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Compound Formation and Phase Equilibria in the System PbO‐SiO 2
Author(s) -
SMART R. M.,
GLASSER F. P.
Publication year - 1974
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.1151-2916.1974.tb11416.x
Subject(s) - phase diagram , orthorhombic crystal system , phase (matter) , phase equilibrium , binary system , materials science , mineralogy , analytical chemistry (journal) , chemistry , crystallography , binary number , crystal structure , organic chemistry , arithmetic , mathematics
Compound formation in the system PbO‐SiO 2 was studied; the results are contrasted with those previously reported. Fifteen binary phases, 4 of which had not been reported, were prepared in the present study. The new phases include Pb 5 Si 8 O 21 , an orthorhombic polymorph of PbSiO 3 , Pb 3 SiO 5 , and a high‐SiO 2 phase containing ∼ 60 mol% SiO 2 . It was shown that Pb 3 SiO 5 is thermodynamically stable relative to Pb 2 SiO 4 and 4PbO.SiO 2 below 640±5°C. A revised phase equilibrium diagram is presented.