Synthesis and characterization of barium fluoride substituted zinc tellurite glasses

Aishwarya, K.; Vinitha, G.; Varma, G. Sreevidya; Asokan, S.; Manikandan, N.

doi:10.1016/j.physb.2017.09.039

Cited by 26 publications

(6 citation statements)

References 31 publications

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“…Most reported works on this subject are devoted to high alkaline [ 38 , 39 ] and zinc fluoride [ 40 , 41 , 42 , 43 , 44 , 45 ] contents in transparent tellurite glasses without a loss of the glass forming ability. Only a few works reported on transparent tellurite glasses with high heavy metal fluoride contents such as BaF 2 and PbF 2 up to 30 mol% [ 46 , 47 , 48 , 49 , 50 ]. A single report describes tellurite glasses with up to 50 mol% of PbF 2 , even if the glassy state of the resulting samples obtained by melt-quenching is not demonstrated [ 51 ].…”

Section: Introductionmentioning

confidence: 99%

Transparent Glasses and Glass-Ceramics in the Ternary System TeO2-Nb2O5-PbF2

et al. 2021

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Transparent fluorotellurite glasses were prepared by melt-quenching in the ternary system TeO2-Nb2O5-PbF2. The synthesis conditions were adjusted to minimize fluorine loss monitored as HF release. It was found that 10 mol% of Nb2O5 is the optimum content for PbF2 incorporation up to 35 mol% in the tellurite matrix without loss of glass forming ability. Such glass compositions exhibit a wide optical window from 380 nm to about 6 μm. Crystallization properties were carefully investigated by thermal analysis and compositions with higher PbF2 contents exhibit preferential precipitation of lead oxyfluoride Pb2OF2 at lower temperatures. The lead oxyfluoride crystallization mechanism is also governed by a volume nucleation, barely reported in tellurite glasses. Eu3+ doping of these glass compositions also promotes a more efficient nucleation step under suitable heat-treatments, resulting in transparent Eu3+-doped glass-ceramics whereas undoped glass-ceramics are translucent. Finally, Eu3+ spectroscopy pointed out a progressive, more symmetric surrounding around the rare earth ions with increasing PbF2 contents as well as higher quantum efficiencies. These new fluorotellurite glass compositions are promising as luminescent hosts working in the middle infrared.

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Section: Introductionmentioning

confidence: 99%

Transparent Glasses and Glass-Ceramics in the Ternary System TeO2-Nb2O5-PbF2

et al. 2021

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“…20 Barium fluoride was less toxic than barium oxide and can provide a larger radius of barium ions (.135 nm) to improve the radiation-proof performance of glass. 21 This paper studied the radiation shielding capability of lead-free tellurite glass by replacing ZnO with BaF 2 . Lead-free tellurite glass was prepared using the hightemperature melting method.…”

Section: Introductionmentioning

confidence: 99%

“…The incorporation of zinc oxide into glass contributes to enhanced structural integrity and thermal stability 20 . Barium fluoride was less toxic than barium oxide and can provide a larger radius of barium ions (.135 nm) to improve the radiation‐proof performance of glass 21 …”

Section: Introductionmentioning

confidence: 99%

Nuclear radiation shielding performance of the new lead‐free TeO₂–Bi₂O₃–ZnO–BaF₂ glass

Yin,

Zhang,

Xiang

et al. 2024

Int J Applied Ceramic Tech

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This paper studied the radiation shielding properties of new lead‐free telluride glass with different BaF2 content. The 65TeO2–15Bi2O3–(20 − x)ZnO–xBaF2 glass systems (where x = 1, 3, 5, 7, 9 mol%) were tested through the X‐ray diffraction, ultraviolet–visible spectrophotometer, and differential scanning calorimetry. The glass system exhibited good thermal stability and a uniform surface without surface crystallization. The linear attenuation coefficient of the TBZBF series glass was tested using five different gamma radiation sources (241Am, 133Ba, 57Co, 137Cs, and 60Co). They were calculated to the mass attenuation coefficient, half‐value layer, mean free path, and effective atomic number through numerical simulations with XCOM software. The maximum mass attenuation coefficient for TBZBF‐9 was calculated to be 5.3577 cm2/g. Comparisons were made between this glass system and other tellurite and leaded glasses reported in the literature. The glass system exhibited superior radiation shielding capability compared to leaded tellurite glass under the same testing conditions. The gamma radiation shielding capacity increased with BaF2 content in the glass system. These results show that TBZBF‐9 exhibited the best gamma radiation shielding effectiveness while maintaining glass transparency.

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“…Addition of fluorine dopants in the tellurite matrix to form fluorotellurite helps in overcoming the inherent problem of mid-IR absorption due to hydroxyl molecules in these samples. These metal fluoride dopants have also been found to improve transparency and refractive index [15][16][17][18][19]. Though chalcogenides have been studied extensively for their non-linear optical properties, reports on tellurites in this aspect are quite few.…”

Section: Introductionmentioning

confidence: 99%

Effect of dopants on the nonlinear optical properties of fluorotellurite glasses for optical limiting application

Vani¹,

Vinitha²,

Manikandan³

2021

Phys. Scr.

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Investigation on non-linear optical property of zinc and barium based fluorotellurite glasses based on open aperture Z-scan technique and its application as an optical limiter is reported. Changes in various parameters like polarizability, refractive index and molar refractivity have been attributed to the presence of barium/ zinc atoms and their impact on modifying the structure. Formation of nonbridging sites owing to fluorine doping have been explored based on Raman measurements. Open aperture data shows reverse saturable absorption behaviour and is attributed to the two-photon absorption process. Non-linear absorption values are found to increase with doping of both barium fluoride and zinc fluoride which has been attributed to the formation of non-bridging fluorine sites alongwith the polarizability of barium atoms. Effect of non-bridging fluorine sites on modifying the optical properties have been justified based on the energy bandgap values. Samples show comparably good optical limiting thresholds with a value of 2.59×10 12 W m −2 for the sample with highest fluorine concentration, which enables them to be used as limiting devices.

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Synthesis and characterization of barium fluoride substituted zinc tellurite glasses

Cited by 26 publications

References 31 publications

Transparent Glasses and Glass-Ceramics in the Ternary System TeO2-Nb2O5-PbF2

Transparent Glasses and Glass-Ceramics in the Ternary System TeO2-Nb2O5-PbF2

Nuclear radiation shielding performance of the new lead‐free TeO₂–Bi₂O₃–ZnO–BaF₂ glass

Effect of dopants on the nonlinear optical properties of fluorotellurite glasses for optical limiting application

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Synthesis and characterization of barium fluoride substituted zinc tellurite glasses

Cited by 26 publications

References 31 publications

Transparent Glasses and Glass-Ceramics in the Ternary System TeO2-Nb2O5-PbF2

Transparent Glasses and Glass-Ceramics in the Ternary System TeO2-Nb2O5-PbF2

Nuclear radiation shielding performance of the new lead‐free TeO2–Bi2O3–ZnO–BaF2 glass

Effect of dopants on the nonlinear optical properties of fluorotellurite glasses for optical limiting application

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Nuclear radiation shielding performance of the new lead‐free TeO₂–Bi₂O₃–ZnO–BaF₂ glass