Glass forming ability and thermal stability of oxyfluoride glasses

Marquesi, A. R.; Delben, J. R. J.; Delben, A. A. S. T.

doi:10.1007/s10973-008-9218-5

Cited by 13 publications

(4 citation statements)

References 31 publications

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“…This is attributed to the disruption of the glass network by fluorine. Similar phenomenon was observed in fluorine‐containing aluminosilicate, calcium‐aluminate, phosphor‐aluminosilicate, phosphor‐calcium‐alumino‐silicate and silicate glasses …”

Section: Resultssupporting

confidence: 80%

Effect of fluorine on the optical properties of BaF₂‐BaO‐La₂O₃‐B₂O₃ glasses prepared by containerless processing

Chung

Yanaba

Nakatsuka

et al. 2018

Int J of Appl Glass Sci

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The glass-forming region of the BaO-La 2 O 3 -B 2 O 3 ternary system was determined by using a containerless processing. Moreover, we prepared2 O 3 (x = 0-20 mol%) and xBaF 2 -(20-x) BaO-10La 2 O 3 -70B 2 O 3 (x = 0-20 mol%) novel oxyfluoride glasses. The glass transition temperature, density, refractive index, and the Abbe number of these glasses were investigated. The effects of the substitution of fluorine for oxygen on the refractive index and Abbe number were discussed on the basis of electronic polarizability and resonance wavelength of oscillator. The refractive indices decreased but Abbe number increased with increasing fluorine concentration because of the decrease in resonance wavelength of oscillator. By substituting fluorine for oxygen, we developed new optical glasses (n d = 1.68-1.74, v d = 46-60). The fractions of BO 4 unit of oxide and oxyfluoride glasses were analyzed by the 11 B NMR.The conversion between BO 3 and BO 4 units was observed when fluorine is added to oxide glasses because, fluorine bonds with network modifier cations and the available number of network modifiers decrease with increasing fluorine concentration. These results are helpful for designing new optical glasses that are controlled to have relatively high refractive index and lower wavelength dispersion.

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Section: Resultssupporting

confidence: 80%

Effect of fluorine on the optical properties of BaF₂‐BaO‐La₂O₃‐B₂O₃ glasses prepared by containerless processing

Chung

Yanaba

Nakatsuka

et al. 2018

Int J of Appl Glass Sci

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“…As a result of this destructive substitution, glass viscosity and the glass transition temperature (T g ) decrease drastically [12]. Fluorine content has been shown to have a strong effect on the reduction of the glass transition temperature in a variety of glass systems such as fluoro-alumino-silicate, calcium-fluoro-aluminate, phosphor-fluoro-alumino-silicate, phosphorfluoro calcium-alumino-silicate, phosphor-fluoro-silicate, and fluoro-silicate glasses [13,14].…”

Section: Introductionmentioning

confidence: 99%

Influence of fluorine on thermal properties of lead oxyfluoride glass

Reben

Środa

2013

J Therm Anal Calorim

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Oxyfluoride glasses are the basic materials for obtaining transparent glass-ceramic (TGC) which can be used in a wide range of optoelectronics devices such as: amplifiers, up-conversion, telescopes, laser sources. Oxyfluoride TGC is obtained by the control heat treatment of the parent glass due to low phonon nanocrystalline phases. The oxyfluoride glasses from the sodium-lead-silica system were the object of investigation. The influence of fluoride content on the thermal properties of glasses was analyzed. Thermal characteristics of glasses like the transition temperature T g , the temperature for the crystallization onset T x , and the maximum crystallization temperature T c , thermal stability parameter were determined by DTA/DSC method. The linear expansion coefficients of oxyfluoride glasses as a function of temperature were measured using a thermomechanical analyzer (TMA 7 Perkin-Elmer). The effect of crystallization on the thermal expansion coefficient and softening temperature T s was found.

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“…However, fluoride glasses have some drawbacks compared to oxide glasses, such as poor chemical and mechanical stabilities. Substantial improvements have been reported in spectroscopic and physical properties of these glasses, either by the combination of oxides with fluorides, or by controlling the crystallization, leading to glass-ceramic systems [7,8].…”

Section: Introductionmentioning

confidence: 99%

Thermal stability and crystallization behavior of TiO2 doped ZBLAN glasses

Santos

Delben

et al. 2011

Journal of Non-Crystalline Solids

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ZBLAN glasses with the composition (in mol%) of (100 − x)(53 ZrF 4 +19 BaF 2 + 5LaF 3 +3AlF 3 +20NaF)+xTiO 2 (x = 0, 1.0 and 2.0 mol%) were prepared using a conventional melting technique in dry nitrogen atmosphere. The thermal stability, glass-forming ability, and crystallization kinetics of the ZBLAN system as a function of the TiO 2 concentrations were investigated by Differential Scanning Calorimetry (DSC). Also, the crystalline phases were determined by X-ray Diffraction (XRD). Our study indicates that adding TiO 2 in a fluoride system improves the thermal parameters of the glass, which is interesting for applications as optical fiber.

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Glass forming ability and thermal stability of oxyfluoride glasses

Cited by 13 publications

References 31 publications

Effect of fluorine on the optical properties of BaF₂‐BaO‐La₂O₃‐B₂O₃ glasses prepared by containerless processing

Effect of fluorine on the optical properties of BaF₂‐BaO‐La₂O₃‐B₂O₃ glasses prepared by containerless processing

Influence of fluorine on thermal properties of lead oxyfluoride glass

Thermal stability and crystallization behavior of TiO2 doped ZBLAN glasses

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Glass forming ability and thermal stability of oxyfluoride glasses

Cited by 13 publications

References 31 publications

Effect of fluorine on the optical properties of BaF2‐BaO‐La2O3‐B2O3 glasses prepared by containerless processing

Effect of fluorine on the optical properties of BaF2‐BaO‐La2O3‐B2O3 glasses prepared by containerless processing

Influence of fluorine on thermal properties of lead oxyfluoride glass

Thermal stability and crystallization behavior of TiO2 doped ZBLAN glasses

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Effect of fluorine on the optical properties of BaF₂‐BaO‐La₂O₃‐B₂O₃ glasses prepared by containerless processing

Effect of fluorine on the optical properties of BaF₂‐BaO‐La₂O₃‐B₂O₃ glasses prepared by containerless processing