Effects of TiO2 and P2O5 on solarization and crystallization of photosensitive lithium silicate glass

Panah, Neda Ghaebi; Yekta, B. Eftekhari; Marghussian, V.K.; Mohaghegh, E.

doi:10.1016/j.jnoncrysol.2015.09.018

Cited by 16 publications

(12 citation statements)

References 26 publications

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“…The diffraction patterns are consistent with other oxide glasses, showing the amorphous "hump" typical of oxide glasses [46]. Whilst transition metal dopants can induce crystallisation in glass melts, the low doping concentrations in this study are below the thresholds observed in other studies [47,48]. [36,37].…”

Section: Discussionsupporting

confidence: 89%

Optical and structural properties of d0 ion-doped silicate glasses for photovoltaic applications

Allsopp¹,

Christopoulou²,

Brookfield³

et al. 2018

Phys. Chem. Glasses: Eur. J. Glass Sci. Technol. B

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Optical and structural properties of float-type soda lime silicate (SLS) glasses doped with 0.2 mol % TiO 2 , ZrO 2 , HfO 2 , Nb 2 O 5 , Ta 2 O 5 , MoO 3 or WO 3 have been studied. Under UV excitation all d 0 doped glasses exhibit broadband visible emission centred between 19,000 cm-1 and 25,000 cm-1 (400nm-525nm) due to a transition from the 2p orbital of O 2to the metal d 0 orbital. Dopant additions lead to shifts in the UV absorption edge to lower energies, with doped glasses having an absorption edge 2,000 cm-1 (~20nm), and in the case of MoO 3, 4,000 cm-1 (~40nm), lower than the corresponding undoped glass. Combined UV-Vis absorption and X-band EPR spectroscopy analyses confirm that dopant cations occur in the studied glasses in the expected oxidation states of Ti 4+ , Zr 4+ , Hf 4+ , Nb 5+ , Ta 5+ , Mo 6+ and W 6+ , although very low levels of Mo 5+ are also observed, as demonstrated by the EPR resonance at g=1.92 (3.7T). The incorporation of the studied dopants into SLS glasses may find applications as cover glasses in photovoltaic (PV) applications, providing UV protection of polymers and solar cell materials in PV units whilst enhancing solar cell efficiency through downconversion / fluorescence of absorbed UV photons with re-emission as visible photons, available for absorption and conversion by the solar cell material.

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Section: Discussionsupporting

confidence: 89%

Optical and structural properties of d0 ion-doped silicate glasses for photovoltaic applications

Allsopp¹,

Christopoulou²,

Brookfield³

et al. 2018

Phys. Chem. Glasses: Eur. J. Glass Sci. Technol. B

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“…The diffraction patterns are consistent with other oxide glasses, showing the amorphous "hump" typical of silicate glasses [124]. Transition metal ions have been used as nucleating agents in lithium disilicate glasses [258,274].…”

Section: Discussionsupporting

confidence: 77%

“…While the transition metals may induce crystallisation in glass melts, the low doping concentrations in this study are below the thresholds observed in other studies [129,258].…”

Section: Discussioncontrasting

confidence: 62%

“…configurations have the propensity for crystal nucleation in glasses due to their large ionic radii, high charge density and predilection for clustering [129]. However, the doping concentrations used in this study are below thresholds for crystallisation observed in other studies [258,259]. 0.10mol% Nb2O5 in lithium disilicate glass slightly decreases the steady state nucleation rate, resulting in fewer crystals developing relative to the base glass [259].…”

Section: Introductionmentioning

confidence: 62%

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Effects of d0 and s2 cations on optical properties of silicate glasses

Allsopp¹

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In partial fulfilment of its requirements for The Degree of Doctor of Philosophy 2 Declaration I hereby declare, that the thesis entitled 'Effects of d 0 and s 2 cations on optical properties of silicate glasses' is a result of my original work and investigation. None of the results presented in the manuscript have been lifted from any other sources and legitimate references are presented where necessary. Name:Signature:The copyright of this thesis rests with the author and no quotations from it or information derived from it may be published without prior written consent of the author. 3 Published work and conferences Aspects of the work described in the thesis were published in:• Optical and structural properties of d 0 ion doped silicate glasses for photovoltaic applications. B.

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“…These compositions also consist of other components like Al 2 O 3 for chemical durability and a nucleating agent to aid in the control of nucleation. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Past work studying lithium disilicate glass-ceramics has revealed much about the evolution of lithium metasilicate (Li 2 SiO 3 ) into lithium disilicate as the primary phase of these materials. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Lithium metasilicate is the primary phase at lower growth temperatures because it has a higher growth rate initially.…”

Section: Introductionmentioning

confidence: 99%

Examining the phase evolution of lithium disilicate glass‐ceramics with lithium tantalate as a secondary phase

et al. 2021

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Lithium disilicate glass-ceramics were discovered in the 1950s, and the evolution of the main target phase of these materials is well known. However, the lithium disilicate system is still an area of active research, especially when a secondary phase is introduced since the phase evolution of secondary phases is not currently understood. The present study examines the main target phases, as well as a secondary phase of lithium tantalate, via X-ray diffraction. A large data set is obtained to investigate the evolution of all phases. It is found that the nucleation of the precursor lithium metasilicate phase is coupled to both the nucleation of the primary target phase, lithium disilicate, and the nucleation of lithium tantalate. A reaction equation describing this relationship is proposed.

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Effects of TiO2 and P2O5 on solarization and crystallization of photosensitive lithium silicate glass

Cited by 16 publications

References 26 publications

Optical and structural properties of d0 ion-doped silicate glasses for photovoltaic applications

Optical and structural properties of d0 ion-doped silicate glasses for photovoltaic applications

Effects of d0 and s2 cations on optical properties of silicate glasses

Examining the phase evolution of lithium disilicate glass‐ceramics with lithium tantalate as a secondary phase

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