Elastic properties of lead-phosphate glasses doped with erbium trioxide

2008 ◽  
Vol 86 (11) ◽  
pp. 1349-1352 ◽  
Author(s):  
B Eraiah ◽  
D Geetha ◽  
R V Anavekar
Keyword(s):  
Elastic Properties ◽  
Ultrasonic Pulse ◽  
Phosphate Glasses ◽  
Lead Phosphate ◽  
Increase With Increase ◽  
Debye Temperatures ◽  
Structure Of Glasses ◽  
Increasing Trend ◽  
Pulse Echo ◽  
62.20 Dc

The elastic properties of xEr2O3·(50 – x) PbO·50P2O5 (x = 0.1 to 0.5 mol%) glasses are investigated using ultrasonic pulse-echo measurements and their elastic properties are characterized at room temperature. Results from the studies show that both longitudinal and transverse velocities increase with increase of Er2O3 concentration. The elastic constants C11, C12, C44, and Young’s modulus show increasing trend while Bulk modulus and Poisson’s ratio show an increasing trend up to 0.4 mol% and 0.3 mol% of Er2O3, respectively, then there is sudden decreasing trend observed. But in the case of Debye temperatures the reverse trend has been observed. Another notable observation is that the glass with 0.4 mol% and 0.5 mol% of Er2O3 concentration exhibits high velocities and high elastic moduli. This behavior of the elastic properties is related to the change in the structure of glasses as well as the interatomic bonding.PACS No.: 62.20.DC

Elastic properties ofGd5Si2Ge2studied with an ultrasonic pulse-echo technique

2006 ◽  
Vol 74 (18) ◽  
Author(s):  
O. Svitelskiy ◽  
A. Suslov ◽  
D. L. Schlagel ◽  
T. A. Lograsso ◽  
K. A. Gschneidner ◽  
...  
Keyword(s):  
Elastic Properties ◽  
Ultrasonic Pulse ◽  
Pulse Echo

Mechanical and Optical Properties for Li2O–ZnO–P2O5:xYb2O3 Glasses

2017 ◽  
Vol 6 (1) ◽  
pp. 163-170 ◽  
Author(s):  
M. A. Algradee ◽  
A. Elwhab. B. Alwany ◽  
A. A. Higazy
Keyword(s):  
Absorption Spectra ◽  
Fundamental Absorption Edge ◽  
Ultrasonic Pulse ◽  
Phosphate Glasses ◽  
Ultraviolet Region ◽  
Absorption Bands ◽  
Young’S Moduli ◽  
Quenching Method ◽  
Doped Glass ◽  
Pulse Echo

The Yb3+-doped Lithium-Zinc-Phosphate glasses were prepared by means of conventional melt quenching method. The elastic moduli of the entire vitreous range of this doped glass system have been measured by the ultrasonic pulse-echo technique at 4 MHz. The ultrasonic wave velocities, the bulk, shear, longitudinal and Young's moduli are found to be rather sensitive to the Yb2O3 wt% content. The infrared absorption spectra were recorded in the frequencies range 4000 to 400 cm–1. Absorption bands and mode attributions have been fully discussed. Absorption midband positions and intensities are found to be strongly dependent on Yb2O3 wt%. The optical absorption spectra in the visible and ultraviolet region were recorded at room temperature. The obtained results showed that a gradual shift in the fundamental absorption edge toward longer wavelengths occurred and it is observed that the values ofEopt. are decreased and ΔE increased with the increase of Yb2O3 wt% content.

scholarly journals Elastic Properties of Sn-Based Pb-Free Solder Alloys Determined by Ultrasonic Pulse Echo Method

2005 ◽  
Vol 46 (6) ◽  
pp. 1271-1273 ◽  
Author(s):  
Hiroyuki Tanaka ◽  
Lang Feng Qun ◽  
Osamu Munekata ◽  
Toshihiko Taguchi ◽  
Toshio Narita
Keyword(s):  
Elastic Properties ◽  
Ultrasonic Pulse ◽  
Solder Alloys ◽  
Free Solder ◽  
Pulse Echo ◽  
Pulse Echo Method

Elastic Properties of Vanadium Doped Silica-Borotellurite Glasses

2020 ◽  
Vol 307 ◽  
pp. 321-326
Author(s):  
Nurhayati Mohd Nor ◽  
Halimah Mohamed Kamari ◽  
Amirah Abdul Latif ◽  
Nurisya Mohd Shah
Keyword(s):  
Elastic Properties ◽  
Room Temperature ◽  
Elastic Moduli ◽  
Molar Fraction ◽  
Glass Network ◽  
Ultrasonic Pulse ◽  
Ultrasonic Velocities ◽  
Wave Velocities ◽  
Network Glass ◽  
Pulse Echo

Silica borotellurite glasses doped with different molar fraction of V2O5 have been prepared by melt quenching technique. The elastic properties of {[(TeO2)0.7 (B2O3)0.3]0.8(SiO2)0.2}(1-x)(V2O5)x glasses are investigated using ultrasonic pulse echo measurements and their elastic properties have been characterized at room temperature. The density of the glasses was measured by Archimedes method using distilled water as buoyant liquid. The ultrasonic wave velocities (longitudinal, vl and shear, vS) were recorded at 5 MHz. Elastic moduli, Poisson’s ratio (σ) and microhardness (H) were then calculated to obtain quantitative analysis regarding the structure of these glasses. The results obtained showed that the doping of V2O5 with silica borotellurite enhances the strengthening of glass network. Glass with 0.03 molar fraction of V205 shows low ultrasonic velocities and low elastic moduli. The variation of elastic properties is related to the change of structure in the vanadium doped silica-borotellurite glass system.

