Crystallization of 60SiO2-20MgO-10Al2O 3-10BaO glass ceramics

E. Manor; R. Z. Shneck

doi:10.1111/j.1551-2916.2005.00337.x

Crystallization of 60SiO₂-20MgO-10Al₂O ₃-10BaO glass ceramics

E. Manor, R. Z. Shneck

Department of Materials Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Three distinctly different microstructures of silica (as quartz and crystobalite), alumina, enstatite, and celsian, were found to develop in a 60SiO₂-20MgO-10Al₂O₃-10BaO glass ceramic. At 1010 C, growth of wormy fibrillar crystals was observed, indicating that crystal growth was diffusion controlled. At the intermediate temperature of 1080°C, a coarse cellular microstructure developed with multiple spherical particles nucleated on their surfaces and in the surrounding glass. At 1200°C, the glass crystallizes in a denderitic morphology but the dendrites were actually fragmented into multiple cube-shaped enstatite crystals, indicating a transition to interface-controlled growth. The crystals coarsen with time but maintain their order along the dendrite skeletons.

Original language	English
Pages (from-to)	2249-2254
Number of pages	6
Journal	Journal of the American Ceramic Society
Volume	88
Issue number	8
DOIs	https://doi.org/10.1111/j.1551-2916.2005.00337.x
State	Published - 1 Aug 2005

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1111/j.1551-2916.2005.00337.x

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AB - Three distinctly different microstructures of silica (as quartz and crystobalite), alumina, enstatite, and celsian, were found to develop in a 60SiO2-20MgO-10Al2O3-10BaO glass ceramic. At 1010 C, growth of wormy fibrillar crystals was observed, indicating that crystal growth was diffusion controlled. At the intermediate temperature of 1080°C, a coarse cellular microstructure developed with multiple spherical particles nucleated on their surfaces and in the surrounding glass. At 1200°C, the glass crystallizes in a denderitic morphology but the dendrites were actually fragmented into multiple cube-shaped enstatite crystals, indicating a transition to interface-controlled growth. The crystals coarsen with time but maintain their order along the dendrite skeletons.

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Crystallization of 60SiO₂-20MgO-10Al₂O ₃-10BaO glass ceramics

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