Crystallization Kinetics and Dielectric Properties of Fresnoite BaO-TiO^sub 2^-SiO^sub 2^ Glass-Ceramics

Nucleation and crystallization kinetics of fresnoite (...) crystals in ... glasses have been explored for dielectric applications. The volume fractions crystallized at different temperatures and times were tracked by XRD analysis. The activation energy of crystallization was estimated from DTA resul...

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Published in:Journal of the American Ceramic Society 2009-11, Vol.92 (11), p.2642
Main Authors: Rangarajan, Badri, Shrout, Tom, Lanagan, Michael
Format: Article
Language:English
Subjects:
Ceramics
Crystallization
Crystals
Glass
Reaction kinetics
Temperature effects
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Shrout, Tom
Lanagan, Michael
description Nucleation and crystallization kinetics of fresnoite (...) crystals in ... glasses have been explored for dielectric applications. The volume fractions crystallized at different temperatures and times were tracked by XRD analysis. The activation energy of crystallization was estimated from DTA results to be about 528 kJ/mol, which is consistent with the value obtained by XRD results. The Avrami parameter values calculated at different temperatures from DTA results were found to be between 3.2 and 3.9, indicating that the growth is three dimensional and the mechanism of growth is interface-controlled. Additionally, because of compositional similarities, the dielectric contrast between the glass (...) and the resulting glass - ceramic (...) was minimal. (ProQuest: ... denotes formulae/symbols omitted.)
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subjects Ceramics
Crystallization
Crystals
Glass
Reaction kinetics
Temperature effects
title Crystallization Kinetics and Dielectric Properties of Fresnoite BaO-TiO^sub 2^-SiO^sub 2^ Glass-Ceramics
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