Tellurite And Fluorotellurite Glasses For Active And Passive

4. Thermal properties and glass stability; MDO 129
did not adversely affect glass stability. Stable ternary tungsten-tellurite glasses (+ Nb2O5
or Bi2O3) with high Tg values, were prepared which also show promise for infrared
waveguides, due to their improved durability over TZN glasses, and higher refractive
indices. Glass formation was shown for the first time in the system TeO2-Na2O-ZnF2,
with stability increasing and Tg deceasing with ZnF2 addition [10].
4.5. References
[1] S. W. Martin and C. A. Angell, "On the glass transition and viscosity of P2O5,"
Journal of Physical Chemistry, vol. 90, pp. 6736-6740, 1986.
[2] C. A. Angell, "Spectroscopy simulation and scattering, and the medium range
order problem in glass," Journal of Non-Crystalline Solids, vol. 73, pp. 1-17,
1985.
[3] R. F. Speyer, Thermal analysis of materials. New York: Marcel Dekker, 1994.
[4] P. W. Atkins, Physical Chemistry, 5th ed. Oxford: Oxford University Press, 1994.
[5] P. Rocabois, J. N. Pontoire, J. Lehmann, and H. Gaye, "Crystallization kinetics of
Al2O3-CaO-SiO2 based oxide inclusions," Journal of Non-Crystalline Solids, vol.
282, pp. 98-109, 2001.
[6] K. Nakashima, K. Noda, and K. Mori, "Time-temperature-transformation
diagrams for borosilicate glasses and preparation of chemically durable porous
glasses," Journal of the American Ceramic Society, vol. 80, pp. 1101-1110, 1997.
[7] L. E. Busse, G. Lu, D. C. Tran, and G. H. Sigel, "A combined DSC/optical
microscopy study of crystallization in fluorozirconate glasses upon cooling from
the melt," Materials Science Forum, vol. 5, pp. 219-228, 1985.
[8] H. Takebe, D. J. Brady, D. W. Hewak, and K. Morinaga, "Thermal properties of
Ga2S3-based glass and their consideration during fiber drawing," Journal of Non-
Crystalline Solids, vol. 258, pp. 239-243, 1999.
[9] S. X. Shen, M. Naftaly, and A. Jha, "Crystallization kinetics of tellurite glasses
studied by DSC and DTA," Glass Science and Technology-Glastechnische
Berichte, vol. 73, pp. 111-118, 2000.