Masters Theses

Abstract

"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.

Advisor(s)

Moore, Robert E., 1930-2003

Committee Member(s)

Wolf, Robert V., 1929-1999
Planje, Theodore J., 1919-1980
Kreidl, N. J.

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Sponsor(s)

International Minerals and Chemical Corporation

Publisher

University of Missouri at Rolla

Publication Date

1967

Pagination

x, 66 pages

Note about bibliography

Includes bibliographical references.

Rights

© 1967 M. W. Vance, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Feldspar
Porcelain -- Microstructure

Thesis Number

T 2034

Print OCLC #

5988052

Electronic OCLC #

794005180

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