"The transformation of a synthetic mica composition K₂Mg₅Si₈O₂₀F₄ from amorphous to crystalline structure was studied isothermally at selected temperatures from 560°C to 1150°C. thermal changes associated with the transformation were followed by differential thermal analysis techniques. Structural changes promoted by the isothermal treatments were observed by density measurements, Debye-Scherrer X-ray diffraction techniques, electron replication microscopy, and electron scanning microscopy. Isothermal treatment at 450°C for 9 hours produces structural ordering in quenched K₂Mg₅Si₈O₂₀F₄ glass. Fluorine exerts a significant influence on the transformation temperature; decreasing amounts of fluorine producing increasing transformation temperatures. The crystallizing phase rapidly attains a limiting particle size and morphology at temperatures in the 600°C region. Treatments of quenches K₂Mg₅Si₈O₂₀F₄ glass at 900°C and above promotes a change from spherulitic to blocky crystal habit, accompanied by a more complete development of mica structure during growth"--Abstract, page ii.
Moore, Robert E., 1930-2003
Tappmeyer, Wilbur P.
Hill, Otto H.
Guyon, John C. 1931-
Day, D. E.
Materials Science and Engineering
Ph. D. in Ceramic Engineering
National Science Foundation (U.S.)
University of Missouri--Rolla
viii, 69 pages
© 1969 William H. Daniels, All rights reserved.
Dissertation - Open Access
Library of Congress Subject Headings
Glass-ceramics -- Analysis
Print OCLC #
Electronic OCLC #
Link to Catalog Recordhttp://laurel.lso.missouri.edu/record=b1067351~S5
Daniels, William H., "A crystallization study of a tetrasilicic fluormica glass" (1969). Doctoral Dissertations. 2101.