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J. Korean Ceram. Soc. > Volume 35(11); 1998 > Article
Journal of the Korean Ceramic Society 1998;35(11): 1162.
열시차 분석에 대한 결정화 Kinetics의 응용
이선우, 심광보1, 오근호1
한양대학교 신소재 공정 공학원
1한양대학교 세라믹 공정 연구센터
Application of Crystallization Kinetics on Differential Thermal Analysis
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
Key words: DTA, Kissinger equation, Nucleation, Crystallization, Avrami parameter, Activation energy, PbTiO$_3$
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