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SOME OPTICAL PROPERTIES OF BaO - PbO - B2O3 GLASSES

J. Schwarz1, H. Tichá1,*

Affiliation

  1. University of Pardubice, 532 10 Pardubice, Czech Republic

Abstract

Glasses from the system PbO-BaO-B2O3 with the value of the molar ratio R (= PbO/B2O3) in the interval 0.125 £ R £ 2.0, were prepared. The hydrostatic density, the softening temperature, Raman and infrared reflectivity spectra and transmittivity in the UV-VIS region of prepared glasses have been measured. The compositional dependence of experimental values of optical gap and refractive index were compared with the values calculated using the assumption of the additivity of the “local gaps” and Maxwell-Garnet theory, resp. The agreement is satisfactory. It is suggested also that in the region where 0.125 £ R £ ~ 0.6 the lead atoms behave rather as a network modifier, while at higher values of R the lead atoms behave as network formers..

Keywords

Borate glasses, Refractive index, Optical gap.

Submitted at: Jan. 28, 2003
Accepted at: March 12, 2003

Citation

J. Schwarz, H. Tichá, SOME OPTICAL PROPERTIES OF BaO - PbO - B2O3 GLASSES, Journal of Optoelectronics and Advanced Materials Vol. 5, Iss. 1, pp. 69-74 (2003)