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Phase Equilibria in the System Li 2 O‐BeO‐SiO 2
Author(s) -
QUINTANA PATRICIA,
WEST A. R.
Publication year - 1978
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.1151-2916.1978.tb09277.x
Subject(s) - liquidus , solidus , phase diagram , orthosilicate , metastability , ternary operation , phase (matter) , analytical chemistry (journal) , phase boundary , chemistry , mineralogy , quartz , solid solution , ternary numeral system , crystallization , materials science , crystallography , metallurgy , tetraethyl orthosilicate , organic chemistry , alloy , chromatography , computer science , programming language
The equilibrium phase diagram for the system Li 2 O‐BeO‐SiO 2 contains only one ternary compound, Li 2 BeSi0 4 . Liquidus relations for compositions containing 33 mol% SiO 2 were determined; 10 liquidus invariant points were located and 7 subsolidus compatibility triangles. The most refractory compositions lie on the join BeO‐Li 2 BeSiO 4 , with a solidus temperature of 1320°C. Metastable phases observed were a high‐quartz phase, Li 2x (Si 1 ‐ x Be x )O 2 , x 0.33; phase X which is probably a metastable orthosilicate between Li 2 BeSiO 4 and Be 2 SiO 4 ; and phase Y which lies on the join Li 2 BeSiO 4 ‐SiO 2 . The crystal chemistry and glass network‐forming properties of BeO are discussed.