Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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The Phase Transition of TiO2 fine Powders by Heat Treatment

열처리에 의한 TiO2 미립자의 상전이

  • Kim, S.J. (Dept. of Chemical Engineering, Iri National College of Agriculture and Technology) ;
  • Chang, G.H. (Dept. of Metallurgical Engineering, College of Engineering, Chonbuk National University) ;
  • Byuon, Y.S. (Dept. of Industrial Chemistry, Chonbuk Sanup University) ;
  • Jin, Y.C. (Dept. of Metallurgical Engineering, College of Engineering, Chonbuk National University) ;
  • Jheong, G.R. (Dept. of Chemical Engineering, College of Engineering, Chonbuk National University)
  • 김성종 (이리농공전문대학 화학공업과) ;
  • 장경환 (전북대학교 공과대학 금속공학과) ;
  • 변윤섭 (전북산업대학교 공업화학과) ;
  • 진영철 (전북대학교 공과대학 금속공학과) ;
  • 정경락 (전북대학교 공과대학 화학공학과)
  • Published : 1993.12.31
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Abstract

The preparation of $TiO_2$ fine particles from $TiCl_4$ and oxygen by the vapor-phasereaction was investigated at $850^{\circ}C$ with an emphasis on the effect of its experimental conditions on the crystal type of the products. Anatase $TiO_2$ particles prepared by experiment were used to study anatase-rutile transition by calcination temperature, the additives and gas atmosphere. The results were as follows. The kinetics of anatase-rutile transition was well agreed with A vrami equation, and the activation energy of transition was 35kcal/mol. The addition of CuO in anatase $TiO_2$ particles accelerated the anatase-rutile transition, and its transition was retarded in vaccum.

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