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SOME PROPERTIES OF (PbO)x (ZnO)15(P2O5)85-x GLASSES
Authors: Kotková Kateřina | Tichá Helena | Tichý Ladislav
Year: 2007
Type of publication: článek v odborném periodiku
Name of source: Journal of Optoelectronics and Advanced Materials
Publisher name: National Institute of Optoelectronics
Place: Bukurešť
Page from-to: 36-41
Titles:
Language Name Abstract Keywords
cze SOME PROPERTIES OF (PbO)x (ZnO)15(P2O5)85-x GLASSES Eight glasses were prepared along the line (PbO)x (ZnO)15(P2O5)85-x. An increase in the density (3.23 < d[g/cm3] < 5.42), in the glass transition temperature (278 < Tg [° C] < 372), in the refractive index (1.56 < n < 1.79), and a decrease in the optical gap (5.39 &#8805; Eg [eV ] &#8805; 4.65), respectively, was observed with an increase in PbO content. Raman spectra of glasses studied give evidence for phosphate network depolymerisation due to substitution of P2O5 by PbO. The temperature (T) dependence of the optical gap (Eg(T)) in the region 300 < T[K] < 600 was determined and approximated by a simple linear relation (Eg(T) = Eg(T&#8594;0) ? &#947;T) with the temperature coefficient (&#947;) of the optical gap in the region 4.91 < &#947; x104 [eV/K] < 6.55, respectively. Phosphate glasses;Raman spectroscopy;optical properties
eng SOME PROPERTIES OF (PbO)x (ZnO)15(P2O5)85-x GLASSES Eight glasses were prepared along the line (PbO)x (ZnO)15(P2O5)85-x. An increase in the density (3.23 < d[g/cm3] < 5.42), in the glass transition temperature (278 < Tg [° C] < 372), in the refractive index (1.56 < n < 1.79), and a decrease in the optical gap (5.39 &#8805; Eg [eV ] &#8805; 4.65), respectively, was observed with an increase in PbO content. Raman spectra of glasses studied give evidence for phosphate network depolymerisation due to substitution of P2O5 by PbO. The temperature (T) dependence of the optical gap (Eg(T)) in the region 300 < T[K] < 600 was determined and approximated by a simple linear relation (Eg(T) = Eg(T&#8594;0) ? &#947;T) with the temperature coefficient (&#947;) of the optical gap in the region 4.91 < &#947; x104 [eV/K] < 6.55, respectively. Phosphate glasses;Raman spectroscopy;optical properties

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