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Studies in Lithium Oxide Systems: VIII, Application of Silicate Liquid Immiscibility to Development of Opaque Glazes
Author(s) -
HUMMEL F. A.,
TIEN T. Y.,
KIM K. H.
Publication year - 1960
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.1151-2916.1960.tb12980.x
Subject(s) - opacity , glaze , materials science , mineralogy , oxide , silicate , scanning electron microscope , dispersion (optics) , texture (cosmology) , lithium (medication) , chemical engineering , metallurgy , composite material , chemistry , optics , ceramic , medicine , physics , image (mathematics) , artificial intelligence , endocrinology , computer science , engineering
Recent studies have shown that opaque white glasses can be obtained in the systems Li 2 O‐TiO 2 ‐SiO 2 and CaO–TiO 2 –SiO 2 , owing to the separation of immiscible liquids. The two phases in the lime system are easily observed under the petrographic microscope, but the dispersion of spheres in the matrix glass in the lithia system can be seen only with the higher resolutions available with the electron microscope. The two systems have been combined to yield a base for opaque glaze compositions which can be fired in the usual maturing range of vitrified whiteware bodies around 1250°C. The thermal expansion behavior of four‐component oxide glazes is discussed in the light of some glaze‐fit problems which might arise. A brief picture of the effect of other oxides such as Na 2 O, ZnO, BaO, and ZrO 2 on the texture and opacity of these immiscible liquid glasses is presented.