Crystallization of Anorthite‐Seeded Albite Glass by Solid‐State Epitaxy

Chunling Liu, Sridhar Komarneni, Rustum Roy

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Stoichiometric albite glass (NaAlSi3O8) was seeded with 5 wt% crystalline anorthite (CaAl2Si2O8) to make albite glass‐ceramics. The epitaxial crystallization of the albite glass to the glass‐ceramics was investigated by X‐ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS). High albite was observed as the major crystallization product over the temperature range of 800–1200°C. No crystalline albite could be crystallized from pure albite glass without seeds. Small amounts of nepheline (NaAlSiO4), however, crystallized along with albite after heat treatments at temperatures lower than 1000°C. The platelike microstructure of albite crystals was revealed in the seeded glasses. The albite blades grew epitaxially from the anorthite seeds, and the Ca content decreased in the direction away from the seeds. The degree of crystallization and the grain size were dependent upon the heat treatment conditions. By increasing the particle size of the seed, the crystallization process was retarded and the resultant microstructure was degraded. The seeding efficiency was also lowered by adding nonisostructural hexagonal anorthite seeds which produced less albite but more nepheline crystals. Crystallization of albite glass by seeding with 5 wt% anorthite is much greater than with the surface nucleation which takes place in a homogeneous 95 wt% albite + 5 wt% anorthite glass.

Original languageEnglish (US)
Pages (from-to)2665-2670
Number of pages6
JournalJournal of the American Ceramic Society
Volume75
Issue number10
DOIs
StatePublished - Jan 1 1992

Fingerprint

Crystallization
albite
Epitaxial growth
crystallization
glass
Seed
Glass
anorthite
seed
Heat treatment
Crystalline materials
Crystals
Microstructure
nepheline
seeding
Spectrometry
microstructure
Nucleation
Diffraction
Particle size

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

Cite this

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title = "Crystallization of Anorthite‐Seeded Albite Glass by Solid‐State Epitaxy",
abstract = "Stoichiometric albite glass (NaAlSi3O8) was seeded with 5 wt{\%} crystalline anorthite (CaAl2Si2O8) to make albite glass‐ceramics. The epitaxial crystallization of the albite glass to the glass‐ceramics was investigated by X‐ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS). High albite was observed as the major crystallization product over the temperature range of 800–1200°C. No crystalline albite could be crystallized from pure albite glass without seeds. Small amounts of nepheline (NaAlSiO4), however, crystallized along with albite after heat treatments at temperatures lower than 1000°C. The platelike microstructure of albite crystals was revealed in the seeded glasses. The albite blades grew epitaxially from the anorthite seeds, and the Ca content decreased in the direction away from the seeds. The degree of crystallization and the grain size were dependent upon the heat treatment conditions. By increasing the particle size of the seed, the crystallization process was retarded and the resultant microstructure was degraded. The seeding efficiency was also lowered by adding nonisostructural hexagonal anorthite seeds which produced less albite but more nepheline crystals. Crystallization of albite glass by seeding with 5 wt{\%} anorthite is much greater than with the surface nucleation which takes place in a homogeneous 95 wt{\%} albite + 5 wt{\%} anorthite glass.",
author = "Chunling Liu and Sridhar Komarneni and Rustum Roy",
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Crystallization of Anorthite‐Seeded Albite Glass by Solid‐State Epitaxy. / Liu, Chunling; Komarneni, Sridhar; Roy, Rustum.

In: Journal of the American Ceramic Society, Vol. 75, No. 10, 01.01.1992, p. 2665-2670.

Research output: Contribution to journalArticle

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