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Abstract

The $BaTiO_3$ powders were synthesized by GNP (Glycine-Nitrate process). The powders were prepared using carbonate and alkoxide as starting materials and nitric acid was used as a solvent for starting materials as well as an oxidant for combustion. the effects of aggregates in $BaTiO_3$ powders on green densities, sintering and dielectric characteristics were investigated. When the glycine/cation molar ratio was 1.2, reactivity of self-combustion was most intensive and the degree of aggregates after calcination was low. On sintering at $1400^{\circ}C$, maximum theoretical relative density(94.99%%0 was obtained in case of 1.2 molar ratio of glycine/cation. The dielectric constant of this sintered $BaTiO_3$ was 1919.

Keywords

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