Abstract
A number of composites based on oligomeric diisocyanate with different content of submicrometer particles of ferroelectric filler barium titanate (BaTiO3) are synthesized. Extremum behavior of the dependence of the dielectric characteristics of the obtained composites on the content of the filler with a sharp m-inimum of the dielectric permittivity and a maximum of the dielectric loss tangent at a BaTiO3 content of 30 vol % is established. A study of the morphology of composite layers by confocal microscopy showed that the observed dependences of their dielectric properties on composition are associated with changes in the structure of composites with percolation, and the formation of a single infinite cluster and structures of the matrix–island and chain types at certain critical concentrations.
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This study was performed at the Institute of Analytical Instrumentation, Russian Academy of Sciences, within State assignment no. 0074-2019-0013.
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Myakin, S.V., Bubis, N.A., Kuznetsov, L.M. et al. Dielectric Properties of Composites Based on Oligomeric Diisocyanate and Barium Titanate. Phys. Solid State 64, 157–160 (2022). https://doi.org/10.1134/S1063783422040023
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DOI: https://doi.org/10.1134/S1063783422040023