Properties and structure of lanthanum phosphate glasses

Richardk Brow; Ezzeldin Metwalli; Davidl Sidebottom

doi:10.1117/12.405272

Properties and structure of lanthanum phosphate glasses

Richardk Brow, Ezzeldin Metwalli, Davidl Sidebottom

Department of Physics

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Glasses were prepared from the system xLa₂O₃·(1-x)P₂O₅, where 0.00≤x≤0.30 (mole fraction), and densities, refractive indices and glass transition temperatures were determined. Inflections in the property/composition trends were observed at x approximately 0.15 La₂O₃. Raman spectra indicate that the phosphate network evolves from a cross-linked ultraphosphate to chain-like metaphosphate with increasing x. The property and spectral trends are interpreted with respect to the La-coordination environment, which appears to change from isolated La-polyhedra to a La-O-La subnetwork when x≥0.15.

Original language	English (US)
Pages (from-to)	88-94
Number of pages	7
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4102
DOIs	https://doi.org/10.1117/12.405272
State	Published - Jan 1 2000

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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title = "Properties and structure of lanthanum phosphate glasses",

abstract = "Glasses were prepared from the system xLa2O3·(1-x)P2O5, where 0.00≤x≤0.30 (mole fraction), and densities, refractive indices and glass transition temperatures were determined. Inflections in the property/composition trends were observed at x approximately 0.15 La2O3. Raman spectra indicate that the phosphate network evolves from a cross-linked ultraphosphate to chain-like metaphosphate with increasing x. The property and spectral trends are interpreted with respect to the La-coordination environment, which appears to change from isolated La-polyhedra to a La-O-La subnetwork when x≥0.15.",

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AU - Sidebottom, Davidl

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N2 - Glasses were prepared from the system xLa2O3·(1-x)P2O5, where 0.00≤x≤0.30 (mole fraction), and densities, refractive indices and glass transition temperatures were determined. Inflections in the property/composition trends were observed at x approximately 0.15 La2O3. Raman spectra indicate that the phosphate network evolves from a cross-linked ultraphosphate to chain-like metaphosphate with increasing x. The property and spectral trends are interpreted with respect to the La-coordination environment, which appears to change from isolated La-polyhedra to a La-O-La subnetwork when x≥0.15.

AB - Glasses were prepared from the system xLa2O3·(1-x)P2O5, where 0.00≤x≤0.30 (mole fraction), and densities, refractive indices and glass transition temperatures were determined. Inflections in the property/composition trends were observed at x approximately 0.15 La2O3. Raman spectra indicate that the phosphate network evolves from a cross-linked ultraphosphate to chain-like metaphosphate with increasing x. The property and spectral trends are interpreted with respect to the La-coordination environment, which appears to change from isolated La-polyhedra to a La-O-La subnetwork when x≥0.15.

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