Structure and properties of zinc bismuth phosphate glass

Im, Sang Hyeok; Na, Young Hoon; Kim, Nam Jin; Kim, Dong Hwan; Hwang, Cha Won; Ryu, Bong Ki

doi:10.1016/j.tsf.2010.03.128

Cited by 31 publications

(6 citation statements)

References 15 publications

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“…Irrespective of the composition, symmetric stretching vibrations of pyrophosphate (α‐Ca 2 P 2 O 7 , etc.) group distributions were observed in all glasses at 1133, 925, 790, and 720 cm −1 . A split in absorption band appeared at 575 and 720 cm −1 only in samples GZ0, GZ3, and GZ6.…”

Section: Resultsmentioning

confidence: 84%

Investigations on In Vitro and Degradation Properties of ZnO‐Added Phosphate‐Based Glasses and Glass Ceramics

Aravindan¹,

Rajkumar²,

Rajendran³

et al. 2012

J. Am. Ceram. Soc.

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A series of phosphate based glasses of composition 45P2O5–(40−x)CaO–15Na2O–xZnO (x = 0, 3, 6, 8 10, and 12 mol%) were prepared employing melt‐quenching techniques. Based on the thermal analysis data of glasses, the schedule of thermal treatments have been designed and employed to obtain their glass ceramic derivatives. The increase in thermal stability and decrease in crystallization tendency was observed from differential thermal analysis traces. The durability of phosphate glasses were improved as a result of the addition of ZnO content. The increasing ZnO content alters the phosphate glass structure and enhances the cross‐link formation between different network chains. A broad‐based characterization approach combining different techniques was used to investigate the in vitro properties of glasses and their glass‐ceramic equivalents against the addition of ZnO content into the glass composition. The in vitro results revealed the decreasing nature of apatite forming ability of phosphate glasses with increase in ZnO content before and after thermal treatments. Both the glass and glass‐ceramics containing ZnO content above 10 mol% exhibited poor in vitro performance mainly because of their dissolution nature. The weight loss analysis revealed that the decreasing solubility of glass and glass‐ceramics was observed as increasing of ZnO content.

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Section: Resultsmentioning

confidence: 84%

Investigations on In Vitro and Degradation Properties of ZnO‐Added Phosphate‐Based Glasses and Glass Ceramics

Aravindan¹,

Rajkumar²,

Rajendran³

et al. 2012

J. Am. Ceram. Soc.

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“…However, previous works [16] showed that for the Ag/P ratio considered here, aluminum was predominantly in octahedral coordination (Al (6)). For Bi 3+ , only the pyramidal (Bi(3)) and the octahedral (Bi (6)) coordinations are reported in literature [27][28]. Moreover, XANES data acquired for the AgI-AgPO3-5Bi2O3 glass show that bismuth coordination in this glass is octahedral ( Figure 11).…”

Section: Valence Units Theorymentioning

confidence: 96%

Niobium- and bismuth-silver phosphate glasses for the conditioning of radioactive iodine

Chabauty

Campayo

Méar

et al. 2019

Journal of Non-Crystalline Solids

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Iodine 129 is a radioactive waste coming from the nuclear industry. Due to its high volatility, it cannot be vitrified in conventional borosilicate glasses. As a part of the assessment of alternative solutions, this work focuses on the study of the feasibility of iodine conditioning using a glass matrix aiming at a long-term storage in a geological repository. Silver phosphate glasses, which can incorporate high amounts of iodine and can be synthesized at low temperature, were chosen for this study. In order to increase their chemical durability, theses glasses were crosslinked by niobium and bismuth oxides. Niobium and bismuth incorporation limits were determined for an iodine amount of 12 wt% and range from 1.6 mol% to 4.0 mol%, depending on the Ag2O/P2O5 ratio. The glasses polymerization state was investigated using 31 P MAS NMR, RAMAN spectroscopy and X-ray absorption spectroscopy. Iodine local environment was determined by EXAFS at iodine K-edge.Structural investigations show that the introduction of those crosslinking reagents induces a significant increase of the polymerization degree of the glasses. However, despite this higher connectivity, the two crosslinking reagents have a low impact on the glass transition temperature of iodine-containing silver phosphate glasses.

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“…Glass density is determined to get information about the structural compactness, interstitial spaces and coordination number. Table 2 enlists the density (ρ) and molar volume [14,15]. This higher density of glass indicates the enhancement of a degree of structural compactness [16].…”

Section: Density and Molar Volumementioning

confidence: 99%

Structural and physical properties of $$\hbox {Sm}^{3+}$$ Sm 3 + doped magnesium zinc sulfophosphate glass

2017

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Samarium (Sm 3+) doped magnesium zinc sulfophosphate glass system of composition (60-x)P 2 O 5-20MgO-20ZnSO 4-xSm 2 O 3 (x = 0.0, 0.5, 1.0, 1.5 and 2.0 mol%) were synthesized using melt-quenching technique. The structure and physical properties of prepared glass samples were characterized. The X-ray diffraction pattern verified their amorphous nature. The physical properties such as density, refractive index, molar volume, rare earth ion concentration, etc. were calculated. The decrease in the optical bandgap energy with increasing Sm 2 O 3 contents was attributed to the alteration in the glass network structures. Fourier transformed infrared spectra and Raman analyses manifested the depolymerization of ZnSO 4 in the phosphate host matrix. The present findings may be beneficial for the advancement of functional glasses.

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Structure and properties of zinc bismuth phosphate glass

Cited by 31 publications

References 15 publications

Investigations on In Vitro and Degradation Properties of ZnO‐Added Phosphate‐Based Glasses and Glass Ceramics

Investigations on In Vitro and Degradation Properties of ZnO‐Added Phosphate‐Based Glasses and Glass Ceramics

Niobium- and bismuth-silver phosphate glasses for the conditioning of radioactive iodine

Structural and physical properties of $$\hbox {Sm}^{3+}$$ Sm 3 + doped magnesium zinc sulfophosphate glass

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