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<p>In this study, the influence of multiwalled carbon nanotubes (MWCNT) and nanocellulose (CNP) on ferroelectricity, dielectric dispersion and electrical properties of potassium dihydrogen phosphate (KDP) is considered. For comparison, along with the pure KDP, three ferroelectric nanocomposites, including MWCNT/KDP, CNP/KDP and MWCNT/CNP/KDP, were synthesized for measurements. Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR) were used to explore structural changes. The ferroelectricity was studied by analyzing the temperature dependencies of dielectric permittivity and ferroelectric hysteresis loops. The dielectric dispersion and electrical properties were investigated from 1 mHz to 1&#xa0;kHz using the frequency dependencies of dielectric permittivity and electrical conductivity, respectively. The results showed a stronger influence of nanocellulose on the phase transition and polarization switching of KDP, but less impact on the dielectric dispersion and electrical properties, than those of MWCNT. Specifically, the cellulose resulted in an increase in phase transition temperature by 2.1&#xa0;K from 123.2&#xa0;K to 125.3&#xa0;K with the rise of the coercive fields. Meanwhile, the MWCNT part enhanced the dielectric permittivity and electrical conductivity, reduced the activation energy (from 0.69&#xa0;eV to 0.25&#xa0;eV), distorted P-E loops due to leakage current. The influence of cellulose and MWCNT on KDP properties are explained by the cellulose/KDP interaction via hydrogen bonding and the high electrical conductivity, respectively.</p>

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Ferroelectricity, dielectric dispersion and electrical properties of ferroelectric nanocomposites based on potassium dihydrogen phosphate with multiwalled carbon nanotubes and nanocellulose

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Hoai Thuong Nguyen,
  • Phan Thi Bich Thao

摘要

In this study, the influence of multiwalled carbon nanotubes (MWCNT) and nanocellulose (CNP) on ferroelectricity, dielectric dispersion and electrical properties of potassium dihydrogen phosphate (KDP) is considered. For comparison, along with the pure KDP, three ferroelectric nanocomposites, including MWCNT/KDP, CNP/KDP and MWCNT/CNP/KDP, were synthesized for measurements. Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR) were used to explore structural changes. The ferroelectricity was studied by analyzing the temperature dependencies of dielectric permittivity and ferroelectric hysteresis loops. The dielectric dispersion and electrical properties were investigated from 1 mHz to 1 kHz using the frequency dependencies of dielectric permittivity and electrical conductivity, respectively. The results showed a stronger influence of nanocellulose on the phase transition and polarization switching of KDP, but less impact on the dielectric dispersion and electrical properties, than those of MWCNT. Specifically, the cellulose resulted in an increase in phase transition temperature by 2.1 K from 123.2 K to 125.3 K with the rise of the coercive fields. Meanwhile, the MWCNT part enhanced the dielectric permittivity and electrical conductivity, reduced the activation energy (from 0.69 eV to 0.25 eV), distorted P-E loops due to leakage current. The influence of cellulose and MWCNT on KDP properties are explained by the cellulose/KDP interaction via hydrogen bonding and the high electrical conductivity, respectively.