Effects of Fe2O3 and CuO on structural, thermal and optical properties of P2O5-ZnO-Na2O glass system

Abstract

In this work, the structural, thermal, and optical properties of 35P2O5-40ZnO-25Na2O −x Fe2O3 or y CuO (x = 0, 1, 1.5, 2, 2.5, 3 and y = 0, 1, 3, 4, 5) (mole ratio) glasses was studied. As the molar percentage of Fe2O3 and CuO increased, the hardness of the samples decreased. The DTA curves showed that with the increase of Fe2O3 and CuO percentage in the glass composition, the glass transition temperature also increased. Adding Fe2O3 to 3 mol% decreased the direct and indirect band gaps to 1.906 and 1.887 eV, respectively. The Urbach energy of samples containing CuO increased to 0.550 eV by increasing its amount to 5 mol. Also, the Fermi energy of glasses containing Fe2O3 and CuO decreased to 3.144 eV and 3.481 eV, respectively. The results showed that the synthesized samples act as band-pass filters in the visible region and band-stop filters in the ultraviolet region.

Keywords

• Phosphate glasses
• Bandstop filter
• UV- elimination
• Optical spectroscopy