Application of Crystallization Kinetics on Differential Thermal Analysis

열시차 분석에 대한 결정화 Kinetics의 응용

  • 이선우 (한양대학교 신소재 공정 공학원) ;
  • 심광보 (한양대학교 세라믹 공정 연구센터) ;
  • 오근호 (한양대학교 세라믹 공정 연구센터)
  • Published : 1998.11.01

Abstract

Applicability of crystallization kinetics on thermal analysis was investigated for PbO-TiO2-B2O3-BaO glass systems together with theoretical background of kinetics and electron microscopic observations on nu-cleation and crystallization. Kissinger equation can be used on DTA under the assumption that the nucleus density is fixed during DTA runs. Crystallization mechanism affected on the activation energy Ek obtained from powder samples which is used for domination of surface crystallization. Avrami parameter n that was obtained from Ozawa equation represented closely the crystallization mechanisms observed by an electron microscope. The modified Kissinger equation takes into account crystallization mechanism thereby pro-ducing the true activation energy of crystallization.

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