Optical Properties of SiO2 – TiO2 – La2O3 – Na2O – Y2O3 Glasses and A Novel Process of Preparing the Parent Glass-Ceramics

A F Abd El-Rehim,E A Abdel Wahab,Kh S Shaaban,M M Abou Halaka

doi:10.1007/s12633-021-01002-w

A F Abd El-Rehim, E A Abdel Wahab + Show 2 more

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https://doi.org/10.1007/s12633-021-01002-w

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Abstract

Quaternary glasses with the composition 50SiO2 – 25TiO2 – 5La2O3 – (20-x) Na2O – xY2O3 where x : (0 ≤ x ≥ 10) were synthesized using the melt-quench technique. XRD examined the nature of prepared glasses. UV-spectroscopic of investigated glass system studied at room temperature. Both optical bandgap and refractive index of the present glass have been increased. The polarizability and basicity were determined. Thermal parameter values increased as Y2O3 increased. Under controlling heat, the glass-ceramic were prepared and confirmed using XRD. Glass-ceramics are examined using SEM to evaluate a microstructure. Ultrasonic velocities and elastic-moduli of glass-ceramic samples are increased because of the increase in internal energy. The role of Y2O3 modifier in the glass system is clearly demonstrated. Y2O3 also works as an excellent nucleating agent that can induce crystallizations, supporting in the creation of the sub-phase of glass-ceramics.

Highlights

TiO2 containing glasses show remarkable properties like low phonon frequency, high dielectric, non-linear optical, electric, and magnetic
Glass-ceramics can exert other unusual characteristics that are valuable for purposes, as shown by the incredibly small thermal expansion coefficient, which is acceptable for thermal shockresistant implementations
3- With increasing Y2O3 content the energy gap increases. This grow can be explained as oxygen bridges (BO) are generated that bind energized electrons more strongly than non-bridging oxygen (NBO)

Summary

Introduction

TiO2 containing glasses show remarkable properties like low phonon frequency, high dielectric, non-linear optical, electric, and magnetic. Under these characteristics glass doped TiO2 has extend applications in the field of optics, photonics, optoelectronics, and telecommunication devices. The incorporation of transitional or rare earth oxides into sodium titanium silicate glass structures are enhanced optical, electrical, thermal, mechanical and radiation protection characteristics [22,23,24,25]. The crystallization behavior and the final properties of glass ceramics parts are mainly affected by the configuration of the parental glass, the nucleating system, and the crystallization conditions. The goal of our article is preparing of lanthanum titanium silicate glasses containing yttrium and investigating their structural and optical properties. The model (JEM-100 CX 11 JAPAN), a scanning microscope (SEM), has been used to examine the morphology of investigated glass-ceramic

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