Crystallization Kinetics of Lithium Diborate Glass by DTA |
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Authors: | N Koga K Yamaguchi J Šesták |
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Institution: | (1) Chemistry Laboratory, Faculty of School Education, Hiroshima University, 1-1-1 Kagamiyama, Higashi-Hiroshima 739-8524, Japan;(2) Division of Solid-State Physics, Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, CZ-162 53, Czech Republic |
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Abstract: | The crystallization process of Li2B4O7 in the glass of stoichiometric composition, characterized by the crystal growth of pre-existing nuclei, was analyzed kinetically
by means of DTA. Because the number of pre-existing nuclei for the subsequent growth varies depending on the cooling rate
of the glass-forming melt and heating rate of the as-prepared glass, a modified Kissinger plot was applied for evaluating
the apparent activation energy to the crystal growth in the glass samples with three different thermal histories, i.e., the
pre-annealed, slowly quenched and quickly quenched glasses. The process was characterized by the three dimensional growth
of pre-existing nuclei with the apparent activation energy of ca 340 kJ mol−1.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | crystallization DTA kinetics Kissinger plot lithium diborate glass |
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