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.

中文翻译：

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低聚二异氰酸酯和钛酸钡复合材料的介电性能

摘要

合成了多种基于低聚二异氰酸酯的复合材料，其中铁电填料钛酸钡（BaTiO ₃）亚微米颗粒含量不同。所得复合材料的介电特性对填料含量的依赖性的极值_行为含量为 30 vol%。通过共聚焦显微镜对复合材料层形貌的研究表明，观察到的介电性能对成分的依赖性与复合材料结构随渗流的变化、单个无限簇的形成以及基体岛结构和某些临界浓度的链类型。