Effect of TeO2 on the elastic moduli of sodium borate glasses

Saddeek, Yasser B.; Latif, Lamia.Abd El

doi:10.1016/j.physb.2004.02.001

Cited by 145 publications

(46 citation statements)

References 33 publications

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“…The decreasing trend in the packing density with TeO 2 content can seen in Fig. 5 [17]. Table 5 shows the increase of dissociation energy with TeO 2 content.…”

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confidence: 82%

“…Table 1: Density ( ρ ), longitudinal ultrasonic velocity (VL) and shear ultrasonic velocity (VS), elastic moduli of (TeO2)x (B2O3)1-x glasses Table 3: Bond length (r), first order stretching force constant (F), coordination number (n) of the oxides TeO2 and B2O3 [11,17] Oxide r(nm) F(Nm Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…Quantitatively analysis of experimentally determined elastic moduli based on bond compression model [7] and Makishima-Mackenzie model [8,9] . The values of the constants used in this calculation are listed in Table 3 [12,17] .The calculated value of number of bonds per unit volume n b , bond compression bulk modulus K bc , the ratio K bc /K e , the atomic ring size l, the average stretching force constant F and average cross link density n c are given in Table 4. From the Table 4 it can be seen that the value of K bc decrease from 9.82 GPa to 82 GPa with increasing TeO 2 content.…”

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confidence: 99%

“…6. K bc is always greater than the experimental value, typically by a factor of 3-10 [1] and the value of K m is lower than the experimental value K e is due to the decreasing packing density and the increasing molar volume [17] . The results show a fairly good agreement between the experimental and the calculated values of Poisson's ratio.…”

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confidence: 99%

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Ultrasonic Study and Physical Properties of Borotellurite Glasses

Halimah¹,

Sidek²,

Daud³

et al. 2005

American J. of Applied Sciences

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A series of glasses (TeO 2 ) x (B 2 O 3 ) 1-x with x = 0. 6, 0.63, 0.65, 0.70, 0.73, 0.75, 0.78 and 0.80 were synthesized by rapid quenching. Longitudinal and shear ultrasonic velocity were measured at room temperature and at 5 MHz frequency. Elastic properties, Poisson's ratio and micro hardness have been calculated from the measured density and ultrasonic velocity at room temperature. Estimated parameters based on Makishima-Mackenzie theory and bond compression model were calculated in order to analyze the experimental elastic moduli. Comparison between the experimental elastic moduli data obtained in the study and the calculated theoretically by other models has been discussed.

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“…The decreasing trend in the packing density with TeO 2 content can seen in Fig. 5 [17]. Table 5 shows the increase of dissociation energy with TeO 2 content.…”

Section: -------------------------------------------0----------------mentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: -------------------------------------------0----------------mentioning

confidence: 99%

Section: -------------------------------------------0----------------mentioning

confidence: 99%

See 2 more Smart Citations

Ultrasonic Study and Physical Properties of Borotellurite Glasses

Halimah¹,

Sidek²,

Daud³

et al. 2005

American J. of Applied Sciences

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“…This type of borate glasses draws great attention due to their enhanced electrical and optical properties when modified by phthalocyanine or by rare earths. 2 The study of optical absorption and fluorescence of rare earth doped glasses is an attractive area of research both from the fundamental and technological viewpoints. It is well known that rare earth doped glasses find a variety of such applications as to optical amplifiers, lasers and other electrooptic devices.…”

Section: Structure Of Glassmentioning

confidence: 99%

Synthesis and Characterization of Nd³⁺‐Doped Indium‐sodium Tetraborate Glasses

2009

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Glasses in the system xNd 2 O 3 •(10-x)In 2 O 3 •90Na 2 B 4 O 7 (with x＝0, 1, 3, 5 mol%) were fabricated via a melt quenching technique. The amorphous nature of the quenched glasses was confirmed by X-ray powder diffraction studies. The infrared spectra of the glasses show no boroxol ring formation in the structure of these glasses. Optical absorption of glasses shows that the transition 4 I 9/2 → 4 G 5/2 ＋ 2 G 7/2 is more intense than the other transitions, which shifts from 580 nm (for the free Nd 3＋ ion ) to 584 nm. The peak in fluorescence spectra for x＝5 mol% Nd 3＋ in the region 800-900 nm under excitation wavelength 584 nm was attributed to 4 F 3/2 → 4 I 9/2 transition. Differential thermal analysis for (x＝5 mol% Nd 3＋ ) shows glass transition (ca. 600 ℃) and crystallization temperatures (ca.1155, 975 ℃). The scanning electron microscopy studies indicate the amorphous state of glass sample.

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Synthesis, structural, and optical behavior of erbium‐doped silicophosphate glasses for photonics applications

Bouabdalli,

El Jouad,

Touhtouh

et al. 2024

Luminescence

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Erbium‐incorporated silicophosphate glasses are very desirable in principal sectors such as photonics, optoelectronics, lasers, and illuminating diodes. The focus of the current investigation has been on determining how the erbium dopant affects the optical, physical, and structural characteristics of the silicophosphate‐based glasses. The pure silicophosphate glasses and doped with various contents of erbium were prepared by the sol–gel process in this work. The noncrystalline character of the glasses synthesized was confirmed by the XRD patterns that were obtained. The optical measurement showed that the addition of trivalent erbium ions resulted in an increase in the refractive index of the samples and a decrease in their energy band gap values. It demonstrated the presence of P–O–P linkage stretching vibration modes that were both symmetrical and asymmetrical, P–O in PO4 bending vibration modes, OH group elongating and flexure vibrations, and P–O–H water absorption in glasses. The theoretical values of the optical basicity (Ʌth) increased from 0.465 to 0.472, while the values of the interaction parameter (A) decreased from 0.218 to 0.214 . Silicophosphate glasses doped with trivalent erbium ions show promise as optoelectronic and optical filter system materials.

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Effect of TeO2 on the elastic moduli of sodium borate glasses

Cited by 145 publications

References 33 publications

Ultrasonic Study and Physical Properties of Borotellurite Glasses

Ultrasonic Study and Physical Properties of Borotellurite Glasses

Synthesis and Characterization of Nd³⁺‐Doped Indium‐sodium Tetraborate Glasses

Synthesis, structural, and optical behavior of erbium‐doped silicophosphate glasses for photonics applications

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Effect of TeO2 on the elastic moduli of sodium borate glasses

Cited by 145 publications

References 33 publications

Ultrasonic Study and Physical Properties of Borotellurite Glasses

Ultrasonic Study and Physical Properties of Borotellurite Glasses

Synthesis and Characterization of Nd3+‐Doped Indium‐sodium Tetraborate Glasses

Synthesis, structural, and optical behavior of erbium‐doped silicophosphate glasses for photonics applications

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Synthesis and Characterization of Nd³⁺‐Doped Indium‐sodium Tetraborate Glasses