Determination of the activation energy for crystal growth by differential thermal analysis
作者： K. Matusita , S. Sakka , Y. Matsui
DOI: 10.1007/BF00823212
关键词: Thermodynamics 、 Linear function (calculus) 、 Crystal growth 、 Activation energy 、 Nucleation 、 Differential thermal analysis 、 Heat transfer coefficient 、 Viscous flow 、 Heat capacity 、 Materials science
摘要: A method for determining the activation energy crystal growth was calculated on basis of heat balance in differential thermal analysis (DTA) measurements and mechanism nucleation growth. The theoretical showed that term ln[C pd(δT)/dt+KδT] should be a linear function l/T, whereC p is capacity sample holder,K transfer coefficient,δT temperature difference between reference substance andt time. term,E D, obtained by multiplying slope resulting straight line byR indicative It shown thatE D three times when bulk dominant, equal to only surface predominates. result tested comparing experimentally determinedE D's with viscous flow, which known represent TheE D Li2O·2SiO2 glass dominant nucleation, approached as heating rate DTA decreased. 33.3Li2O·66.7SiO2·3TiO2 flow increased, suggesting validity analysis.
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