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THE FLUXING EFFECT OF FELDSPAR IN WHITEWARE BODIES *
Author(s) -
Schramm E.,
Hall F. P.
Publication year - 1936
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.1151-2916.1936.tb19815.x
Subject(s) - microcline , albite , feldspar , quartz , orthoclase , mineralogy , vitrification , viscosity , materials science , solubility , muscovite , metallurgy , geology , chemistry , composite material , medicine , organic chemistry , andrology
A bstract A review is given of literature dealing with the melting relations of the feldspars, the solubility of quartz and clay in feldspar, the use of feldspar in bodies, and the direct determination of viscosity. An experimental study is reported, based on the determination of vitrification curves and viscosity at high temperature for several types of bodies, employing different typical feldspars alone and in mixtures. Various potash feldspars give similar results when allowance is made for free quartz content. The action of several natural feldspars of intermediate soda content was duplicated with chemically identical blends of pure microcline and pure albite. The validity of chemical control is confirmed. The action of feldspar is best considered, not as a simple melting and solution process, but as providing a source of fluxing elements needed to bring about glass‐forming reactions.