Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

In situ solid state electrochemical impedance spectroscopy of NiO scales

Liu, H. and Mojica-Calderon, C and Lyon, S.B. and Stack, M.M. (1999) In situ solid state electrochemical impedance spectroscopy of NiO scales. Solid State Ionics, 126 (3-4). pp. 363-372. ISSN 0167-2738

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

NiO scales thermally grown on pure nickel were characterised by in situ solid state electrochemical impedance spectroscopy (EIS). Possible sources of error including the amplitude of the applied sine wave signals, the input impedance of FRA, as well as the residence time at the measuring temperature were examined. Specimens oxidised in air for 6, 24 and 120 h at 800 degrees C respectively were characterised over the temperature range 150-700 degrees C. The results suggest that only one time constant charge transport process is dominant in the NiO scales. The temperature dependence of the electrical conductivity shows an activation energy of about 0.6 eV which is consistent with measurements on hulk NiO pellets. The capacitance and dielectric constants of NiO scales also show a strong dependence of temperature.

Item type: Article
ID code: 34374
Keywords: NiO scale, electrochemical impedance spectroscopy (EIS), electrical conductivity, activation energy, dielectric constant, crystalline nickel oxide, CR2O3 scales, diffusion, conductivity, Mechanical engineering and machinery, Chemical engineering, Materials Science(all), Chemistry(all), Condensed Matter Physics
Subjects: Technology > Mechanical engineering and machinery
Technology > Chemical engineering
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 17 Oct 2011 14:04
    Last modified: 05 Sep 2014 11:53
    URI: http://strathprints.strath.ac.uk/id/eprint/34374

    Actions (login required)

    View Item