Epitaxial Crystallization of Seeded Albite Glass

Ulagaraj Selvaraj, Chun Ling Liu, Sridhar Komarneni, Rustum Roy

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20 Scopus citations

Abstract

Glasses that are extremely difficult to crystallize are generally avoided in making glass‐ceramics. It is now possible to crystallize such glasses epitaxially using isostructural seeds. The role of solid‐state epitaxy in the crystallization of such albite (NaAlSi3O8) glass to glass‐ceramic was investigated. The glass was seeded with extremely fine ZrO2 (nonisostructural) and albite (isostructural) seed crystals. X‐ray diffraction results indicated that the albite‐seeded glass, heat‐treated at 1000°C for 100 h, epitaxially crystallized to albite, while the ZrO2 and unseeded glasses did not crystallize in identical heat‐treatment conditions. In addition, the albite‐seeded glass, heat‐treated at 905°C for 10 d, crystallized mostly to albite, whereas the ZrO2 and unseeded glasses at the same conditions contained only a small amount (<5 wt%) of nepheline (NaAlSiO4). The microstructure of the epitaxially grown glass‐ceramics showed that extremely fine crystals (∼0.2 μm thickness) were formed around the seed.

Original languageEnglish (US)
Pages (from-to)1378-1381
Number of pages4
JournalJournal of the American Ceramic Society
Volume74
Issue number6
DOIs
StatePublished - Jun 1991

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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