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Glasses of the system: xBi 2 O 3 –(100−x)B 2 O 3 (x=20 to 66mol%) were prepared and characterized by density, DSC, UV–visible absorption and 11 B MAS-NMR spectroscopy. Glass molar volume increases while the glass transition temperature decreases with Bi 2 O 3 concentration. Densities of some bismuth borate glasses are found to be greater or very...
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