Preparation and structural characterization of some Fe2O 3-B2O3-ZnO glasses and glass ceramics

Abstract

X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy have been employed to investigate the (Fe2O3) x·(B2O3)(60-x)·(ZnO) 40 samples, with 0 ≤ x ≤ 20 mol%. The samples have been prepared by melting at 1100 °C for 10 minutes followed by rapid cooling at room temperature. The structure of samples was analyzed by means of XRD. XRD pattern show that the sample without iron ions and the samples contained 3 and 5 mol% were glasses. For samples contain 10, 15 and 20 mol% Fe2O 3 it obtains glass ceramics. These glass ceramics contains a unique crystalline phase, zinc ferrite (ZnFe2O4), embedded in an amorphous matrix. FTIR spectroscopy data suggest that for the glass samples the iron ions play the network modifier role. These data show that the glass network consists of BO3 and BO4 structural units. For glass ceramics samples FTIR spectra show characteristic bands of ZnFe 2O4. © 2009 IOP Publishing Ltd.