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<p>Neodymium oxide (Nd<sub>2</sub>O<sub>3</sub>) embedded in polypyrrole (PPy) with varying compositions were synthesized using the chemical polymerization technique. PPy and PPy/Nd<sub>2</sub>O<sub>3</sub> composites were employed to the several characterization techniques including scanning electron microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) studies. Room temperature AC conductivity studies were carried out in the frequency range 50&#xa0;Hz to 5&#xa0;MHz. PPy/Nd<sub>2</sub>O<sub>3</sub>-10 wt% composite exhibited highest conductivity of 2.69 × 10<sup>−</sup>² Scm<sup>− 1</sup> among all the composites and an increase of two orders compared to PPy, which is noteworthy. Cole-Cole plots for the composites exhibited a non-Debye type relaxation. Interestingly, dielectric constant of PPy/Nd<sub>2</sub>O<sub>3</sub>-10 wt% composite in the frequency range 1–100&#xa0;kHz was found to be high ≈ 1000. Also, the low frequency relaxation peaks, low dielectric loss of the composites makes them potential candidates in the design of low frequency operating devices.</p>

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Characterization of Polypyrrole Based Novel High Dielectric Materials for Low Frequency Applications

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • L. B. Gunjal,
  • S. Manjunatha,
  • CH. V. V. Ramana,
  • P. N. Ravi Shankar,
  • H. L. Pushpalatha,
  • Y. T. Ravikiran,
  • N. M. Nagabhushana

摘要

Neodymium oxide (Nd2O3) embedded in polypyrrole (PPy) with varying compositions were synthesized using the chemical polymerization technique. PPy and PPy/Nd2O3 composites were employed to the several characterization techniques including scanning electron microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) studies. Room temperature AC conductivity studies were carried out in the frequency range 50 Hz to 5 MHz. PPy/Nd2O3-10 wt% composite exhibited highest conductivity of 2.69 × 10−² Scm− 1 among all the composites and an increase of two orders compared to PPy, which is noteworthy. Cole-Cole plots for the composites exhibited a non-Debye type relaxation. Interestingly, dielectric constant of PPy/Nd2O3-10 wt% composite in the frequency range 1–100 kHz was found to be high ≈ 1000. Also, the low frequency relaxation peaks, low dielectric loss of the composites makes them potential candidates in the design of low frequency operating devices.