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In this study, the effect of 2.0, respectively 5.0
weight percent filler of halloysite (HNT) dopant for dielectric
properties of two two-component polyurethane potting agent
were studied. In this study, polyurethane-based potting
compounds from VUKI a.s. were used as the base medium, one
being a pure potting compound with the factory name VUKOL
N22 and the second potting compound having the designation
VUKOL N22u Magna Blue. For this purpose, direct volume
resistivity measurements and broadband dielectric
spectroscopy measurements were used to describe changes in
the dielectric responses of the studied nanocomposites doped
with HNT. The investigation of the dependence of complex
relative permittivity and dissipation factor was conducted using
dielectric frequency spectroscopy within a temperature range of
25 °C to 120 °C and a frequency range of 1 mHz to 1 MHz. The
measurements of resistance were carried out following the
standard STN 34 6460: 1993, with the ambient temperature
consistently maintained at 25°C.
