Fluoride and oxyfluoride glasses for optical applications

Nazabal, Virginie; Poulain, Marcel; Olivier, Mélinda; Pirasteh, Parastesh; Camy, Patrice; Doualan, Jean‐Louis; Guy, S.; Djouama, Torkia; Boutarfaïa, Ahmed; Adam, Jean-Luc

doi:10.1016/j.jfluchem.2011.06.035

Cited by 82 publications

(35 citation statements)

References 12 publications

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“…However, these fluoride based glasses have various regular features, such as the chemical reactivity of fluoride melts, devitrification tendency and responsiveness to water. In that sense, the combination of oxides and fluorides, particularly oxyfluorophosphate glasses, appears to be very interesting and attractive materials [7,8].…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and mechanical properties of ternary CaO-CaF2-P2O5 glasses

Rao

Shashikala

2014

J Adv Ceram

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Abstract:The ternary phosphate glass series (50x)CaO-xCaF 2 -50P 2 O 5 (x = 0-20 mol%) were synthesized using melt quench technique. Structural, optical and mechanical properties were investigated with increase in CaF 2 content. Using X-ray diffraction (XRD), synthesized glasses were confirmed to be amorphous in nature. Replacement of oxygen ions by fluorine ions increased the values of density. Decrease in refractive index due to the low polarizability of fluorine ions in the glass matrix was observed. In Fourier transform infrared (FTIR) spectra, the slight variation in as  (PO 2 ) band position and intensity could be attributed to replacement of fluorine ions for oxygen ions in phosphate glass structure. These data were well supported by Raman spectra. Optical band gap energy increased from 3.44 eV to 3.64 eV with increase in CaF 2 content, and Urbach energy decreased suggesting that the fluorine ions reduced the tail energy states in the band gap compared to the oxygen ions. Mechanical parameters such as Vickers hardness, fracture toughness and brittleness were evaluated from the Vickers micro indentation measurements. Increase in Vickers hardness, decrease in fracture toughness and increase in brittleness were observed with increase in CaF 2 content.

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Section: Introductionmentioning

confidence: 99%

Structural, optical and mechanical properties of ternary CaO-CaF2-P2O5 glasses

Rao

Shashikala

2014

J Adv Ceram

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“…11,21,67,68 In the present samples, we observe the opposite effect. As discussed later this observation may be related to the fluoride losses encountered in these samples, which are most likely also accompanied by F/O-exchange in the atmosphere.…”

Section: Source:by the Authorcontrasting

confidence: 64%

“…For example, fluorophosphate glasses have optical properties that are comparable to those of fluoride glasses and mechanical properties that are comparable to those of oxide glasses. 3,11 This favorable situation arises from the fact that the photophysical properties of the rare earth ion emitters are primarily controlled by the local environments of the rare earth ions (which are thought to be dominantly fluoride ions), whereas the bulk properties are dominated by the structural makeup of the host framework, which is strengthened by bridging oxygen atoms. [12][13][14] Owing to this synergetic effect, fluorophosphate glasses have a variety of technological applications such as optical amplifiers and high power lasers.…”

Section: Oxyfluoride and Fluorophosphate Glassesmentioning

confidence: 99%

Caracterização estrutural de vidros fluorofosfatos utilizando metodologias de RMN

Silva¹

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“…According to the definition of density, molar volumes (V m ) of samples were obtained by applying Eq. (2).…”

Section: Methodsmentioning

confidence: 99%

“…Among the variable glassy systems, an increasing interest has been devoted to the fluoride glasses because of their suitable optical properties, i.e., low phonon energy (~500 cm −1 ) and high transparency [1,2]. In contrary to their undeniable optical advantages, fluoride glasses have less favorable chemical, thermal and mechanical properties in parallel with fabrication problems [3].…”

Section: Introductionmentioning

confidence: 99%