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Glasses and glass-ceramics in the SrO-TiO-AlO -SiO-BO system and the effect of PO additions

Journal of Materials Science, ISSN: 1573-4803, Vol: 43, Issue: 10, Page: 3531-3538
2008
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Conference Paper Description

The glass formation abilities of various compositions in SrO-TiO -AlO-SiO, SrO-TiO -BO-SiO, SrO-TiO -AlO-BO, and SrO-TiO-AlO-SiO-B O systems were studied. Many new compositions were found to be suitable for the casting of crack-free, optically clear glasses of different color and with glass transition temperatures ranging from 595 to 775 °C. The crystallization behavior, structure, and thermal expansion behavior of selected glasses were analyzed by DTA, XRD, dilatometry, and heat treatment. The effect of PO on the glass structure and crystallization behavior was also studied. PO played a dual role depending on composition. In some glasses it acted as a nucleating agent while in others it suppressed crystallization. Heat treatment of borate and borosilicate glasses transformed them into glass-ceramics while comparable SrO-TiO-AlO-SiO glasses showed a lower tendency to crystallize and form glass-ceramics under the same conditions. © 2008 Springer Science+Business Media, LLC.

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