Structure of zinc phosphate glasses probed by neutron and X-ray diffraction of high resolving power and by reverse Monte Carlo simulations

Hoppe, Uwe; Walter, G.; Carl, G.; Neuefeind, J.; Hannon, Alex C.

doi:10.1016/j.jnoncrysol.2005.01.013

Cited by 37 publications

(53 citation statements)

References 46 publications

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“…15) In contrast, TiP 2 O 7 is known to be a representative stoichiometric compound. Its structure is based on PO 4 tetrahedra in which three 6-coordinated Ti atoms and one P atom bind to four oxygens and a Q 1 unit is formed.…”

Section: Discussionmentioning

confidence: 99%

“…15) In the case of the zinc titanophsophate glasses, the POTi bonds were formed by the addition of the TiO 2 and the coordination number of Ti was 5 or 6. Then, it is difficult to form the POTi linkages composed of Ti with high coordination number in the zincphosphate glass network, resulting in that the glass was separated to TiO 2 -rich glass and ZnO-rich glass when the ZnO added more than 1.4 of (ZnO)/(P 2 O 5 ) molar ratio.…”

Section: Discussionmentioning

confidence: 99%

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Properties and structures of TiO2-ZnO-P2O5 glasses

Segawa

Akagi

Yano

et al. 2010

J. Ceram. Soc. Japan

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The glass forming region of TiO 2 ZnOP 2 O 5 glasses was investigated at 1400°C, which is lower than the melting temperature of general titanophosphete glasses. TiO 2 could be added up to 15 mol% in the TiO 2 ZnOP 2 O 5 glasses. The glass forming region of 15TiO 2 ZnOP 2 O 5 was quite smaller than that of ZnOP 2 O 5 , and the glasses with TiO 2 were colorized by the formation of Ti 3+ . The refractive index of the glasses increased with increases in the TiO 2 concentrations, and the maximum was 1.656. The glass transition temperature, T g , of the glasses increased with increased TiO 2 concentrations, although T g decreased with increases in the ratio of ZnO to P 2 O 5 . Raman spectra of the glasses suggested that POTi bonds were formed by the addition of TiO 2 . The increase in T g and the narrow glass forming region were caused by the formation of strong chemical bonds, POTi.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Properties and structures of TiO2-ZnO-P2O5 glasses

Segawa

Akagi

Yano

et al. 2010

J. Ceram. Soc. Japan

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“…Small Me-O coordination numbers, i.e., 4 for Zn and a mixture of 4-, 5-and 6-coordinated Mg sites, were determined [6,24]. But it was found that the Me-O coordination sphere does not significantly change across the entire polyphosphate concentration range.…”

Section: Small-scale Heterogeneities In Magnesium and Zinc Phosphate mentioning

confidence: 98%

“…6) may attributable to different structural effects of the Mg 2+ and Zn 2+ ions. With the ZnO 4 groups, silica-like networks are formed in the zinc metaphosphate glasses [24]. The coordination number, N ZnO , is 4 in the metaphosphate glass and in the b-Zn(PO 3 ) 2 crystal, and N ZnO = 4.1 was found for a glass with y = 1.86 while in the c-Zn 2 P 2 O 7 crystal N ZnO is 5.…”

Section: Small-scale Heterogeneities In Magnesium and Zinc Phosphate mentioning

confidence: 98%

“…To get an idea of the heterogeneities existing in the Mg and Zn polyphosphate concentration range some results obtained in previous studies [6,7,24] by wide angle diffraction and 31 P MAS-NMR are worth considering. The Zn 2+ and the Mg 2+ ions possess highest electric field strength (0.52 · 10 20 m À2 for Zn 2+ , 0.53 · 10 20 m À2 for Mg 2+ [25]) among the mono and divalent modifier ions under discussion.…”

Section: Small-scale Heterogeneities In Magnesium and Zinc Phosphate mentioning

confidence: 99%

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The structure of phosphate glass evidenced by small angle X-ray scattering

Walter

Goerigk

Rüssel

2006

Journal of Non-Crystalline Solids

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Numerous phosphate glass systems with compositions covering the entire glass forming range have been examined by small angle Xray scattering. The experiments were carried out in a widely extended interval of s values between 0.055 and 31 nm À1 . A small angle scattering effect was detected for all samples investigated with the exception of the aluminium metaphosphate glass. The small angle scattering recorded indicates the presence of two differently-sized heterogeneity regions of electron density. The small-scale heterogeneities are present in magnesium and zinc phosphate glasses only. Their size is about 1 nm diameter in the magnesium and about 2 nm in the zinc phosphate glasses. The species do not result from liquid-liquid phase separation. Examinations to extract information on the nature of these heterogeneity regions are described in detail. There is no fundamental knowledge on the large-scale heterogeneities established. The small angle scattering suggests that their occurrence is related to water contamination. Anomalous small angle X-ray scattering experiments of a series of zinc polyphosphate glasses and a strontium metaphosphate glass sample are performed to examine the distribution of the Zn or Sr atoms, respectively.

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Phosphate Glasses

Mountjoy¹

2022

Atomistic Simulations of Glasses

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Structure of zinc phosphate glasses probed by neutron and X-ray diffraction of high resolving power and by reverse Monte Carlo simulations

Cited by 37 publications

References 46 publications

Properties and structures of TiO2-ZnO-P2O5 glasses

Properties and structures of TiO2-ZnO-P2O5 glasses

The structure of phosphate glass evidenced by small angle X-ray scattering

Phosphate Glasses

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