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Dielectric and thermal properties of nanocomposites based on diisopropylammonium iodide and alumina nanoparticles

Sakhnenko Anna ; Milinskiy Alexey ; Baryshnikov Sergey ; Stukova Elena ; Egorova Irina

St. Petersburg Polytechnical University Journal. Physics and Mathematics, 2023-09, Vol.16 (3) [Periódico revisado por pares]

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Título:
Dielectric and thermal properties of nanocomposites based on diisopropylammonium iodide and alumina nanoparticles
Autor: Sakhnenko Anna ; Milinskiy Alexey ; Baryshnikov Sergey ; Stukova Elena ; Egorova Irina
Assuntos: alumina ; dipai ; ferroelectric ; nanocomposite ; permittivity ; phase transition
É parte de: St. Petersburg Polytechnical University Journal. Physics and Mathematics, 2023-09, Vol.16 (3)
Descrição: In the paper, nanocomposites based on diisopropylammonium iodide (DIPAI.) and Al2O3 nanoparticles (sized 100 nm) have been synthesized with varying a volume fraction of the latter (0.05, 0.10, 0.20). Temperature dependences of the permittivity and a signal of differential thermal analysis of the samples (in the range of 300 – 400 K) were studied in heating and cooling modes. Their infrared spectra were recorded at room temperature as well. An analysis of the measured temperature dependences indicated a change in the sequence of phase transitions in nanocomposites compared with the pure DIPAI. The totality of the results obtained allowed us to conclude that a change in hydrogen bonds with the participation of amino groups manifested itself in the nanocomposite structure took place. This can lead to the appearance of a ferroelectric state in the DIPAI.
Editor: Peter the Great St.Petersburg Polytechnic University
Idioma: Inglês

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