Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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The Change of Crystal Structure of TiO2 Fine Powders by Heat Treatment

열처리에 의한 TiO2 미립자의 결정구조 변화

  • Kim, S.J. (Dept. of Chemical Engineering, Iri National College of Agriculture and Technology) ;
  • Chang, G.H. (Dept. of Chemical Engineering, College of Engineering, Chonbuk National 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 화학공학과) ;
  • 진영철 (전북대학교 공과대학 금속공학과) ;
  • 정경락 (전북대학교 공과대학 화학공학과)
  • Published : 1994.03.31
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Abstract

Anatase $TiO_2$ particles prepared by experiment were used to study the change of crystal structure by calcination temperature. The results were as follows. Crystallite size of anatase $TiO_2$ particles increased with calcination temperature. The rate of increasing the crystallite size of anatase $TiO_2$ particles was decreased below $700^{\circ}C$ and was markedly increased above $700^{\circ}C$. Unit cell volume of $TiO_2$ was expanded at low temperature and was contracted at high temperature. This result means that the growth of crystallite size was occured in the direction.

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