Temperature shift of the optical gap in some PbO-ZnO-P2O5 glasses |
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| Authors: | J Schwarz L Tichy |
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| Affiliation: | a University of Pardubice, Faculty of Chemical Technology, 532 10 Pardubice, Czech Republic
b Joint Laboratory of Solid State Chemistry of the Institute of Macromolecular Chemistry of the Academy of Sciences of the Czech Republic and the University of Pardubice, 532 10 Pardubice, Czech Republic |
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| Abstract: | The optical gap (Eg) between 4.54 eV-4.88 eV at room temperature was determined for PbO-ZnO-P2O5 glasses with the formal content of P2O5 in the region of 30 to 50 mol% and with the formal content of PbO in the region of 50 to 45 mol%, respectively. The temperature (T) dependence of the optical gap (Eg(T)) in the region 80 < TK] < 600 was determined, and an electron-phonon interaction is suggested to be a major contribution to the temperature shift of the optical gap. In the temperature region of 300-600 K, the Eg(T) dependence can be approximated by a simple linear relation with the temperature coefficient (γ) of the optical gap in the region 6.04 ≤ γ × 104 eV/K] ≤ 7.39. |
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| Keywords: | Glasses Optical materials and properties |
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