Elastic properties of zinc-phosphate glasses doped with erbium trioxide

2010 ◽  
Vol 88 (7) ◽  
pp. 513-516 ◽  
Author(s):  
B. Eraiah ◽  
Ramakrishnaiah ◽  
R. V. Anavekar
Keyword(s):  
Elastic Moduli ◽  
Zinc Phosphate ◽  
Poisson Ratio ◽  
Phosphate Glasses ◽  
Superposition Method ◽  
Ultrasonic Velocities ◽  
Debye Temperatures ◽  
Ultrasonic Sound ◽  
Pulse Echo ◽  
Sound Velocities

New glasses of the system xEr2O3-(60-x)ZnO-40P2O5 (where x = 0.1 to 0.5 mol%) have been prepared by using a conventional meltquenching method. We have measured the densities of these glasses by using a displacement method, and corresponding molar volumes have also been calculated. We have measured both longitudinal and transverse ultrasonic sound velocities of these glasses using a pulse-echo superposition method. These ultrasonic velocities have been used to calculate the elastic moduli, Poisson ratio, and Debye temperatures. The variations of density, molar volume, ultrasonic sound velocities, elastic moduli, Poisson ratio, and Debye temperature have been discussed with respect to Er2O3 concentration.

Effect of Bi2O3 on Elastic Properties of Silica Bismuthate Glasses by Pulse-Echo Method

2012 ◽  
Vol 2 (5) ◽  
pp. 546-548
Author(s):  
P. Vasantharani P. Vasantharani ◽  
◽  
I.Sankeeda I.Sankeeda
Keyword(s):  
Elastic Properties ◽  
Pulse Echo ◽  
Pulse Echo Method

Оценка реальной чувствительности приемочного ультразвукового контроля рельсов

2020 ◽  
pp. 17-27
Author(s):  
А.А. Шелухин
Keyword(s):  
Ultrasonic Pulse ◽  
Piezoelectric Transducers ◽  
Acoustic Path ◽  
Metallic Inclusion ◽  
Inclusion Type ◽  
The Real ◽  
Rail Head ◽  
Pulse Echo

In this article, the analysis of the acoustic path during the ultrasonic pulse echo testing of the rail head in production is carried out. The influence of the parameters of the applied piezoelectric transducers on the distribution of sensitivity for the sounding scheme used in the existing installations is estimated and the real sensitivity of detecting defects of the «non-metallic inclusion» type is estimated.

scholarly journals X-ray Diffraction Analysis and Williamson-Hall Method in USDM Model for Estimating More Accurate Values of Stress-Strain of Unit Cell and Super Cells (2 × 2 × 2) of Hydroxyapatite, Confirmed by Ultrasonic Pulse-Echo Test

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2949
Author(s):  
Marzieh Rabiei ◽  
Arvydas Palevicius ◽  
Amir Dashti ◽  
Sohrab Nasiri ◽  
Ahmad Monshi ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Ultrasonic Pulse ◽  
High Accuracy ◽  
Unit Cell ◽  
Deformation Model ◽  
X Ray Diffraction ◽  
Uniform Deformation ◽  
X Ray ◽  
Pulse Echo

Taking into account X-ray diffraction, one of the well-known methods for calculating the stress-strain of crystals is Williamson-Hall (W–H). The W-H method has three models, namely (1) Uniform deformation model (UDM); (2) Uniform stress deformation model (USDM); and (3) Uniform deformation energy density model (UDEDM). The USDM and UDEDM models are directly related to the modulus of elasticity (E). Young’s modulus is a key parameter in engineering design and materials development. Young’s modulus is considered in USDM and UDEDM models, but in all previous studies, researchers used the average values of Young’s modulus or they calculated Young’s modulus only for a sharp peak of an XRD pattern or they extracted Young’s modulus from the literature. Therefore, these values are not representative of all peaks derived from X-ray diffraction; as a result, these values are not estimated with high accuracy. Nevertheless, in the current study, the W-H method is used considering the all diffracted planes of the unit cell and super cells (2 × 2 × 2) of Hydroxyapatite (HA), and a new method with the high accuracy of the W-H method in the USDM model is presented to calculate stress (σ) and strain (ε). The accounting for the planar density of atoms is the novelty of this work. Furthermore, the ultrasonic pulse-echo test is performed for the validation of the novelty assumptions.

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