Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation of Nano-size BaTiO3 Powders Using Glycothermal Method

Glycothermal법을 이용한 나노 사이즈 BaTiO3분말의 제조

  • 김병규 (배재대학교 재료공학과) ;
  • 임대영 (배재대학교 재료공학과) ;
  • 노준석 (LG 화학기술연구원 신소재연구소) ;
  • 조승범 (LG 화학기술연구원 신소재연구소)
  • Published : 2002.07.01
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Abstract

Barium Titanate(BaTiO$_3$) nanoparticles were prepared at 22$0^{\circ}C$ through glycothermal process by using barium hydroxide and amorphous titanium hydrous gel as precursor and 1,4-butanediol and distilled water as solvent. It is demonstrated that the size of BaTiO$_3$ particles can be controlled by reaction conditions such as various content of 1,4-butanediol/distilled water volume ratio. This processing method can fabricate BaTiO$_3$ powders, which have a narrow distribution and exhibit good dispersion. The particle size of BaTiO$_3$ powders obtained by glycothermal process were about 50 nm to 200 nm on the condition that reaction temperature was 22$0^{\circ}C$ and holding time was 24 h.

본 연구에서는 TiCl$_4$를 가수분해 시켜 제조한 비정질의 titanium hydrous gel과 Ba(OH)$_2$.8$H_2O$를 출발물질로 사용하였으며, 반응용매로써 1,4-butanediol과 distilled water를 이용하여 나노 사이즈 BaTiO$_3$분말을 제조하였다. 용매로써 사용된 1,4-butanediol과 distilled water의 부피비에 따라 입자의 크기를 조절할 수 있으며, 습식화학법의 단점이었던 분말의 응집을 최소화 시킬 수 있다. 그리고 22$0^{\circ}C$의 비교적 낮은 반응온도에서 분산성이 우수하고, 입도분포가 좁은 약 50~200nm의 barium titanate 나노 분말을 제조하였다.

Keywords

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