Transition metal fluorophosphate glasses

Matecki, M.; Poulain, Marcel

doi:10.1016/0022-3093(83)90455-6

Cited by 29 publications

(17 citation statements)

References 1 publication

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“…These compounds are more stable to moisture than other metaphosphates. Phosphate glasses based on the alkali metaphosphates are hygroscopic, but addition of¯uorides increases the resistance to water [6]. Numerous NaPO 3 ±BaF 2 based¯uorophosphate glasses are known, either with a high content of transition metal ions [6] or rare-earth ions [7,8].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic properties of trivalent lanthanide ions in fluorophosphate glasses

Binnemans

Deun

Görller‐Walrand

et al. 1998

Journal of Non-Crystalline Solids

130

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We describe the spectroscopic properties of the trivalent lanthanide ions Ce 3 , Pr 3 , Nd 3 , Sm 3 , Eu 3 , Gd 3 , Tb 3 , Dy 3 , Ho 3 , Er 3 , Tm 3 and Yb 3 in the¯uorophosphate glasses 75NaPO 3 ±24CaF 2 ±1LnF 3 and 75NaPO 3 ±20CaF 2 ± 5LnF 3 (where Ln lanthanide ion). Absorption and luminescence spectra are discussed. The dipole strengths of the transitions in the absorption spectrum are parametrized in terms of three X k (k 2, 4 and 6) Judd±Ofelt intensity parameters. These phenomenological parameters are used to predict the luminescence properties of the lanthanide ions in the¯uorophosphate glasses. Attention is paid to the trend of the intensity parameters over the lanthanide series. á 1998 Elsevier Science B.V. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Spectroscopic properties of trivalent lanthanide ions in fluorophosphate glasses

Binnemans

Deun

Görller‐Walrand

et al. 1998

Journal of Non-Crystalline Solids

130

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“…The transforma- 3 2 are more stable to moisture than other metaphosphates. tion of the oxide into the fluoride is done by mixing the Phosphate glasses based on the alkali metaphosphates are neodymium oxide with an excess (23 the stoichiometric hygroscopic, but addition of fluorides increases the resistamount) of ammonium bifluoride (NH F,HF) and heating 4 ance to water [6]. Numerous NaPO -BaF based fluorothe mixture in a vitreous carbon crucible for 3 h. During phosphate glasses are known, either with a high content of this fluorination step a complex fluoride (NH ) NdF is 4 3 6 transition metal ions [6] or rare-earth ions [7,8].…”

Section: Introduction 2 Experimental Detailsmentioning

confidence: 99%

Optical properties of Nd3+-doped fluorophosphate glasses

Binnemans

Deun

Görller‐Walrand

et al. 1998

Journal of Alloys and Compounds

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31Optical absorption spectra of Nd -doped fluorophosphate glasses of the type 75NaPO -24AF-1NdF (A5Li, Na, K) and of the type phenomenological Judd-Ofelt intensity parameters V (l52, 4 and 6). With the knowledge of these intensity parameters, the probability l for spontaneous emission, the branching ratios and the radiative lifetime are calculated. The relation between the spectral intensities and the glass composition is discussed. The optical properties of the fluorophosphate glasses are compared with those of phosphate and fluoride glasses. It is shown that the choice of the cation only has a minor influence on the spectral intensities. The spectral behaviour of the fluorophosphate glasses is intermediate between the spectral behaviour of pure phosphate and fluoride glasses. © 1998 Elsevier Science S.A.

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“…While such glasses have been characterized, their stability against devitrification is limited as they require fast cooling rates, which does not allow thick samples to be obtained. The incorporation of sodium polyphosphate (Na(PO 3 )) n 2 appears as a simple way to increase glass stability, as this has already been reported in the Na(PO 3 )-BaF 2 -MnF 2 ternary system [7]. This additive keeps a low temperature of melting, which limits fluorine losses that occur with the formation of gaseous POF 3 .…”

Section: Introductionmentioning

confidence: 96%

Fluorophosphate glasses containing manganese

Djouama

Boutarfaïa

Poulain

2008

Journal of Physics and Chemistry of Solids

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New fluorophosphate glasses based on MnF 2 , NaPO 3 and MF n (M = Zn 2+ , Sr 2+ , Mg 2+ , Ba 2+ , Li + , Na + and K + ) have been synthesised and characterized. Large vitreous areas were observed. Samples of 4 mm in thickness have been obtained. These glasses are easy to prepare and stable in ambient air. Depending on the composition and the nature of the M cation, glass transition temperature, Tg, lies between 230 and 314°C, crystallisation temperature, Tx is between 320 and 475°C. These glasses are pink coloured, and infrared transmission extends up to 4.5 m with extrinsic OH -absorption band at 3200 cm -1 and other bands around 2200 and 1600 cm -1 that relate to PO 4 tetrahedron vibration. Other physical properties including density, microhardness, Young modulus, thermal expansion and refractive index were investigated and correlated to composition.

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Transition metal fluorophosphate glasses

Cited by 29 publications

References 1 publication

Spectroscopic properties of trivalent lanthanide ions in fluorophosphate glasses

Spectroscopic properties of trivalent lanthanide ions in fluorophosphate glasses

Optical properties of Nd3+-doped fluorophosphate glasses

Fluorophosphate glasses containing manganese

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