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Effects of MoO 3 , on Phase Separation of Na 2 O‐B 2 O 3 ‐SiO 2 Glasses
Author(s) -
KAWAMOTO Y.,
CLEMENS K.,
TOMOZAWA M.
Publication year - 1981
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.1151-2916.1981.tb09605.x
Subject(s) - morphology (biology) , phase (matter) , materials science , phase boundary , analytical chemistry (journal) , glass transition , phase diagram , mineralogy , chemistry , organic chemistry , geology , polymer , paleontology , composite material
Immiscibility temperatures of Na 2 O‐B 2 O 3 ‐SiO glasses, with andwithout 1 mol% MoO 3 , additions, were determined and the effect of MoO 3 additions on the 65O°C immiscibility isotherms was established. In addition, immiscibility temperature and phase‐separation morphology of an Na 2 O‐B 2 O 3 ‐SiO 2 glass with progressive additions of MoO 3 , were investigated. It was found that the addition of small amounts of MoO 3 extends the immiscibility boundary of the system and raises the immiscibility temperature by ∼l8°C for each mol % MoO 3 , addition. Analysis of phase‐separation morphology suggests that the MoO 3 , additions do not significantly alter the tie lines of phase separation in the system, although such additions cause a lowering of the viscosities and the glass‐transition temperatures of these glasses.