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Preparation of Sodium Disilicate Single Crystals
Author(s) -
Frischat G. H.,
Breitenbach Barbara,
Wegener W.
Publication year - 1982
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/j.1151-2916.1982.tb10479.x
Subject(s) - crystallization , nucleation , seed crystal , materials science , annealing (glass) , crystallography , crystal (programming language) , single crystal , mineralogy , chemical engineering , chemistry , composite material , organic chemistry , programming language , computer science , engineering
Single crystals of ä‐Na 2 Si 2 0 5 were prepared. Experiments without a seed crystal either failed or resulted in only fine‐grained crystals. Annealing a melt enriched with ∼1% Na 2 0 for 20 h at 815°C with a small seed crystal of α‐Na 2 Si 2 0 5 , yielded single crystals ≥30 mm long. Crystallization started spherolithically from this seed crystal which acted as a center of heterogeneous nucleation.