Gamma irradiation effects on the structural, thermal and optical properties of samarium doped lanthanum–lead- boro-tellurite glasses

Madhu, A.; Eraiah, B.; Srinatha, N.

doi:10.1016/j.jlumin.2020.117080

Cited by 38 publications

(15 citation statements)

References 44 publications

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“…Glasses containing metal oxide such as bismuth and Zinc got the eye of the researcher owing to its wide-range of uses in the field of glass-ceramics such as in thermal sensors, mechanical sensors, reflecting windows, optic apparatuses etc. They possess a cut-off infrared (IR) wavelength of larger range, and non-linear optic-susceptibility of third-order and these properties are ideal to use it as an IR transmission devices, ultrafast optical switches, and opto-photonic devices [1][2][3][4][5][6][7][8]. Doweidar et al [9] prepared Zinc Bismuth Borate glasses and investigated mechanical properties and Debye temperature by measuring the sound velocities (VL and Vs).…”

Section: Introductionmentioning

confidence: 99%

Density of Bismuth Boro Zinc Glasses Using Machine Learning Techniques

Ahmed

Rajiya

Samee

et al. 2022

J Inorg Organomet Polym

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Machine learning techniques have been employed to predict the glass densities of xBi 2 O 3 –(70 − x)B 2 O 3 –20Li 2 O–5Sb 2 O 3 –5ZnO glasses using a data set of 2000 various B 2 O 3 rich glasses using their chemical composition and ionic radius. The experimental density of present glasses strongly depends on Bi 2 O 3 content which is increasing with bismuth content. The increasing density in bismuth doped glasses because the BO 3 are converted into BO 4 units, and besides BO 3 units are less heavy than the BO 4 units. The FTIR studies also confirm that the intensity of B–O–B bond decreasing with increasing Bi 2 O 3 content which suggested that B–O–B bond in bond ring isolated to BO 3 units transformed into BO 4 units. In Raman Spectra the stretching vibrations of BO 4 units shifting towards higher wavelengths with increasing Bi 2 O 3 content. This shifting conforms that there is a structural changes in the glass-matrix and borate units converting from BO 3 to BO 4 units. The prepared glasses along with B 2 O 3 rich glass data set train on various AI model such as gradient descent, Random Forest regression and Neural Networks to predict present density of glasses. Among the various models RF regression analysis model is successfully acceptable for the glass data with the highest R 2 value 0.983 which end result conform that the predicted and experimental values correlated. ANNs stood the effective technique in prediction of glass density with the optimum performance resulting with Tanh as the activation function (R 2 = 0.950). The minimum cost 0.018 obtained in the case of gradient decent function which also shows the better performance of regression model.

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Section: Introductionmentioning

confidence: 99%

Density of Bismuth Boro Zinc Glasses Using Machine Learning Techniques

Ahmed

Rajiya

Samee

et al. 2022

J Inorg Organomet Polym

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“…Gamma irradiation can also leads to an increase in the number of free electrons and holes in the glass network, resulting in an increase in the AC conductivity. The extent of these changes will depend on the dose of gamma rays and the specific composition of the glasses (25) .…”

Section: Gamma Ray Irradiation Effectsmentioning

confidence: 99%

Effect of Gamma Irradiation on Dielectric and AC Conductivity Studies of Bismuth Borate Glasses Doped with V2O5

