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Raman and Infrared Spectroscopy of Yttrium Aluminum Borate Glasses and Glass-ceramicsRaman spectra of glasses and glass-ceramics in the Y2O3-Al2O3-B2O3 system are reported. Glasses with B2O3 contents ranging from 40 to 60 mole percent were prepared by melting 20 g of the appropriate oxide or carbonate powders in alumina crucibles at 1400 C for 45 minutes. Subsequent heat treatments of the glasses at temperatures ranging from 600 to 800 C were performed in order to induce nucleation and crystallization. It was found that Na2CO3 added to the melt served as a nucleating agent and resulted in uniform bulk crystallization. The Raman spectra of the glasses are interpreted primarily in terms of vibrations of boron - oxygen structural groups. Comparison of the Raman spectra of the glass-ceramic samples with spectra of aluminate and borate crystalline materials reveal that these glasses crystallize primarily as yttrium aluminum borate, YAl3(BO3)4.
Document ID
20000032284
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Bradley, J.
(Fisk Univ. Nashville,TN United States)
Brooks, M.
(Fisk Univ. Nashville,TN United States)
Crenshaw, T.
(Fisk Univ. Nashville,TN United States)
Morris, A.
(Fisk Univ. Nashville,TN United States)
Chattopadhyay, K.
(Fisk Univ. Nashville,TN United States)
Morgan, S.
(Fisk Univ. Nashville,TN United States)
Date Acquired
August 19, 2013
Publication Date
February 22, 1998
Publication Information
Publication: NASA University Research Centers Technical Advances in Aeronautics, Space Sciences and Technology, Earth Systems Sciences, Global Hydrology, and Education
Volume: 2 and 3
Subject Category
Inorganic, Organic And Physical Chemistry
Report/Patent Number
98URC138
Funding Number(s)
CONTRACT_GRANT: NCC8-133
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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