Premium
The System K 2 O‐BaO‐SiO 2
Author(s) -
GUNAWARDANE R. P.,
GLASSER F. P.
Publication year - 1976
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.1151-2916.1976.tb10941.x
Subject(s) - liquidus , solidus , eutectic system , phase diagram , ternary numeral system , mineralogy , solid solution , ternary operation , analytical chemistry (journal) , ternary compound , materials science , chemistry , crystallography , phase (matter) , inorganic chemistry , metallurgy , microstructure , organic chemistry , alloy , chromatography , computer science , programming language
Phase equilibrium studies of compound formation and liquidus and solidus surfaces of the system K 2 O‐BaO‐SiO 2 are presented. The system contains 3 ternary compounds: K 4 BaSi 3 O 9 , K 8 BaSi 10 O 25 , and K 2 Ba 3 Si 8 O 20 . Both high and low polymorphs of the third have fields on the ternary liquidus surface. Solid solution with SiO 2 depresses the high‐low inversion from 1030°C at K 2 Ba 3 Si 8 O 20 to 835°C at 70.2 mol% SiO 2 . Data for 20 liquidus invariant points were found; 8 are thermal maxima and 12 are eutectics or peritectics. The isofracts of quenched glasses were determined.