Ceramics-Silikáty 45, (3) 115 - 118 (2001) |
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GLASSES IN THE B₂O₃-V₂O₅ SYSTEM OBTAINED BY FAST QUENCHING
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Iordanova Reni 1, Dimitriev Yanko 2, Kashchieva Elena 2,
Klissurski Dimitar 1
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1 Institute of General and Inorganic Chemistry
Bulgarian Academy of Sciences,
Sofia 1113, Bulgaria
2 University of Chemical Technology and Metallurgy,
Blvd. "Kl. Ohridski" 8,
Sofia 1756, Bulgaria
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Keywords: Glass formation, IR spectroscopy, Microstructure, Metastable phase separation
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Glass formation tendency in the B₂O₃-V₂O₅ system was investigated with different cooling rates (10² - 10⁵ K/s) of the melts.
Prepared glasses were characterized by X-ray phase analysis, differential thermal analysis (DTA), infrared spectroscopy (IR),
transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The existence of BO₃ and VO₅
structural units forming the glass network was proved. The microheterogeneous structure of the samples was observed in the
central region of the system by means of TEM and found to consist of V₂O₅ crystals, droplet - like formations and hydrate
products. |
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