Viscosity properties of tellurite-based glasses

Journal Article · Wed Dec 15 04:00:00 EST 2010 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2010.09.008· OSTI ID:22209950

Tincher, B.; Massera, J. ^[1]; Richardson, K. ^[1]

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1. School of Materials Science and Engineering, COMSET, Clemson University, Clemson, SC 29631 (United States)

The viscosity behavior of glasses with the composition (90-x)TeO{sub 2}-10Bi{sub 2}O{sub 3}-xZnO with x = 15, 17.5, and 20 (TBZ glasses) and 80TeO{sub 2}-(20-y)Na{sub 2}O-yZnO system with y = 0, 5, and 10 (TNZ glasses) have been measured as a function of temperature using a beam-bending (BBV) and a parallel-plate (PPV) viscometer. The structure of the glass' network has been characterized using Raman spectroscopy and has been related to the viscosity temperature behavior and the fragility parameter (m) of the glasses. As the concentration of ZnO in the TBZ system (x) increases, the fragility parameter of the glass increases, whereas it decreases with an increase of the ZnO concentration (y) in the TNZ system. In both glasses, these variations in m have been related to the partial depolymerization of the tellurite network associated with the level of modifier content. The depolymerization of the tellurite network is believed to be the result of a reduction in the number of [TeO{sub 4}] units and the formation of [TeO{sub 3}] and [TeO{sub 3+1}] units that occurs with a change in TeO{sub 2} content in the TBZ system and modifier content in the TNZ system.

• OSTI ID: 22209950
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 12 Vol. 45; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DEPOLYMERIZATION
GLASS
RAMAN SPECTROSCOPY
TELLURIUM OXIDES
TEMPERATURE DEPENDENCE
VISCOSITY
ZINC OXIDES