Silver aggregates in photoluminescent phosphate glasses of the `Ag2O-ZnO-P2O5' system

I. Belharouak; C. Parent; B. Tanguy; G. Le Flem; M. Couzi

doi:10.1016/S0022-3093(99)00014-9

Silver aggregates in photoluminescent phosphate glasses of the `Ag₂O-ZnO-P₂O₅' system

I. Belharouak, C. Parent, B. Tanguy, G. Le Flem, M. Couzi

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Abstract

Photoluminescent properties of glasses of the Ag₂O-ZnO-P₂O₅ system are reported. The compositions of the glasses are limited by the polyphosphate and diphosphate domain of this system. The phosphate structural units of the network former are deduced from Raman spectra. A comparison with the luminescent properties of crystallized silver phosphates of similar composition allows identification of two different emitting centers: isolated Ag⁺, Ag⁺-Ag⁺ pairs, and a third center resulting from an Ag⁺-Zn²⁺ interaction. The introduction of 1 mol% SiO₂ or Al₂O₃ in these glasses leads to precipitation of silver particles, whose dimensions range from nanometers to micrometers, and to the appearance of luminescent centers (Ag₂)⁺ detected around the micrometer particles by optical microscopy. We assume that these centers are an intermediate stage during the process of silver precipitation.

Original language	English
Pages (from-to)	238-249
Number of pages	12
Journal	Journal of Non-Crystalline Solids
Volume	244
Issue number	2
DOIs	https://doi.org/10.1016/S0022-3093(99)00014-9
State	Published - Mar 2 1999
Externally published	Yes

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title = "Silver aggregates in photoluminescent phosphate glasses of the `Ag2O-ZnO-P2O5' system",

abstract = "Photoluminescent properties of glasses of the Ag2O-ZnO-P2O5 system are reported. The compositions of the glasses are limited by the polyphosphate and diphosphate domain of this system. The phosphate structural units of the network former are deduced from Raman spectra. A comparison with the luminescent properties of crystallized silver phosphates of similar composition allows identification of two different emitting centers: isolated Ag+, Ag+-Ag+ pairs, and a third center resulting from an Ag+-Zn2+ interaction. The introduction of 1 mol% SiO2 or Al2O3 in these glasses leads to precipitation of silver particles, whose dimensions range from nanometers to micrometers, and to the appearance of luminescent centers (Ag2)+ detected around the micrometer particles by optical microscopy. We assume that these centers are an intermediate stage during the process of silver precipitation.",

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T1 - Silver aggregates in photoluminescent phosphate glasses of the `Ag2O-ZnO-P2O5' system

AU - Belharouak, I.

AU - Parent, C.

AU - Tanguy, B.

AU - Le Flem, G.

AU - Couzi, M.

PY - 1999/3/2

Y1 - 1999/3/2

N2 - Photoluminescent properties of glasses of the Ag2O-ZnO-P2O5 system are reported. The compositions of the glasses are limited by the polyphosphate and diphosphate domain of this system. The phosphate structural units of the network former are deduced from Raman spectra. A comparison with the luminescent properties of crystallized silver phosphates of similar composition allows identification of two different emitting centers: isolated Ag+, Ag+-Ag+ pairs, and a third center resulting from an Ag+-Zn2+ interaction. The introduction of 1 mol% SiO2 or Al2O3 in these glasses leads to precipitation of silver particles, whose dimensions range from nanometers to micrometers, and to the appearance of luminescent centers (Ag2)+ detected around the micrometer particles by optical microscopy. We assume that these centers are an intermediate stage during the process of silver precipitation.

AB - Photoluminescent properties of glasses of the Ag2O-ZnO-P2O5 system are reported. The compositions of the glasses are limited by the polyphosphate and diphosphate domain of this system. The phosphate structural units of the network former are deduced from Raman spectra. A comparison with the luminescent properties of crystallized silver phosphates of similar composition allows identification of two different emitting centers: isolated Ag+, Ag+-Ag+ pairs, and a third center resulting from an Ag+-Zn2+ interaction. The introduction of 1 mol% SiO2 or Al2O3 in these glasses leads to precipitation of silver particles, whose dimensions range from nanometers to micrometers, and to the appearance of luminescent centers (Ag2)+ detected around the micrometer particles by optical microscopy. We assume that these centers are an intermediate stage during the process of silver precipitation.

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Silver aggregates in photoluminescent phosphate glasses of the `Ag₂O-ZnO-P₂O₅' system

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