Doctoral Dissertations

Abstract

"Glasses of various compositions in the Na₂O-SiO₂ system were prepared with different levels of OH concentration. Phase separation kinetics, thermal expansion, radiation induced optical absorption, and internal friction of these glasses were studied. The increase in OH content in these glasses was found to (a) enhance the rate of phase separation; (b) increase thermal expansion above the glass temperature and change the dilatometric softening temperature in a way that depends on microstructure; (c) increase the radiation induced optical absorption bands associated with positive hole centers and decrease those associated with electron trap centers; and, (d) decrease the low temperature alkali peak and increase the high temperature peak of internal friction. Structural changes responsible for the effect of very small amounts of OH on these properties are described. It is imperative to determine and consider OH content in the evaluation of properties which are so significantly affected by it"--Abstract, page iii.

Advisor(s)

Kreidl, N. J.

Committee Member(s)

Day, D. E.
Zung, Joseph T.
Sorrell, Charles A.
Moore, Robert E.

Department(s)

Materials Science and Engineering

Degree Name

Ph. D. in Ceramic Engineering

Sponsor(s)

University of Missouri--Rolla. Materials Research Center

Publisher

University of Missouri--Rolla

Publication Date

1970

Pagination

82 pages

Note about bibliography

Includes bibliographical references (pages 34-37)

Rights

© 1970 Mokhtar Sayed Maklad, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Soluble glass -- Analysis
Hydroxyl group
Glass -- Analysis
Thermal stresses
Gases -- Separation
Absorption

Thesis Number

T 2413

Print OCLC #

6024050

Electronic OCLC #

857589545

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