Longitudinal elastic constants of tellurite glasses

Abstract

The aim of the present work is to attempt to make a number of different glasses, based on tellurite as the principal former, which contain substantial quantities of zinc oxide up to 40 mol % ZnO. To study the longitudinal elastic properties, measurements have been made of the velocity of the longitudinal ultrasonic waves propagated through the prepared glasses. The results indicate that the longitudinal elastic constants depend strongly upon the composition of the prepared glasses. A detailed qualitative interpretation of the increase in the modulus is made. Information about the structure of the glass can be deduced after calculating the number of network bonds per unit volume and the crosslink density. The role of the halogen inside the glass network is discussed.

Optical and acoustic properties of TeO2/WO3 glasses with small amount of additive ZrO2

“…El Mallawany [23] summarized data on the refractive index, n, and densities, r, of some tellurite glasses. He attributed the higher values of refractive indices due to the higher values of the density [i.e.…”

Structural, mechanical and optical investigations in the TeO2-rich part of the TeO2–GeO2–ZnO ternary glass system

“…Previous studies focused on the mechanical properties of binary zinc tellurite glasses (100-x)TeO 2 -xZnO allowed evidencing that zinc oxide participates in the glass network and contributes in the increase in glass rigidity [23,24].…”

Effects of concurrent TeO2 reduction and ZnO addition on elastic and structural properties of (90−x)TeO2–10Nb2O5–(x)ZnO glass

“…Ultrasonic longitudinal and shear velocity measurements can be very important tools to investigate elastic property of glasses as ultrasonic velocity is related to elastic moduli whose changes can be associated, among others, to microstructural differences [13,[41][42][43], structural stability [44][45][46][47], formation of glass network [13,17,48,49] and rigidity [14]. In binary TeO 2 -ZnO glass system increase in ZnO resulted in higher network rigidity and subsequently increase in longitudinal modulus [17,50] while in (100−x)TeO 2 -(x)Nb 2 O5 glass an increase in longitudinal velocity was observed with increase in Nb 2 O 5 [51]. Although several elastic studies have been reported for ternary tellurite glasses such as TeO 2 - [14], TeO 2 -WO 3 -PbO [41,47], [54], and (TeO 2 ) 50 -(V 2 O 5 ) 50−x (TiO 2 ) x [55], to our knowledge ultrasonic measurements on TeO 2 -Nb 2 O 5 -ZnO system has not been reported.…”