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Erschienen in:
01.06.2010
FTIR and Raman spectroscopic investigation of some strontium–borate glasses doped with iron ions
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 6/2010
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Abstract
Structural investigation of xFe2O3·(100 − x)[3B2O3·SrO] glass system, with 0 ≤ x ≤ 40 mol%, was performed by means of X-Ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopies. The purpose of this work was to investigate the structural changes that appear in the 3B2O3·SrO glass matrix with the addition and increasing of iron ions content. The XRD pattern for the prepared samples shows that vitreous phase is present only for x ≤ 40 mol%. For sample containing 50 mol% Fe2O3 was evidenced the presence of a unique crystalline phase, Fe2O3, embedded in an amorphous matrix. FTIR data show that BO3 and BO4 are the main structural units of the glass system and the iron ions are located in the network. The Raman spectrum of glass matrix indicates a structure with several borate groups (di-, meta-, pyro-borate, etc.). In higher concentrations the iron ions break the regulate glass network and determines the appearance of BO4 isolated units.