首页|Thermal property of BaO-TiO_2-GeO_2 glass and the crystallization behavior
Thermal property of BaO-TiO_2-GeO_2 glass and the crystallization behavior
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NETL
NSTL
Trans Tech Publications Ltd
Correlation between surface crystallization behavior of BaO-TiO_2-GeO_2 (BTG) glass and the thermal stability parameter measured by Differential Thermal Analysis (DTA) was examined. We have proposed normalized thermal stability △T_(norm) of the BTG glass using crystallization temperature (Tx), glass transition temperature (Tg), and melting temperature (Tm). It was found that surface crystallization occurred in the BTG glass possessing △T_(norm) (= (Tx-Tg)/Tm) value larger than 0.08. Compared △T_(norm) value of bulk state with that of powdered state, it has been revealed that Ba_2TiGe_2O_8 was precipitated independently of thermal stabilities whereas BaTiGe_3O_9 or BaGe_4O_9 was precipitated in precursor glasses possessing high surface stability.
crystallization of Glassdifferential thermal analysisthermal stability
NETL
NSTL
Trans Tech Publications Ltd
