Cerium doped barium tantalates: Fabrication, characterization, and investigation of gamma radiation attenuation

Jia, Xiabing; Zhou, Yanyan; Zheng, Jian; Li, Yintao; Zou, Hao; Xie, Ruishi

doi:10.1016/j.jallcom.2016.07.188

Cited by 19 publications

(11 citation statements)

References 23 publications

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“…Both Z eff and N eff of composite are essential parameters, which give prior knowledge on how radiations interact with matter. N eff was calculated using Equation (9),…”

Section: γ-Ray Attenuation Parametersmentioning

confidence: 99%

“…The relative differences (%) noticed may be attributed to the absorption edge effects of high Z element which are not assimilated into the database of Auto-Zeff. [48] The experimental and WinXCom values of N eff at 59.54 and 662 keV energies were calculated using Equation (9) and are presented in Table 7. N eff values have the same qualitative energy dependence as Z eff values.…”

Section: γ-Ray Attenuation Parametersmentioning

confidence: 99%

“…As polymers seem to be promising candidates for such applications, there have been several efforts in synthesizing polymer composites filled with medium and high Z elements as radiation shields. The polymers like vinyl polymers, [8] ethylene-propylenediene-monomer rubber, [9] bisphenol-A diglycidyl ether polymer, epoxy resin, [10][11][12][13] isophthalic resin, [14,15] silicone rubber, [16] polyvinyl alcohol, [17,18] polyimide matrix, [19] hydroxyapatite [20] have been explored as shields by filling suitable Z element. Owing to the excellent mechanical properties, superior solvent and chemical resistance, good dimensional stability, and adhesive strength of epoxy resin, epoxy matrix composites loaded with high-Z fillers have become attractive candidates for radiation shielding.…”

Section: Introductionmentioning

confidence: 99%

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Attenuation properties of epoxy‐Ta₂O₅ and epoxy‐Ta₂O₅‐Bi₂O₃ composites at γ‐ray energies 59.54 and 662 keV

Muthamma

Bubbly

Gudennavar

2020

J of Applied Polymer Sci

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Epoxy resin filled with suitable high Z elements can be a potential shield for X‐rays and γ‐rays. In this work, we present the γ‐ray attenuation properties of epoxy composites filled with (0–30 wt%) Tantalum pentoxide (Ta2O5) and Ta2O5‐Bi2O3, which were prepared by open mold cast technique. X‐ray diffraction patterns showed crystalline peaks of Ta2O5 and bismuth oxide (Bi2O3) in the prepared epoxy‐Ta2O5 and epoxy‐Ta2O5‐Bi2O3 composites. Homogeneity of the samples at higher filler wt% was revealed by SEM images. Mechanical characterization showed the enhanced mechanical strength of epoxy‐Ta2O5‐Bi2O3 composites compared to epoxy‐Ta2O5. Higher storage modulus and glass transition temperature of the epoxy‐Ta2O5‐Bi2O3 composites showed enhanced stiffness and thermal stability when compared to neat and epoxy‐Ta2O5. Decrease in the value of tan(δ) at higher content of filler loadings indicated the good adhesion between filler and matrix. Mass attenuation coefficients of epoxy‐Ta2O5 (30 wt%) composites at γ‐ray energies 59.54 and 662 keV were found to be 0.876 cm2 g–1 and 0.084 cm2 g–1, while that of epoxy‐Ta2O5‐Bi2O3 (30 wt% Bi2O3) composite were 1.271 cm2 g–1 and 0.088 cm2 g–1, respectively. The epoxy‐5% Ta2O5‐30% Bi2O3 composites with higher μ/ρ value and tensile strength may be a potential γ‐ray shield in various radiation environments.

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“…Both Z eff and N eff of composite are essential parameters, which give prior knowledge on how radiations interact with matter. N eff was calculated using Equation (9),…”

Section: γ-Ray Attenuation Parametersmentioning

confidence: 99%

Section: γ-Ray Attenuation Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Attenuation properties of epoxy‐Ta₂O₅ and epoxy‐Ta₂O₅‐Bi₂O₃ composites at γ‐ray energies 59.54 and 662 keV

Muthamma

Bubbly

Gudennavar

2020

J of Applied Polymer Sci

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“…The inset is the magnied XPS spectrum to show the existence of Er 4d and Yb 4d. For the F À -free EYBLO sample, the high-resolution XPS spectrum of Ba 3d spectrum exhibits two peaks, 3d 5/2 and 3d 3/2 (from the spin-orbit splitting), 33 are used as a probe to nd out the evident of the substitution of …”

Section: Structure and Morphologymentioning

confidence: 99%

Upconversion luminescence enhancement and temperature sensing behavior of F⁻ co-doped Ba₃Lu₄O₉:Er³⁺/Yb³⁺ phosphors

Liu

Zhou

et al. 2017

RSC Adv.

