Structure and property of multicomponent germanate glass containing Y<sub>2</sub>O<sub>3</sub>

Xiao, Zhou; Lu, Anxian; Zuo, Cheng Gang

doi:10.1179/174367608x372899

Cited by 21 publications

(10 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This region contains the most remarkable variations concerning the bonds in germanate glasses. The band located in the 700–1100 cm −1 range, has been associated to active stretching and deformations in vibration modes of Ge‐O‐Ge and O‐Ge‐O bonds . The bands in the absorption region from 800 to 850 cm −1 are characteristic of glasses with a combination of Ge ions in coordination 4 and 6.…”

Section: Resultsmentioning

confidence: 98%

Effect of CeO₂ on the Glass Structure of Sodium Germanate Glasses

et al. 2014

View full text Add to dashboard Cite

Germanate glasses have potential applications as optical fibers. Materials doped with rare earth ions are good candidates for optical, lasing, and magnetic applications. Based on the ternary system, CeO 2 -Na 2 O-GeO 2 a series of six glasses were fabricated using powder fusion, and varying the Na 2 O content from 0 to 45 mol%, and a CeO 2 content constant at 3 mol%. The glasses were analyzed by FT-IR, Raman and X-ray photoelectron (XPS) spectroscopies to obtain information about the glass structure, cerium oxidation's state and how it is introduced in the glass network. FT-IR and Raman spectra revealed the presence of GeO 6 and GeO 4 groups as well as Q 2 and Q 3 units in the glasses with alkali low content. XPS spectra analysis revealed that the cerium ions were reduced from Ce 4+ to Ce 3+ . The nonbonding to total oxygen ratio was estimated from the curve fitting of the O 1s core level spectra. Density and elastic parameters showed a nonlineal tendency in the change of the physical properties as a function of Na 2 O content. Finally, photoluminescence spectroscopy confirmed the presence of Ce 3+ ions. The characteristic 4f ? 5d electronic transitions at 360 nm were detected, when a 280 nm excitation line of pulsed laser was used as excitation source.

show abstract

Section: Resultsmentioning

confidence: 98%

Effect of CeO₂ on the Glass Structure of Sodium Germanate Glasses

et al. 2014

View full text Add to dashboard Cite

show abstract

“…26,27 The region between 700 and 900 cm Àl can be associated not only with the active asymmetric stretching and deformation in vibration modes of Ge-O-Ge and O-Ge-O bonds, but also with the short Al-O distance in distorted AlO 4 or AlO 6 . 27,28 It is also hard to quantify the percentages of Al polyhedral in each sample just based on the FTIR spectra.…”

Section: Resultsmentioning

confidence: 99%

Efficient Enhancement of Bismuth NIR Luminescence by Aluminum and Its Mechanism in Bismuth‐Doped Germanate Laser Glass

et al. 2016

View full text Add to dashboard Cite

As a new member of laser glass family, bismuth‐doped glasses have received rising interests due to the application of fiber amplifiers and laser sources in the new spectral range for the next‐generation optical communication system. For practical application of the glasses, it must be considered on how to improve the luminescence efficiency. Here, we demonstrate that addition of aluminum can enhance the bismuth near‐infrared luminescence by more than 10 000 times, which is right followed by the discussion on the mechanism on why this can happen. We believe this work can be helpful for designing bismuth‐doped multiple component laser glasses with high efficiency. In addition, because of high susceptibility of bismuth to local field change, it can be used as probe ion to envision glass structures. Using bismuth as a luminescent structural probe, we can see the modifier ions of Bi+ are not completely randomly distributed inside germanate glass and they prefer the residence around tetrahedral AlO4 sites.

show abstract

“…Another significant finding relating to T g is that GeO 2 has a greater effect on this property than B 2 O 3 (Table 3), likely due to the difference in their respective thermal expansion coefficients (6.1 > 5 mm m À1 ÁK À1 , for GeO 2 and B 2 O 3 respectively). [77][78][79] It is also known that the T g for vitreous boric glass (220 C) 73 is much less than germanate glass (576 C). 80 The regression analysis for T g does not allow us to conclude whether the system prefers one transformation (BO 4 depolymerization) over the other (GeO 5 / GeO 6 depolymerization), but it is found that at ZnO ¼ 0.266 mol fraction, the effect of GeO 2 and ZnO Â GeO 2 on T g are the same as the effect of B 2 O 3 and ZnO Â B 2 O 3 on T g (Figure 1).…”

Section: Discussionmentioning

confidence: 98%

Composition-structure-property relationships for non-classical ionomer cements formulated with zinc-boron germanium-based glasses

2014

View full text Add to dashboard Cite

Non-classical ionomer glasses like those based on zinc-boron-germanium glasses are of special interest in a variety of medical applications owning to their unique combination of properties and potential therapeutic efficacy. These features may be of particular benefit with respect to the utilization of glass ionomer cements for minimally invasive dental applications such as the atruamatic restorative treatment, but also for expanded clinical applications in orthopedics and oral-maxillofacial surgery. A unique system of zinc-boron-germanium-based glasses (10 compositions in total) has been designed using a Design of Mixtures methodology. In the first instance, ionomer glasses were examined via differential thermal analysis, X-ray diffraction, and (11)B MAS NMR spectroscopy to establish fundamental composition - structure-property relationships for the unique system. Secondly, cements were synthesized based on each glass and handling characteristics (working time, Wt, and setting time, St) and compression strength were quantified to facilitate the development of both experimental and mathematical composition-structure-property relationships for the new ionomer cements. The novel glass ionomer cements were found to provide Wt, St, and compression strength in the range of 48-132 s, 206-602 s, and 16-36 MPa, respectively, depending on the ZnO/GeO2 mol fraction of the glass phase. A lower ZnO mol fraction in the glass phase provides higher glass transition temperature, higher N4 rate, and in combination with careful modulation of GeO2 mol fraction in the glass phase provides a unique approach to extending the Wt and St of glass ionomer cement without compromising (in fact enhancing) compression strength. The data presented in this work provide valuable information for the formulation of alternative glass ionomer cements for applications within and beyond the dental clinic, especially where conventional approaches to modulating working time and strength exhibit co-dependencies (i.e. the enhancement of one property comes at the expense of the other) and therefore limit development strategies.

show abstract

Structure and property of multicomponent germanate glass containing Y₂O₃

Cited by 21 publications

References 34 publications

Effect of CeO₂ on the Glass Structure of Sodium Germanate Glasses

Effect of CeO₂ on the Glass Structure of Sodium Germanate Glasses

Efficient Enhancement of Bismuth NIR Luminescence by Aluminum and Its Mechanism in Bismuth‐Doped Germanate Laser Glass

Composition-structure-property relationships for non-classical ionomer cements formulated with zinc-boron germanium-based glasses

Contact Info

Product

Resources

About

Structure and property of multicomponent germanate glass containing Y2O3

Cited by 21 publications

References 34 publications

Effect of CeO2 on the Glass Structure of Sodium Germanate Glasses

Effect of CeO2 on the Glass Structure of Sodium Germanate Glasses

Efficient Enhancement of Bismuth NIR Luminescence by Aluminum and Its Mechanism in Bismuth‐Doped Germanate Laser Glass

Composition-structure-property relationships for non-classical ionomer cements formulated with zinc-boron germanium-based glasses

Contact Info

Product

Resources

About

Structure and property of multicomponent germanate glass containing Y₂O₃

Effect of CeO₂ on the Glass Structure of Sodium Germanate Glasses

Effect of CeO₂ on the Glass Structure of Sodium Germanate Glasses