Paper Title:
Thermal Property of BaO-TiO2-GeO2 Glass and the Crystallization Behavior
  Abstract

Correlation between surface crystallization behavior of BaO-TiO2-GeO2 (BTG) glass and the thermal stability parameter measured by Differential Thermal Analysis (DTA) was examined. We have proposed normalized thermal stability ΔTnorm 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 ΔTnorm (= (Tx-Tg)/Tm) value larger than 0.08. Compared ΔTnorm value of bulk state with that of powdered state, it has been revealed that Ba2TiGe2O8 was precipitated independently of thermal stabilities whereas BaTiGe3O9 or BaGe4O9 was precipitated in precursor glasses possessing high surface stability.

  Info
Periodical
Edited by
Shinobu Fujihara and Tadashi Takenaka
Pages
179-182
DOI
10.4028/www.scientific.net/KEM.445.179
Citation
Y. Yamazaki, H. Masai, Y. Takahashi, T. Fujiwara, "Thermal Property of BaO-TiO2-GeO2 Glass and the Crystallization Behavior", Key Engineering Materials, Vol. 445, pp. 179-182, 2010
Online since
July 2010
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$32.00
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