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Dependence of Crystallization Behavior on Particle Size in Barium Strontium Titanate Glass‐Ceramics
Author(s) -
Zhu Jia,
Zhang Yong,
Song Xiaozhen,
Zhang Qian,
Yang Dongliang,
Chen Yongzhou
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13680
Subject(s) - crystallization , materials science , mineralogy , particle size , phase (matter) , differential thermal analysis , perovskite (structure) , chemical engineering , particle (ecology) , feldspar , analytical chemistry (journal) , composite material , chemistry , quartz , optics , chromatography , diffraction , geology , organic chemistry , oceanography , engineering , physics
Differential thermal analysis studies on the crystallization kinetics and phase developments of barium strontium titanate glass‐ceramics have been performed for a series of glass particles with different particle sizes. The crystallization behavior was deduced to be influenced strongly by the particle size of the glass samples. These studies have revealed the initial formation at lower temperatures of metastable fresnoite Ba 2 TiSi 2 O 8 ( BTS ) phase followed by its transformation at higher temperatures to feldspar BaAl 2 Si 2 O 8 ( BAS ) and perovskite (Ba,Sr)TiO 3 ( BST ) phases. The metastable BTS phase was proved to crystallize predominately by surface crystallization while the feldspar BAS phase showed significant evidence of internal crystallization. And for the perovskite BST phase, crystallization mechanism changes from surface to internal type at a critical particle size of 75 μm. In addition, activation energy and the Avrami parameter for crystallization have been determined for the three phases by the employment of glass samples with two typical particle sizes.