Thermal property of BaO-TiO2-GeO2 glass and the crystallization behavior

Yoshiki Yamazaki; Hirokazu Masai; Yoshihiro Takahashi; Takumi Fujiwara

doi:10.4028/www.scientific.net/KEM.445.179

Thermal property of BaO-TiO₂-GeO₂ glass and the crystallization behavior

Yoshiki Yamazaki, Hirokazu Masai, Yoshihiro Takahashi, Takumi Fujiwara

ENG - Applied Physics

Tohoku University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Citations (Scopus)

Abstract

Correlation between surface crystallization behavior of BaO-TiO ₂-GeO₂ (BTG) glass and the thermal stability parameter measured by Differential Thermal Analysis (DTA) was examined. We have proposed normalized thermal stability ΔT_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 ΔT_norm (= (Tx-Tg)/Tm) value larger than 0.08. Compared ΔT_norm value of bulk state with that of powdered state, it has been revealed that Ba₂TiGe₂O₈ was precipitated independently of thermal stabilities whereas BaTiGe ₃O₉ or BaGe₄O₉ was precipitated in precursor glasses possessing high surface stability.

Original language	English
Title of host publication	Electroceramics in Japan XIII
Publisher	Trans Tech Publications Ltd
Pages	179-182
Number of pages	4
ISBN (Print)	9780878492640
DOIs	https://doi.org/10.4028/www.scientific.net/KEM.445.179
Publication status	Published - 2010

Publication series

Name	Key Engineering Materials
Volume	445
ISSN (Print)	1013-9826
ISSN (Electronic)	1662-9795

Keywords

Crystallization of glass
Differential thermal analysis
Thermal stability

Access to Document

10.4028/www.scientific.net/KEM.445.179

Cite this

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title = "Thermal property of BaO-TiO2-GeO2 glass and the crystallization behavior",

abstract = "Correlation between surface crystallization behavior of BaO-TiO 2-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 BaTiGe 3O9 or BaGe4O9 was precipitated in precursor glasses possessing high surface stability.",

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T1 - Thermal property of BaO-TiO2-GeO2 glass and the crystallization behavior

AU - Yamazaki, Yoshiki

AU - Masai, Hirokazu

AU - Takahashi, Yoshihiro

AU - Fujiwara, Takumi

PY - 2010

Y1 - 2010

N2 - Correlation between surface crystallization behavior of BaO-TiO 2-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 BaTiGe 3O9 or BaGe4O9 was precipitated in precursor glasses possessing high surface stability.

AB - Correlation between surface crystallization behavior of BaO-TiO 2-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 BaTiGe 3O9 or BaGe4O9 was precipitated in precursor glasses possessing high surface stability.

KW - Crystallization of glass

KW - Differential thermal analysis

KW - Thermal stability

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