Analysis of oxide materials in steel industry by calibration-free laser -induced breakdown spectroscopy
PEDARNIG Johannes D1, HEITZ Johannes1, PRAHER Bernhard1, KOLMHOFER Philipp1
1. Christian Doppler Laboratory for Laser-Assisted Diagnostics, Institute of Applied Physics,
Johannes Kepler University Linz, Linz A-4040, Austria; 2. Voestalpine Stahl GmbH, Linz 4031, Austria
Abstract：Laser-induced breakdown spectroscopy (LIBS) is an attractive method for fast and quantitative materials characterization that can be employed for in-line monitoring in industrial processes. We report on the application of LIBS to the analysis of multi-component oxide materials. Slag from industrial steel production and mixed oxide test materials are analyzed by LIBS and the concentration of oxides is determined by a calibration-free (CF) method. For all materials investigated we find good match of the calculated CF-LIBS concentration values with reference values. The absolute errors are less than 2 wt % for most of the samples and oxide constituents. The concentration values are stable against large variations of measurement parameters. Our results indicate that LIBS has significant potential for innovative analytical sensing in steel industry.
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