Abstract
Ternary Zinc-Sodium-Phosphate glasses doped with copper of the composition 40ZnO-(20-x) Na<sub>2</sub>O-40P<sub>2</sub>O<sub>5</sub>-xCu<sub>2</sub>O where x =0, 2, 4, 6, 8 mol % were prepared by the tradition quenching method. The effect of Cu ions on density, molar volume and microhardness has been investigated. FTIR was measured in the range (400-1600) cm-1 to investigate the effect of Cu ion on the structure of the studied glass. Longitudinal and shear velocities were measured for the studied glass using pulse echo technique. Elastic properties such as longitudinal modulus, shear modulus, bulk modulus, and Young’s modulus, Poisson’s ratio) and some physical parameters such as softening temperature, hardness, Debye temperature have been calculated. The ultrasonic results and the other measured parameters indicate the Cu ion increase the cross-link density by the formation of P-O-Cu. All the measurements are measured at room temperature.
Highlights
Due to the unique properties of phosphate glasses, such as high thermal expansion coefficient, low melting, softening and transition temperatures, high electrical conductivity, ultraviolet and far infrared transmission and other optical characteristics, make them of great scientific and technical interest for many applications [1,2,3,4]
With the Addition of ZnO to phosphate glass has an effect on the chemical durability and other properties that, when it adds as a modifier, it increases the cross-link between phosphate anions, inhabiting hydration reaction [8, 9]
The band at 750 cm-1 which is attributed to P-O-P symmetric band is slightly shifted to higher wavenumber as Cu2O content increase from glass G0to G8
Summary
Due to the unique properties of phosphate glasses, such as high thermal expansion coefficient, low melting, softening and transition temperatures, high electrical conductivity (with the addition of transition metal ions), ultraviolet and far infrared transmission and other optical characteristics, make them of great scientific and technical interest for many applications [1,2,3,4]. The addition of one or more of the transition metal oxide to phosphate glass has improved the chemical durability [7]. Copper can exist in two states, as divalent Cu2+ which give the glass color from blue to green depending on its concentration or monovalent Cu+ (Cuprous) which doesn’t produce color because its five dorbital occupied or containing both states. Their ratio of Cu+ and Cu2+ depending on the type of glass former, composition and thermal history (such as environment, melting temperature, and melting time) [12]. Cu2+ ions doped glasses have shown a great importance because of their optical stability and variable optical and electrical applications [13, 14]
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