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Effect of gas atmosphere on carbothermal reduction and nitridation of titanium dioxide

Journal Article


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Abstract


  • This article examined the reduction/nitridation of rutile in the He-N2, Ar-N2, and He (Ar)-H2-

    N2 gas mixtures, as well as pure nitrogen, in the temperature-programmed and isothermal

    experiments in a fixed-bed reactor. The extents of reduction and nitridation were determined

    from the off gas composition and LECO analysis. The off-gas composition was monitored using

    the infrared sensor (CO, CO2, and CH4) and dew point analyzer (H2O). The phase composition

    of the reduced samples was analyzed using X-ray diffraction (XRD). The temperature and gas

    composition had a strong effect on the rutile reduction. The reduction was the fastest in the H2-

    N2 gas mixture, followed by a reduction in nitrogen; the rate of reduction/nitridation in the He-

    N2 gas mixture was marginally higher than in the Ar-N2 gas. The rate of titania reduction/

    nitridation in the He (Ar)-H2-N2 gas increased with the replacement of He (Ar) with hydrogen.

    The article also discusses the mechanisms of reduction/nitridation in different gas atmospheres.

Authors


  •   Rezan, Sheikh A. (external author)
  •   Zhang, Guangqing
  •   Ostrovski, Oleg (external author)

Publication Date


  • 2012

Citation


  • Rezan, S. A., Zhang, G. & Ostrovski, O. (2012). Effect of gas atmosphere on carbothermal reduction and nitridation of titanium dioxide. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, 43 (1), 73-81.

Scopus Eid


  • 2-s2.0-84859061392

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7343&context=engpapers&unstamped=1

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4411

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 73

End Page


  • 81

Volume


  • 43

Issue


  • 1

Place Of Publication


  • United States

Abstract


  • This article examined the reduction/nitridation of rutile in the He-N2, Ar-N2, and He (Ar)-H2-

    N2 gas mixtures, as well as pure nitrogen, in the temperature-programmed and isothermal

    experiments in a fixed-bed reactor. The extents of reduction and nitridation were determined

    from the off gas composition and LECO analysis. The off-gas composition was monitored using

    the infrared sensor (CO, CO2, and CH4) and dew point analyzer (H2O). The phase composition

    of the reduced samples was analyzed using X-ray diffraction (XRD). The temperature and gas

    composition had a strong effect on the rutile reduction. The reduction was the fastest in the H2-

    N2 gas mixture, followed by a reduction in nitrogen; the rate of reduction/nitridation in the He-

    N2 gas mixture was marginally higher than in the Ar-N2 gas. The rate of titania reduction/

    nitridation in the He (Ar)-H2-N2 gas increased with the replacement of He (Ar) with hydrogen.

    The article also discusses the mechanisms of reduction/nitridation in different gas atmospheres.

Authors


  •   Rezan, Sheikh A. (external author)
  •   Zhang, Guangqing
  •   Ostrovski, Oleg (external author)

Publication Date


  • 2012

Citation


  • Rezan, S. A., Zhang, G. & Ostrovski, O. (2012). Effect of gas atmosphere on carbothermal reduction and nitridation of titanium dioxide. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, 43 (1), 73-81.

Scopus Eid


  • 2-s2.0-84859061392

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7343&context=engpapers&unstamped=1

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4411

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 73

End Page


  • 81

Volume


  • 43

Issue


  • 1

Place Of Publication


  • United States