Absorption of iron and water in the Na2O-CaO-MgO-SiO2 glasses. II. Selection of intrinsic, ferric, and ferrous spectra in the visible and UV regions

    Authors

    L. B. Glebov;E. N. Boulos

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    J. Non-Cryst. Solids

    Keywords

    Materials Science, Ceramics; Materials Science, Multidisciplinary

    Abstract

    Absorption spectra of a number of 13Na(2)O-10CaO-6MgO-71SiO(2) glass samples doped with iron were studied in the spectral range 3000-200 nm (3300-50 000 cm(-1)). The concentration of Fe2O3 in the glasses was varied from 8 x 10(-4) to 0.9 wt%. The absorption spectra of glass matrix, hydroxyl groups, ferric (Fe3+) and ferrous (Fe2+) ions were determined from experimental spectra. The exponential intrinsic absorption edge was found in the region of 213 nm (47 000 cm(-1)) in glasses with iron oxide concentration less than 10(-3) wt%. Absolute specific absorption spectra of Fe3+ and Fe2+ were determined for the whole spectral region. The absorption bands for the ferrous ion were observed in the region of 400 nm (25 000 cm(-1)) and for ferric ion at 500 nm (20 000 cm(-1)) which, to our knowledge, has not been reported. A simple algorithm was developed to describe the absorption of glass as a sum of absorption spectra of the glass matrix, hydroxyl and both forms of iron. (C) 1998 Elsevier Science B.V. All rights reserved.

    Journal Title

    Journal of Non-Crystalline Solids

    Volume

    242

    Issue/Number

    1

    Publication Date

    1-1-1998

    Document Type

    Article

    Language

    English

    First Page

    49

    Last Page

    62

    WOS Identifier

    WOS:000077592000007

    ISSN

    0022-3093

    Share

    COinS