"Four levels of particle size distribution and four compositions of feldspar ranging from high-potash to high-soda content were evaluated in their effect on body and surface defects and selected engineering properties of an electrical porcelain. It was found that surface blistering defects occurred at a high incidence in porcelain specimens slightly overfired at 1225⁰C in a body composition containing 33% albite (soda), 67% high-potash feldspar blend and a relatively coarse, 140 mesh grind, of the feldspar. The occurrence of surface and volume blisters was correlated with the formation of a microscopic bleb structure in the porcelain matrix. It was also determined that increased milling of the feldspar compositions increased the modulus of rupture. Dielectric measurements show a decrease in loss factor from 0.024 to 0.012 for higher K₂O/Na₂O ratios. General broadening of the optimum density range was observed for high-potash feldspar bodies"--Abstract, page ii.
Moore, Robert E., 1930-2003
Wolf, Robert V., 1929-1999
Planje, Theodore J., 1919-1980
Kreidl, N. J.
Materials Science and Engineering
M.S. in Ceramic Engineering
International Minerals and Chemical Corporation
University of Missouri at Rolla
x, 66 pages
© 1967 M. W. Vance, All rights reserved.
Thesis - Open Access
Porcelain -- Microstructure
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Link to Catalog Record
Vance, Macy Wiiliam, "Relationship of feldspar properties to surface and volume defects in porcelains" (1967). Masters Theses. 5172.