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Electrical and thermal properties of ammonium and potassium oxalates

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Abstract

The d.c. electrical conductivity (Σ) and the relative permittivity (ɛ) were accurately measured as a function of temperature in the range 300 < T < 450 K for ammonium oxalate monohydrate (AOX), (NH4)2 C2O4H2O and potassium oxalate monohydrate (POX), K2C2O4H2O. Differential thermal analysis (DTA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) from 300 K up to 520 K were also performed for each compound. The data of the electrical parameters combined with the DTA and/or DSC thermograms suggest the existence of a possible change in the electrical conduction at 350 K for AOX and at 355 K for POX. Like most hydrogen-bonded molecules, the charge carriers may be protons and the electrical conduction is therefore protonic. At somewhat higher temperatures, dehydration and/or decomposition takes place in each compound and is reflected as a sudden loss in weight in the TGA plot.

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Authors and Affiliations

  1. Physics Department Faculty of Education, Kafr El-Shiekh, Egypt

    M. M. Mosaad

  2. Physics Department Faculty of Science, Zagazig, University Benha, Egypt

    A. El-Shawarby

  3. Physics Department Faculty of Science, Azhar University, Egypt

    Z. H. El-Tanahy

  4. Physics Department Faculty of Science, Cairo University, Egypt

    M. M. Abdel-Kader

Authors
  1. M. M. Mosaad
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  2. A. El-Shawarby
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  3. Z. H. El-Tanahy
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  4. M. M. Abdel-Kader
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Mosaad, M.M., El-Shawarby, A., El-Tanahy, Z.H. et al. Electrical and thermal properties of ammonium and potassium oxalates. J Mater Sci: Mater Electron 6, 235–239 (1995). https://doi.org/10.1007/BF00187203

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  • DOI: https://doi.org/10.1007/BF00187203

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