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Liquid Immiscibility in the Systems X 2 O‐MO‐B 2 O 3 ‐SiO2 (X=Na, K; M=Mg, Ca, Ba) and Na 2 O‐MgO‐BaO‐B 2 O3‐SiO 2
Author(s) -
TAYLOR PETER,
CAMPBELL ALLAN B.,
OWEN DERREK G.
Publication year - 1983
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.1151-2916.1983.tb10046.x
Subject(s) - miscibility , spinodal decomposition , component (thermodynamics) , solid solution , quaternary , materials science , chemistry , mineralogy , analytical chemistry (journal) , crystallography , phase (matter) , thermodynamics , geology , metallurgy , physics , organic chemistry , paleontology , polymer
The limits of miscibility at 650°C were determined for compositions with the mole ratio SiO 2 /B 2 O 3 =1.07 in the systems X 2 O‐MO‐B 2 O 3 ‐SiO 2 (X = Na,K; M = Mg,Ca,Ba) and Na 2 O‐MgO‐BaO‐B 2 O 3 ‐SiO 2 . The form of the miscibility gaps in the quaternary systems is similar to that previously described for the system Na 2 O‐ZnO‐B 2 O 3 ‐SiO 2 . The topography of miscibility gaps in systems of this type is discussed in detail. The extent of the miscibility gap is correlated with the polarizing power of each cation, X and M (Na > K and Zn ≅ Mg > Ca > Ba) both among the seven quaternary systems and within the single five‐component system examined. The possibility of using empirical correlations observed among the quaternary systems to predict the behavior of other compositions, or of more complex systems, is explored.