Enhancement of optical and mechanical properties of sodium silicate glasses using zirconia
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Enhancement of optical and mechanical properties of sodium silicate glasses using zirconia E. A. Abdel Wahab1 · Kh. S. Shaaban2 · El Sayed Yousef3,4 Received: 11 April 2020 / Accepted: 29 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Ternary glass system with the composition of 5 0Na2O–(50–x) SiO2–x ZrO2, (0 ≤ x ≤ 20 mol %) has been prepared by melt quenching method. The structure changes of these glasses are studied by FT-IR spectra. The mechanical properties have been related to the results of FT-IR spectra. X-ray diffractograms showing the amorphous nature of these glasses. The mechanical properties of these glasses are studied and their elastic-moduli have been estimated. It was noted that the elastic-moduli, density and some physical properties of these samples are increased. Optical feature spectra are recorded at room temperature. The dispersion parameters as refractive index (n) and extinction coefficient (k) are determined in the wavelength range of 300–2500 nm. Energy band gap and Urbach energy with indirect allowed transitions are estimated using Tauc model. The dielectric constant in term of real and imaginary parts are investigated. Other physical parameters like skin depth, cut-off wavelength, dissipation factor, optical and electrical conductivities are calculated as well. Keywords ZrO2 glasses · FTIR · Mechanical features · UV-visible · Dielectric constant
1 Introduction The glass is a very important material in our life because it is involved in many applications and technologies. So, the glass industry established to develop various compounds to daily use. Nevertheless, most of the known glasses are silicate- based. Silicate glasses are highly bond strength and smaller cation extent so, it is the better glass former. Transition oxide (TO) decrease the viscosity of silicate glasses by added the alkalis as well as
* E. A. Abdel Wahab [email protected]; [email protected] 1
Department of Physics, Faculty of Science, Al-Azhar University, P.O. 71524, Assiut, Egypt
2
Chemistry Department, Faculty of Science, Al-Azhar University, P.O. 71524, Assiut, Egypt
3
Physics Department, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
4
Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
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decreasing the melting temperature. The alkali silicate glasses are formed if the percent of silicate and alkali is 1:1. The addition of alkali as sodium break the Si–O–Si bond and form the Si–O–Na bond. Na2SiO3 glass is the most used glasses because it is economy, and easy to construct. ZrSiO4 glasses have a significant role technology because it is highly chemical durability and its non-toxicity. Adding zirconium oxide to silicate glasses changes the physical properties as thermal expansion coefficient and glass transition temperature. Also, to increase the density, refractive
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