Elastic Behavior of Borate Glasses Containing Lead and Bismuth Oxides

binary borate glasses with different compositions, (MO) (B 2 O 3 ) 1− (M = Pb, Bi), have been characterized and ultrasonic velocity as well as density is taken into account. In addition, the results have been compared with those of Ag, K, and Li oxide borate glasses from others. The ultrasonic velocities (both longitudinal and transverse) and density for (PbO) (B 2 O 3 ) 1− and (Bi 2 O 3 ) (B 2 O 3 ) 1− have been measured accurately and elastic moduli as well as hardness and Poisson's ratio was determined. It has been demonstrated that density and ultrasonic velocities are enhanced by increasing PbO and Bi 2 O 3 molar fraction with different values for each borate glass composition. However, the enhancement of ultrasonic velocities did not carry on continuously and after reaching a maximum point, they fell down dramatically. Both PbO and Bi 2 O 3 showed almost similar glass improvement in case of density, ultrasonic velocity, and elastic moduli

Elastic Behavior of Borate Glasses Containing Lead and Bismuth Oxides

PbO and Bi2O3 binary borate glasses with different compositions, (MO)X(B2O3)1−X (M = Pb, Bi), have been characterized and ultrasonic velocity as well as density is taken into account. In addition, the results have been compared with those of Ag, K, and Li oxide borate glasses from others. The ultrasonic velocities (both longitudinal and transverse) and density for (PbO)X(B2O3)1−X and (Bi2O3)X(B2O3)1−X have been measured accurately and elastic moduli as well as hardness and Poisson’s ratio was determined. It has been demonstrated that density and ultrasonic velocities are enhanced by increasing PbO and Bi2O3 molar fraction with different values for each borate glass composition. However, the enhancement of ultrasonic velocities did not carry on continuously and after reaching a maximum point, they fell down dramatically. Both PbO and Bi2O3 showed almost similar glass improvement in case of density, ultrasonic velocity, and elastic moduli

Effect of Concurrent ZnO Addition and AlF3 Reduction on the Elastic Properties of Tellurite Based Glass System

New ternary zinc oxyfluorotellurite (ZOFT) with the composition (ZnO)x-(AlF3)y-(TeO2)z, where 5≤x<35; 5≤y≤25; 60≤z≤70, has been successfully prepared by the conventional rapid melt quenching technique. Density, molar volume, and glass transition temperature have been assessed for each ZOFT glass sample. The longitudinal and transverse ultrasonic waves propagated in each glass sample were measured using a MBS8020 ultrasonic data acquisition system at 5 MHz frequency and room temperature. The longitudinal modulus (L), shear modulus (G), Young’s modulus (E), bulk modulus (K), and Poisson’s ratio (σ) are assessed from both velocity data and their respective density. The compositional dependence of the ultrasonic velocities and related parameters are discussed to understand the rigidity and compactness of the glass system studied

Correction: Effect of AlF3 on the Density and Elastic Properties of Zinc Tellurite Glass Systems. Materials 2012, 5, 1361-1372.

Due to an oversight, the data of the last column “Vs” in Table 1 was missing in the original version of this article [1]. [...

Effect of AlF&lt;sub&gt;3&lt;/sub&gt; on the Density and Elastic Properties of Zinc Tellurite Glass Systems

This paper presents the results of the physical and elastic properties of the ternary zinc oxyfluoro tellurite glass system. Systematic series of glasses (AlF&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;x&lt;/sub&gt;(ZnO)&lt;sub&gt;y&lt;/sub&gt;(TeO&lt;sub&gt;2&lt;/sub&gt;)&lt;sub&gt;z &lt;/sub&gt;with x = 0–19, y = 0–20 and z = 80, 85, 90 mol% were synthesized by the conventional rapid melt quenching technique. The composition dependence of the physical, mainly density and molar volume, and elastic properties is discussed in term of the AlF&lt;sub&gt;3&lt;/sub&gt; modifiers addition that are expected to produce quite substantial changes in their physical properties. The absence of any crystalline peaks in the X-ray diffraction (XRD) patterns of the present glass samples indicates the amorphous nature. The addition of AlF&lt;sub&gt;3&lt;/sub&gt; lowered the values of the densities in ternary oxyfluorotellurite glass systems. The longitudinal and transverse ultrasonic waves propagated in each glass sample were measured using a MBS8020 ultrasonic data acquisition system. All the velocity data were taken at 5 MHz frequency and room temperature. The longitudinal modulus (L), shear modulus (G), Young’s modulus (E), bulk modulus (K) and Poisson’s ratio () are obtained from both velocities data and their respective density. Experimental data shows the density and elastic moduli of each AlF&lt;sub&gt;3&lt;/sub&gt;-ZnO-TeO&lt;sub&gt;2&lt;/sub&gt; series are found strongly depend upon the glass composition. The addition of AlF&lt;sub&gt;3&lt;/sub&gt; modifiers into the zinc tellurite causes substantial changes in their density, molar volume as well as their elastic properties