Synthesis and spectroscopic properties of Er3+-doped CaF2 nanocrystals in transparent oxyfluoride tellurite glass–ceramics

Hou, Zhaoxia; Xue, Zhao-lu; Wang, Shaohong

doi:10.1016/j.jallcom.2011.11.013

Cited by 17 publications

(5 citation statements)

References 10 publications

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“…This suggestion is in agreement with A c c e p t e d M a n u s c r i p t [141], which showed that the emergence and growth of CaF 2 , SrF 2 , BaF 2 primary nanoparticles from SiO 2 -Al 2 O 3 -ZnF 2 -MF 2 glasses could be described by a simple kinetic equation with a single activation energy parameter (227,271 and 592 kJ/mol for M = Ca, Sr, Ba, respectively). However, the nature of nucleation centers in the oxyfluoride glass crystallization has yet to be clarified.…”

Section: Micro-liquationsupporting

confidence: 89%

Transparent oxyfluoride glass ceramics

Федоров

Luginina

Попов

2015

Journal of Fluorine Chemistry

281

123

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Section: Micro-liquationsupporting

confidence: 89%

Transparent oxyfluoride glass ceramics

Федоров

Luginina

Попов

2015

Journal of Fluorine Chemistry

281

123

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“…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 ]. Fluorotellurite glass-ceramics containing calcium and barium fluoride crystalline nanocrystals were also reported but with a final translucent aspect associated to crystallites scattering [ 52 , 53 , 54 , 55 ].…”

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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“…12,13 The presence of nanocrystals, that are small enough to prevent light scattering, allows rare earth or transition metal ions to incorporate into a 3 crystalline fluoride phase is a prominent criterion to develop efficiency of oxyfluorotellurite transparent glass-ceramics as active hosts. [14][15][16][17][18] Here, we report on a systematic investigation of the synthesis and crystallization of glasses in the ZrF 4 -TeO 2 system. This system, part of a quaternary Zr-Te-O-F system, was likely to present vitreous domains, as the well-known fluorozirconate glasses, the tellurite glasses and the oxyfluorotellurite glass domain already investigated in the binary TeO 2 -TeF 4 , near TeF 4 .…”

Section: Introductionmentioning

confidence: 99%

“…Tellurite and fluorotellurite glass-ceramics have driven interest as these materials can stabilize noncentrosymmetric crystalline phases that are a key focus in nonlinear optics, especially for second harmonic generation. , The presence of nanocrystals, small enough to prevent light scattering, allows the incorporation of rare earth or transition metal ions into a crystalline oxyfluoride phase, which is a prominent criterion to develop efficiency of oxyfluorotellurite transparent glass-ceramics as active hosts. − …”

Section: Introductionmentioning

confidence: 99%

Highly Transparent Fluorotellurite Glass-Ceramics: Structural Investigations and Luminescence Properties

et al. 2019

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Crystallization from glass can lead to the stabilization of metastable crystalline phases, which offers an interesting way to unveil novel binary or ternary compounds and control the optical properties of obtained glass-ceramics. Here, we report on a crystallization study of the ZrF 4 -TeO 2 glass system and show that under specific synthesis conditions, a previously unreported Zr 10 Te 9 O x F y zirconium oxyfluorotellurite anti-glass phase can be selectively crystallized at the nanometric scale within the 65TeO 2 -35ZrF 4 amorphous matrix. This leads to highly transparent glass-ceramics in both the visible and near infrared ranges. Under longer heattreatment, the stable cubic ZrTe 3 O 8 phase crystallizes in addition to the previous unreported anti-glass phase. The structure, microstructure and optical properties of different 65TeO 2 -35ZrF 4 Tm 3+ -doped glass-ceramics, were investigated in detail by means of X-ray diffraction, 2 scanning and transmission electron microscopies, 19 F, 91 Zr and 125 Te NMR, Raman and photoluminescence spectroscopies.Single crystals of this novel phase could be successfully synthesized from the liquid state and their basic structure has been determined. The crystal chemistry study of several samples evidences various superstructures along a, b and c axes and likely twinning of crystals, suggesting that the novel phase corresponds to a complex series of micro-phases rather than a stoichiometric compound. These results highlight the peculiar disorder-order phenomenon occurring in tellurite materials.

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Synthesis and spectroscopic properties of Er3+-doped CaF2 nanocrystals in transparent oxyfluoride tellurite glass–ceramics

Cited by 17 publications

References 10 publications

Transparent oxyfluoride glass ceramics

Transparent oxyfluoride glass ceramics

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

Highly Transparent Fluorotellurite Glass-Ceramics: Structural Investigations and Luminescence Properties

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