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Spectroscopic Elucidation of Lanthanide Cation Dissolution Mechanism in Borosilicate Glass
Published online by Cambridge University Press: 14 March 2011
Abstract
Oxides of lanthanide dissolution in a Na2O-Al2O3-B2O3-SiO2 glass using Gd as a probe was studied in detail using Raman, fluorescence, and phonon sideband (PSB) spectroscopic techniques. A mechanism of Gd cation dissolution, via partitioning, in the borate-rich and silicate-rich environments was confirmed by examining characteristics of the Raman band evolution, fluorescence emission and lifetime, and PSBs. The study concluded that i) Gd(III) cations in the borate-rich environment resembles Gd-metaborate local structure, i.e., 1BO4:1Gd:2BO3, ii) Gd cations partitioning in the borate-rich environment at low Gd2O3 concentration, [Gd2O3] -1/3[B2O3] < 0, and iii) excess Gd(III) cations, [Gd2O3]–1/3[B2O3], in the silicate-rich environment at high Gd2O3 concentration, [Gd2O3]–1/3[B2O3]>0.
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- Copyright © Materials Research Society 2002
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