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A series of Ba 3 Lu 4 O 9 :Er 3+ /Yb 3+ (EYBLO) phosphors co-doped with F À ions were synthesized by a simple solid-state reaction method. The results showed that the primary rhombohedral structure was maintained and the crystal lattice began to shrink when F À ions were introduced into the host matrix to occupy the O 2À site. The agglomerations and the impurities (OH À and CO 2 ) with higher phonon energy on the sample surface could be minimized and the sample crystallinity could be improved. Under 980 nm laser diode excitation, the green and red UC emissions of the EYBLO:0.4F À sample show nearly 5-and 7.5-fold enhancements in contrast to F À -free EYBLO. The upconversion luminescence can be finely tuned from yellow to red light to some extent by increasing F À concentration. Based on pumppower dependence and decay lifetime analysis, the energy level diagram was illustrated and the upconversion energy-transfer mechanism was discussed. The green and red emission enhancements are attributed to the modification of the local crystal field of Er 3+ ions and reduction of crystal site symmetry.The cross-relaxation and back-energy-transfer processes play an important role to enhance the red/ green UC emission intensity ratios. The fluorescence intensity ratio technique was employed to investigate the temperature sensing behavior of the synthesized phosphors. The temperature sensing properties can be enhanced by doping of F À ions, and the maximum sensitivity is found to be 44.57 Â 10 À4 K À1 at 523 K. It is promising to provide an alternative approach for enhancing UC luminescence and the temperature sensitivity in oxide matrixes and then obtain high-quality optical temperature-sensing materials by simply co-doping F À ions.

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“…Cerium exhibits remarkable properties such as polyvalent states of Ce 4+ + e − → Ce 3+ , electronic transitions between interbond (4f↔5d), and high strength optical absorption in the UV region. [ 6–11 ]…”

Section: Introductionmentioning

confidence: 99%

Thermal, structural, optical, and photon shielding studies of cerium‐doped barium tellurite glasses

Grover¹,

Kaur

Pandey³

2023

Luminescence

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A series of tellurite‐based glasses are prepared by using a melt‐quenching method. The effect of cerium on the physical, thermal, structural, optical, spectroscopic, and shielding properties of barium tellurite glass samples is studied. It has been observed that the thermal stability factor increases with increasing cerium ion (Ce3+) concentration. The density and other physical parameters such as ion concentration and molar volume are calculated using the Archimedes principle. An increase in optical band gap and density suggests a decrement in non‐bridging oxygens. These results are in accordance with Raman results. The blue emission in prepared glasses is studied in terms of International Commission on Illumination chromaticity coordinates. Moreover, various shielding properties such as mass attenuation coefficient, linear attenuation coefficient, effective atomic number, half‐value layer, and tenth‐value layer have also been determined to understand the photon shielding characteristics of as‐prepared glass samples.

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Cerium doped barium tantalates: Fabrication, characterization, and investigation of gamma radiation attenuation

Cited by 19 publications

References 23 publications

Attenuation properties of epoxy‐Ta₂O₅ and epoxy‐Ta₂O₅‐Bi₂O₃ composites at γ‐ray energies 59.54 and 662 keV

Attenuation properties of epoxy‐Ta₂O₅ and epoxy‐Ta₂O₅‐Bi₂O₃ composites at γ‐ray energies 59.54 and 662 keV

Upconversion luminescence enhancement and temperature sensing behavior of F⁻ co-doped Ba₃Lu₄O₉:Er³⁺/Yb³⁺ phosphors

Thermal, structural, optical, and photon shielding studies of cerium‐doped barium tellurite glasses

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Cerium doped barium tantalates: Fabrication, characterization, and investigation of gamma radiation attenuation

Cited by 19 publications

References 23 publications

Attenuation properties of epoxy‐Ta2O5 and epoxy‐Ta2O5‐Bi2O3 composites at γ‐ray energies 59.54 and 662 keV

Attenuation properties of epoxy‐Ta2O5 and epoxy‐Ta2O5‐Bi2O3 composites at γ‐ray energies 59.54 and 662 keV

Upconversion luminescence enhancement and temperature sensing behavior of F− co-doped Ba3Lu4O9:Er3+/Yb3+ phosphors

Thermal, structural, optical, and photon shielding studies of cerium‐doped barium tellurite glasses

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Attenuation properties of epoxy‐Ta₂O₅ and epoxy‐Ta₂O₅‐Bi₂O₃ composites at γ‐ray energies 59.54 and 662 keV

Attenuation properties of epoxy‐Ta₂O₅ and epoxy‐Ta₂O₅‐Bi₂O₃ composites at γ‐ray energies 59.54 and 662 keV

Upconversion luminescence enhancement and temperature sensing behavior of F⁻ co-doped Ba₃Lu₄O₉:Er³⁺/Yb³⁺ phosphors