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Phase Separation of Glasses in the System SrO‐B 2 O 3 ‐SiO 2
Author(s) -
BAYLOR RICHARD,
BROWN JESSE J.
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.tb09449.x
Subject(s) - metastability , phase (matter) , materials science , ternary operation , scanning electron microscope , analytical chemistry (journal) , microstructure , crystallography , mineralogy , chemistry , organic chemistry , chromatography , computer science , composite material , programming language
The region of stable liquid‐phase separation in the system SrO‐B 2 O 3 SiO 2 was found to extend from the SrO‐SiO 2 binary join, across the ternary region, to the SrO‐B 2 O 3 join. The boundary of the region rich in network‐forming oxides lies between the SiO 2 ‐B 2 O 3 boundary and the 2.5‐mol% SrO isopleth, whereas the maximum SrO content is between 30.3 and 35.2 mol% (42 to 48 wt%) SrO at an SiO 2 : B 2 O 3 ratio of 4:1. The microstructures of glasses quenched from the immiscibility region were characterized by scanning electron microscopy. Evidence is presented of both stable and metastable phase separation and of microseparation and coring in disperse‐phase spheres rich in network‐forming oxides.