Devidas¹,

Dinkar²,

Biradar³

2023

IJST

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Objectives: To study gamma ray irradiation effect on dielectric and AC conductivity of V 2 O 5 doped bismuth borate glasses designed with the compositions 50B 2 O 3 -(50-X)Bi 2 O 3 -XV 2 O 5 where, X = 0, 0.2, 0.4, 0.6, 0.8, 1.0 and establishing the conduction mechanism. Methods: Glasses were synthesized by traditional melt quenching technique at 1323K. The prepared samples were subjected to annealing at 623K, which helps to remove strain in the samples. Absence of crystalline phases in the samples was confirmed by X-ray diffraction studies. An independent measurement of dielectric constant, dielectric loss and AC conductivity was carried out for temperature range from 300Kto 493K by impedance analyzer. Findings: The physical properties of glass were achieved by studying the density and the molar volume. Dielectric constant (ε') and dielectric loss (ε") were measured as a function of temperatures in the range from 300K to 493K, over the frequencies 10 2 Hz -10 6 Hz before and after gamma ray irradiation. AC conductivity (σ AC ) of the glasses was measured as a function of frequency for different temperatures before and after gamma ray irradiation. Novelty: For the first time, it was attempted that the effect of gamma ray irradiation on dielectric and AC conductivity properties of bismuth-borate glasses doped with vanadium oxide has been investigated. Here we have observed the change in the variation of dielectric constant, dielectric loss and AC conductivity with frequency and temperature before and after gamma ray irradiation. The borate network becomes more compact after being exposed to gamma rays, and the energy band gap may even narrow. Furthermore, it has been found that the composition of the glass influences how radiation impacts conductivity.

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“…The Er/Yb-doped lead phosphate glass samples showed no crystalline peaks after being irradiated with gamma radiation. As a result of the wide hump and the absence of crystalline peaks, the Er/Yb-doped lead phosphate samples have an amorphous characteristic both before and after gamma irradiation [42,43,56].…”

Section: X-ray Diffraction (Xrd) Studiesmentioning

confidence: 99%

Enhanced linear and nonlinear optical properties of erbium/ytterbium lead phosphate glass by gamma irradiation for optoelectronics applications

et al. 2022

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Herein, this study intends to reveal the impact of gamma irradiation on the structural, linear, and nonlinear optical characteristics of 47P2O5−23Na2O−6Al2O3−22PbO−0.5Er2O3−1.5Yb2O3 glass. The Er/Yb-doped lead phosphate glass samples were produced using the traditional melt quenching procedure and then treated to different doses of gamma irradiation (0, 20, 50, and 100) kGy. The amorphous phase structure of the Er/Yb-doped lead phosphate glass samples was verified through XRD patterns. Also, the shift of the FTIR peaks due to the change in bond angles, and the change in the bond length of the P–O–P bridges means the glass network stability against radiation. With increasing irradiation dosages, the energy gap dropped from 4.11 eV to 3.42 eV and then enhanced to 3.48 at 100 kGy. At the same time, the Urbach energy enhanced from 10.23 eV to 37.03 eV. The oscillator energy Eo was found between 1.55 and 1.62 eV. Also, the dispersion energy Ed varied between 2.11 eV at 100 kGy and 2.71 eV at the dose of 50 kGy. The percentage of free carrier ions to effective mass (N/m*) is in the range (4.82–8.66) × 1047 cm3/g. Besides, the lattice dielectric constant ($${\varepsilon }_{l}$$ ε l ) increased from 5.54 to 6.63 as the gamma dosages increased. Furthermore, increasing gamma doses up to 50 kGy promotes susceptibility, which subsequently declines at 100 kGy, suggesting that increasing gamma doses over 50 kGy weakens polarizability potential. While the increasing gamma doses up to 50 kGy reduces the nonlinear refractive index and then improves at 100 kGy. Overall, the nonlinear and linear research revealed that Er/Yb lead phosphate glass is being used as a promising material for gain media and optical amplifiers.

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Gamma irradiation effects on the structural, thermal and optical properties of samarium doped lanthanum–lead- boro-tellurite glasses

Cited by 38 publications

References 44 publications

Density of Bismuth Boro Zinc Glasses Using Machine Learning Techniques

Density of Bismuth Boro Zinc Glasses Using Machine Learning Techniques

Effect of Gamma Irradiation on Dielectric and AC Conductivity Studies of Bismuth Borate Glasses Doped with V2O5

Enhanced linear and nonlinear optical properties of erbium/ytterbium lead phosphate glass by gamma irradiation for optoelectronics applications

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