Masters Theses
Abstract
"A series of cesium phosphate glasses, XCs2O·(1-X)P2O5, where X ≤ O.60 were prepared. The addition of ~ 16% mole Cs2O to P2O5 decreases the glass transition temperature (Tg ) by 156K. Tg increases by 25K with the further addition of cesium oxide up to 60 mole% CS2O. The density of V-P2O5 is 2.39 g/cm3, and with cesium oxide additions the cesium phosphate glass density increases monotonically to 3.88 g/cm3 (59.1 mole% Cs2O). The 31P magic angle spinning nuclear magnetic resonance (MAS NMR) spectra show that the addition of Cs2O causes a continuous conversion of the 3D ultraphosphate network to the chain metaphosphate structure. There is a break in the Q2 isotropic chemical shift (δiso) at ~35 mole% Cs2O. The 133Cs MAS NMR spectra show a 90 ppm increase in δiso, which indicates a decrease in the average electron density around the cesium, more covalent Cs-O bonding, and a shorter average Cs-O bond length. The Raman data indicates a conversion of the 3D phosphate glass network to a chain metaphosphate glass structure with the addition of Cs2O. The properties and spectroscopic results are interpreted using a structural model that considers the effects of composition on the average coordination environments of cesium ions"--Abstract, page 2.
Advisor(s)
Brow, Richard K.
Committee Member(s)
Day, D. E.
Blum, Frank D.
Department(s)
Materials Science and Engineering
Degree Name
M.S. in Ceramic Engineering
Publisher
University of Missouri--Rolla
Publication Date
Spring 2000
Pagination
ix, 102 pages
Note about bibliography
Includes bibliographical references.
Rights
© 2000 Carol Ann Click, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Thesis Number
T 7723
Print OCLC #
44637690
Electronic OCLC #
1104791302
Recommended Citation
Click, Carol A., "Properties and structures of cesium phosphate glasses" (2000). Masters Theses. 1909.
https://scholarsmine.mst.edu/masters_theses/1909
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Comments
Financial support of Sandia National Labs and the Appleyard Fund (UMR) is gratefully acknowledged. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-AS04-94AL8500.