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The effect of nitrogen addition on certain properties and structure of fluorozirconate glasses

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Abstract

The effect of nitrogen on the properties and structure of fluorozirconate glasses in the system ZrF4-BaF2-LaF3-AlF3 (ZBLA) was investigated. Nitrogen was introduced by means of aluminium nitride. The substitution of fluorine by nitrogen in ZBLA glasses resulted in a considerable increase of microhardness, reduction of the linear expansion coefficient, and a small increase in characteristic temperatures. Structural investigations comprised RDF and Fourier transform-infrared (FT-IR) examinations. From radial distribution function (RDF) it followed that the introduction of nitrogen caused an increase of the mean distances Zr-F(N), Ba-F(N), La-F(N). From FT-IR spectra, it followed that nitrogen became incorporated into the bridging fluorine atoms which was evinced by a shifting of bands deriving from the bending vibrations between the [ZrF6]2− octahedra towards higher wave numbers.

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  1. Department of Glass and Enamels, University of Mining and Metallurgy, Cracow, Poland

    L. Samek

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  1. L. Samek
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Samek, L. The effect of nitrogen addition on certain properties and structure of fluorozirconate glasses. JOURNAL OF MATERIALS SCIENCE 30, 5649–5651 (1995). https://doi.org/10.1007/BF00356699

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  • DOI: https://doi.org/10.1007/BF00356699

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