Effect of tungsten oxide to the structural and elastic properties of alumina lead tellurite glass system (Al2O3-PbO-TeO2)

Shaari, Nur Aqilah (2022) Effect of tungsten oxide to the structural and elastic properties of alumina lead tellurite glass system (Al2O3-PbO-TeO2). [Project Paper] (Submitted)

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Abstract

The production of tungsten oxide alumina lead tellurite glasses at different compositions added according to the empirical formula x(WO3)-5(Al2O3)-15(PbO)-80-x(TeO2) with x = 0, 5, 10, 15, and 20 mol % were prepared by using the melt quenching technique and investigated by XRD, ultrasonic velocities, density, molar volume, and the properties of structural and elastic model. The physical parameters of the glasses were determined by density and molar volume using the Archimedes method, while the elastic properties were determined by XRD and ultrasonic velocities. XRD confirmed the amorphous WO3- Al2O3-PbO-TeO2 glass structure, a broad halo peak at a lower angle ≈ 20°- 27° and continuous sharp peak not found were observed in glass system. From the density measurement, the addition of WO3 observed has increase the density from 6.232 to 6.847 g/cm3 and the molar volume decreased from 26.68 to 26.44cm3 /mol of the glasses. In addition, the OPD is increased from 71.22 to 79.57 mol/cm3. The elastic properties approximated from measured shear (VS) and longitudinal (VL) ultrasonic velocities increased from 1600 to 1813 cm-1 and from 2823 to 3289 cm-1, when WO3 content increased from 0 to 20 mol%. Meanwhile, the longitudinal (L), shear (G), bulk (K) and Young’s (E) modulus increased from 49.66 to 74.07 GPa, 15.95 to 22.51 GPa, 28.39 to 44.06 GPa and 40.19 and 57.63 GPa, respectively. The Poisson’s ratio also increased from 0.263 to 0.282 and micro hardness increased from 2.514 to 3.267 GPa. Estimated parameters based on Makishima–Mackenzie theory and Rocherulle theory calculated in order to analyse the correlation between them. Makishima–Mackenzie model, the longitudinal (Lm), shear (Gm), bulk (Km) and Young’s (Em) modulus increased from 25.27 to 27.31 GPa, 8.75 to 9.88 GPa, 10.67 to 12.06 GPa and 23.15 and 26.54 GPa. Besides, the values of micro hardness (Hm) and Poisson’s ratio (σm) also increased from 1.18 to 3.11 GPa and 0.219 to 0.247. For Rocherulle model, longitudinal (Lr), shear (Gr), bulk (Kr), Young’s (Er) modulus increased from 34.01 to 36.83 GPa, 9.95 to 11.32 GPa, 13.21 to 14.76 GPa and 20.26 to 23.94 GPa. Similarly, the micro hardness (Hr) and Poisson’s ratio (σr) also increased from 1.04 to 2.12 GPa and 0.284 to 0.410. The results of XRD, ultrasonic velocities and elastic moduli evidenced the formation of WO3- Al2O3-PbO-TeO2 glass system and potentially used in the fields of photonics as laser diode.

Item Type:	Project Paper
Faculty:	Fakulti Sains
Depositing User:	Ms. ROHANA ALIAS
Date Deposited:	05 Jun 2024 23:35
Last Modified:	05 Aug 2024 09:11
URI:	http://psaspb.upm.edu.my/id/eprint/1897

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