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Some properties of (PbO)x (ZnO)15(P2O5)85-x glasses

K. KOTKOVÁ1, H. TICHÁ1,* , L. TICHÝ2

Affiliation

  1. Faculty of Chemical Technology, University of Pardubice, 532 10 Pardubice, Czech Republic
  2. Joint Laboratory of Solid State Chemistry of Institute of Macromolecular Chemistry of the Academy of Sciences of the Czech Republic and the University of Pardubice, 532 10 Pardubice, Czech Republic

Abstract

Eight glasses were prepared along the line (PbO)x (ZnO)15(P2O5)85-x. An increase in the density (3.23 ≤ ρ[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 ≥ Eg [eV ] ≥ 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→0) – γT) with the temperature coefficient (γ) of the optical gap in the region 4.91 ≤ γ x104 [eV/K] ≤ 6.55, respectively..

Keywords

Phosphate glasses, Raman spectroscopy, Optical properties.

Citation

K. KOTKOVÁ, H. TICHÁ, L. TICHÝ, Some properties of (PbO)x (ZnO)15(P2O5)85-x glasses, Optoelectronics and Advanced Materials - Rapid Communications, 1, 1, January 2007, pp.36-40 (2007).

Submitted at: Jan. 5, 2007

Accepted at: Jan. 12, 2007