Effect of B2O3 addition on the thermal properties and density of barium phosphate glasses |
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| Affiliation: | 1. Department of Engineering Sciences for Electronics and Materials, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasugakouen, Kasuga, Fukuoka 816-8580, Japan;2. Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan;1. Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA;2. Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, USA |
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| Abstract: | ![]()
Variations in glass transition temperature, onset of crystallization, thermal expansion coefficient, density and molar volume with B2O3 concentration were studied in a series of xB2O3–(100 − x)Ba(PO3)2 glasses with 0–10 mol% B2O3. DTA analysis and isothermal treatments for powdered glass samples reveal that ⩾7.5 mol% B2O3 addition suppresses surface crystallization during softening process. Raman spectroscopy suggests that the properties are related to the glass structure consisting of PO4 Q2 units with diborate and PO4–BO4 groups. |
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