Masters Theses

Abstract

"The introduction of Ag into Si-As-Te glasses permits the incorporation of Se, otherwise volatile and/or degradable as a constituent in Si-containing chalcogenide glasses. Si-As-Ag-Te-Se glasses exhibit much higher softening ranges and glass transition temperatures than encountered in known chalcogenide systems. A glass Si35As15Ag10Te20Se20 had the viscosity log η =13 at about 500°C, as compared to 370°C for the base glass Si35As25Te40, the viscosity of log η = 9.8 at about 560°C, as compared to 442°C for the base glass Si35As25Te40. Phase separation occurs in the system Si-As-Ag-Te-Se and becomes manifest in two glass transitions indicated by changes in the slopes of the expansion curves and breaks in the softening point-composition curves. The existence and behavior of Si-As-Ag-Te-Se glasses suggests the possible development of higher Tg infrared transparencies and higher Tg low band gap semiconductor glasses than described so far"--Abstract, page ii.

Advisor(s)

Kreidl, N. J.

Committee Member(s)

Sorrell, Charles A.
Robertson, B. Ken

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Sponsor(s)

United States. Office of Naval Research

Publisher

University of Missouri--Rolla

Publication Date

1972

Pagination

102 pages in various pagings

Note about bibliography

Includes bibliographical references (pages 59-61).

Rights

© 1972 Henry Edward Anthonis, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Tellurites
Metallic glasses
Polymers -- Thermal properties

Thesis Number

T 2831

Print OCLC #

6027775

Electronic OCLC #

904294709

Comments

Financial support provided by the Office of Naval Research under grant number N00014-69-A-0141-0003

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