"Clear glasses form in the system Ag₂O-B₂O₃ up to about 35 mol.% (65 wt.%) Ag₂O. Infrared absorption, thermal expansion and density data indicated an analogy to the Na₂O-B₂O₃ system. Pentaborate-triborate group pairs appear to be formed upon the addition of Ag₂O to B₂O₃ up to 20 mol.% Ag₂O and diborate groups from 20 to 33 mol.% Ag₂O. This interpretation is supported by the comparison of the infrared absorption spectra of quenched and crystallized glasses. One crystallization product ,Ag₂O.4B₂O₃, has been identified previously. A new compound starts to appear at 28 mol.% Ag₂O. Silver is generally present as a network modifier like sodium. This was substantiated by the comparison of the molar volume of sodium and silver borate glasses. Above 27 mol.% Ag₂O some atomic silver is assumed to be present. Below 15 mol.% Ag₂O exploratory studies indicate a two-phase structure within an immiscibility gap. A low temperature internal friction peak in the glasses up to 28 mol.% Ag₂O corresponds with the alkali peak in other glasses; a high temperature peak appearing in the 34 mol.% Ag₂O glass is associated with the appearance of non-bridging oxygen in the system"--Abstract, page iii.
Kreidl, N. J.
McDonald, H. O. (Hector O.)
Sorrell, Charles A.
Day, D. E.
Moore, Robert E., 1930-2003
Materials Science and Engineering
Ph. D. in Ceramic Engineering
National Science Foundation (U.S.)
University of Missouri--Rolla
x, 88 pages
© 1971 Edward Nashed Boulos, All rights reserved.
Dissertation - Open Access
Library of Congress Subject Headings
Borates -- Research
Silver compounds -- Effect of temperature on
Glass -- Heat treatment
Borates -- Spectra
Internal friction -- Measurement
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Boulos, Edward Nashed, "Structure and properties of silver borate glasses" (1971). Doctoral Dissertations. 2280.