Thermal treatment of chromium(III) oxide with carbonates analyzed by far-infrared spectroscopy

Christian Vogel; Jan Stemann; Karsten Holldack; Ryo Sekine; Ewelina Lipiec; Christian Adam

doi:10.1366/15-07878

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Thermal treatment of chromium(III) oxide with carbonates analyzed by far-infrared spectroscopy

Journal article

Peer reviewed

Thermal treatment of chromium(III) oxide with carbonates analyzed by far-infrared spectroscopy

Christian Vogel, Jan Stemann, Karsten Holldack, Ryo Sekine, Ewelina Lipiec and Christian Adam

Applied Spectroscopy, Vol.69(10), pp.1210-1214

2015

DOI: https://doi.org/10.1366/15-07878

PMID: 26449816

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Abstract

Far-infrared spectroscopy

Far-IR spectroscopy

Chromium

Carbonate

Chromate

Thermal treatment

The chemical state of thermochemically treated chromium(III) oxide (Cr2O3) with various carbonates was analyzed by far-infrared (far-IR) spectroscopy (spectral region 700-25 cm-1). Non-toxic Cr2O3 was oxidized with potassium, sodium, and calcium carbonate, respectively, to toxic Cr(VI) and Cr(V) compounds during thermal treatment at 1000 °C. In reverse, thermochemical treatment of Cr2O3 with magnesium carbonate lead to the formation of the Cr(III) compound MgCr2O4. Higher temperatures (>1200 °C) or reducing atmospheric conditions prevent the formation of Cr(VI)/Cr(V) compounds, too. Additionally, it was found that polyethylene powder with a low particle size (<70 μm) is favorable for the collection of good far-IR spectra of inorganic powders.

Details

Title: Thermal treatment of chromium(III) oxide with carbonates analyzed by far-infrared spectroscopy
Authors: Christian Vogel (Author) - Federal Institute For Materials Research and Testing
Jan Stemann (Author) - Federal Institute For Materials Research and Testing
Karsten Holldack (Author) - Helmholtz-Zentrum Berlin
Ryo Sekine (Author) - University of South Australia
Ewelina Lipiec (Author) - Polish Academy of Sciences
Christian Adam (Author) - Federal Institute For Materials Research and Testing
Publication details: Applied Spectroscopy, Vol.69(10), pp.1210-1214
Publisher: Sage Publications Inc.
Date published: 2015
DOI: 10.1366/15-07878
ISSN: 0003-7028; 1943-3530; 0003-7028
PMID: 26449816
Organisation Unit: University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99513873802621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Instruments & Instrumentation; Spectroscopy

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