Influence of ionic radius modifying oxides on the elastic properties of glasses using ultrasonic techniques and FTIR spectroscopy

Chinnamat, W.; Laopaiboon, R.; Laopaiboon, J.; Pencharee, Somkid; Bootjomchai, C.

doi:10.13036/17533562.58.5.101

Cited by 8 publications

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“…where v is the longitudinal (V L ) or shear (V s ) velocity, t is time of travel of the ultrasonic wave to and fro inside the glass sample and x is the sample thickness and v m is the mean ultrasonic velocity [29]. The longitudinal, shear and the mean ultrasonic velocities for the studied glasses increased from 3722.15 to 4087.26 m/s, 2214.38 to 2345.19 m/s and 2994.21 to 3190.21 m/s respectively as Er 2 O 3 NPs concentration was increased 1-5% molar composition.…”

Section: Resultsmentioning

confidence: 99%

“…8. By definition, micro-hardness refers to material's resistance to penetration or indentation [29]. The increase observed in the micro-hardness value is an indication of an increased rigidity and network connectivity in the glasses and the decrease indicates the opposite [17].…”

Section: Resultsmentioning

confidence: 99%

“…The fractal bond connectivity value changed from 2.6808 to 2.7880 and then to 2.3472 as the Nano Er 2 O 3 concentrations increased from 1 to 5% in the glass network. This is an indication of the structural change from tetrahedral structure (3D) to a 2D layer or structure [29].…”

Section: Resultsmentioning

confidence: 99%

“…This parameter also related to the Poisson ratio and is a factor of material permeability in the glass network [45]. The calculations of the latent heat of melting (ΔH m ) and the diffusion constant (D i ) were carried out using the expressions as reported by Chinnamat et al [29], as presented in Eqs. (16) and (17) as follows;…”

Section: Resultsmentioning

confidence: 99%

“…The diffusion constant value for the studied glasses increased from 3.3412 × 10 −9 to 3.9482 × 10 −9 m −2 s −1 when the concentration of Er 2 O 3 NPs was increased from 1 to 5 mol%. The increase in the value might be connected to increase in the ionic bond length resulting from the substitution of other oxides with shorter bond length with longer bonds of Er 2 O 3 NPs, making the overall bond length of the glasses longer [29].…”

Section: Resultsmentioning

confidence: 99%

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Structural, elastic and thermo-physical properties of Er2O3 nanoparticles doped bio-silicate borotellurite glasses

et al. 2020

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This paper presents a study on the structural, morphological and elastic properties of erbium oxide nanoparticles doped bio-silicate borotellurite glass system fabricated using the technique of melt-quenching with chemical compositional formula {[(TeO 2 ) 0.7 (B 2 O 3 ) 0.3 ] 0.8 (SiO 2 ) 0.2 } 1−y (Er 2 O 3 NPs) y where 0.01 ≤ y ≤ 0.05. The objective of the work was to study the some elastic and thermal parameters associated with non-destructive ultrasonic technique, with the aim of utilizing the glasses for erbium doped fiber amplifier application. Various measurements and Characterizations techniques which includes density and molar volume measurements, energy dispersive X-ray fluorescence, X-ray diffraction (XRD), Fourier transform infrared (FTIR), Transmission electron microscopy and Pulse-echo technique were carried out in this study. The density values for the glasses increased from 4.1900 to 4.6003 gcm −3 with the addition of 1-5% of Er 2 O 3 NPs in the glass structure. The increase can be ascribed to increase in the overall molar weight of the glass due to incorporation of heavy Er 3+ ions. The XRD patterns revealed no presence of sharp peaks with the observed broad hump around 2θ = 20-30° indicating the glassy and amorphous nature of the studied glasses. The FTIR spectra showed absorption with peaks around 1362-1385 cm −1 , 1221-1250 cm −1 , 655-689 cm −1 and 602-630 cm −1 wave number ranges, indicating the presences of H 3 BO 3 , SiO 4 , BO 3 , TeO 3 and TeO 4 structural units in the glass system. The microstructural nature observed in the glass morphology showed nanoparticle agglomerations in the glasses. The ultrasonic velocities, elastic moduli, microhardness, Poisson ratio, softening and Debye's temperatures, thermal expansion coefficient as well as other important parameters were calculated from the density and ultrasonic data. The values of the ultrasonic velocities, elastic moduli, Debye's temperature, softening temperature, thermal expansion coefficient and the acoustic impedance increased with increase in the Er 2 O 3 NPs concentration.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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