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Three Planes in the Quaternary System CaO‐ZnO‐Al 2 O 3 ‐SiO 2
Author(s) -
SEGNIT E. R.
Publication year - 1962
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.1151-2916.1962.tb11069.x
Subject(s) - anorthite , liquidus , tridymite , melilite , mineralogy , quaternary , materials science , phase diagram , ceramic , melting point , gehlenite , cristobalite , phase (matter) , geology , spinel , metallurgy , chemistry , quartz , composite material , paleontology , organic chemistry , alloy
Equilibrium relations in part of the quaternary system CaO‐ZnO‐Al 2 O 3 ‐SiO 2 have been investigated by the quenching method. Liquidus surfaces and primary‐phase fields have been determined in planes containing respectively 8, 10, and 15% A1 2 O 3 , as well as six quaternary invariant points. The minimum melting point in the system is 1030°± 5°C at a composition of 18.5% CaO, 22.5% ZnO, 8.2% A1 2 O 3 , and 50.8% SiO 2 ,. At this point the condensed phases in equilibrium are tridymite, willemite, melilite, anorthite, and liquid. The results have a bearing on reactions occurring in lead blast‐furnace slags, in some ceramic glazes, and in certain zinc‐bearing rocks and ores.