Som, Tirtha and Karmakar, Basudeb (2009) Structure and Properties of Low Phonon Antimony Glasses in the K(2)O-B(2)O(3)-Sb(2)O(3)-ZnO System. Journal of the American Ceramic Society, 92 (10). pp. 2230-2236. ISSN 0002-7820

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The monolithic glass-forming region of the low phonon and low softening point antimony glasses containing high Sb(2)O(3) (40-75 mol%) in the novel quaternary K(2)O-B(2)O(3)-Sb(2)O(3)-ZnO system has been found with the help of X-ray diffraction (XRD) analysis. The structure of a series of glasses with the general composition of (mol%) 15K(2)O-15B(2)O(3)-(70-x) Sb(2)O(3)-xZnO (where x=5-25) has been evaluated by infrared reflection spectral (FT-IRRS) analyses. All the glasses are found to possess a low phonon energy of around 600 cm(-1), as revealed by FT-IRRS. Their softening point (T(s)), glass transition temperature (T(g)), and coefficient of thermal expansion (CTE) have been found to vary in the ranges of 351 degrees-379 degrees C, 252 degrees-273 degrees C, and 195-218 x 10(-7) K(-1), respectively. These properties are found to be controlled by their fundamental property, like the covalent character of the glasses, which is found to increase with an increase in Sb(2)O(3) content. In addition, the devitrified glasses have been characterized by XRD and field emission scanning electron microscopy, which manifests the presence of nanozinc antimony oxide crystals with sizes of 21-43 nm. The exhibited properties have revealed that they are a new class of versatile materials.

Item Type: Article
Subjects: Glass
Divisions: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 02 Mar 2012 07:41
Last Modified: 02 Mar 2012 07:41

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