Effects of Ag NPs: Enhancement of Mechanical Properties of Er³+/Nd³+ Codoped Lithium Niobate Tellurite Glass via Ultrasonic Measurement

Ag NPs embedded in Er³+/Nd³+ codoped lithium niobate tellurite glasses of the form (68-x)TeO₂-15Li₂CO₃-15Nb₂O₅-1Er2O3-1Nd2O3-(x)AgCl with x = 1, 2 and 3 mol% via conventional melt-quenching technique. Surface roughness and mechanical properties of the glass sample are characterized and discussed. The ultrasonic attenuation shows the rate of sound energy reduction when an ultrasonic wave is propagating in a medium which is the lithium niobate tellurite glasses. The glass attenuation depends on the grain size, viscous friction, crystal structure, porosity, and hardness. The ultrasonic acoustic impedance and attenuation coefficient of particles are estimated from an analysis of the pulse-echo technique. Simple correlation functions and the accurate scattering theory include the effects of acoustic waves, were used separately to focus on the absorption and scattering effects from spherical particles (Ag NPs) and thereby describe the structures of the medium. (paper)