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Proceedings Paper

High-temperature Raman spectra of nioboborate glass melts
Author(s): Quanzu Yang; Zhongcai Wang; Shizhuo Wang
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Paper Abstract

This paper describes the structure of glass melts in the Nb2O5-B2O3-K2O system by high-temperature Raman spectra. Because the authors had adopted a special high- temperature heating apparatus in our experimental work, the Raman spectra of the glass melts can be directly measured in the high-temperature state. The experimental results indicate that the groups of (NbO6)and (NbO4) will replace (BO3) and (BO4) and compose a new structural network by introducing Nb2O5 into boric glass. The (NbO4) belongs to the Td group; it has two IR activity modes and four Raman activity modes. The Nb in the structure is SP3 hybridized orbital and also has one residual electron; it belongs to the (NbO4) and forms a large (pi) bond. Under the influence of the heating field, the (pi) bond is very easy deformed. The Raman matrix element of (NbO4) in the 870 cm-1 is zero, but the dipole transition matrix element is comparatively stable. This shows that the structure skeleton does not collapse. The (NbO6) belongs to the Oh group; it loses Oh group symmetry in the high-temperature state, so the new scattering peaks appear. This research is very useful for the study and production of a new series of optical glasses. Through this work, the structural model of nioboborate glass melts had been established.

Paper Details

Date Published: 1 August 1991
PDF: 6 pages
Proc. SPIE 1513, Glasses for Optoelectronics II, (1 August 1991); doi: 10.1117/12.46031
Show Author Affiliations
Quanzu Yang, Changchun Institute of Optics and Fine Mechanics (China)
Zhongcai Wang, Changchun Institute of Optics and Fine Mechanics (China)
Shizhuo Wang, Changchun Institute of Optics and Fine Mechanics (China)

Published in SPIE Proceedings Vol. 1513:
Glasses for Optoelectronics II
Giancarlo C. Righini, Editor(s)

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