Study of electrical properties and estimation of average mobility and diffusion coefficients in several insulating liquids by dielectric spectroscopy

Xavier Sidambarompoulé (1, 2) , Petru Notingher (1, 2) , Thierry Paillat (3) , Jean-Charles Laurentie (1, 2) , Paul Leblanc (3)

1 IES - Institut d’Electronique et des Systèmes
2 GEM - Groupe énergie et matériaux
3 EFD - Électro-Fluido-Dynamique [Institut Pprime]

Electrical properties of cyclohexane, a pure mineral oil, a mineral oil with additive and a silicon oil are studied in the frequency range of 10 −2-10 5 Hz. The paper reviews theoretical and practical basics for wide range dielectric spectroscopy measurements and puts into focus a method for estimating ionic mobility and diffusion coefficients in insulating liquids via data issued from low frequency spectra. Results obtained at different temperatures are presented and discussed.

Mots clés: Dielectric liquid; diffusion coefficient; mobility; conductivity; electrode polarization; permittivity; spectroscopy

Domaines: Electronique

Xavier Sidambarompoulé, Petru Notingher, Thierry Paillat, Jean-Charles Laurentie, Paul Leblanc. Study of electrical properties and estimation of average mobility and diffusion coefficients in several insulating liquids by dielectric spectroscopy. International Journal of Plasma Environmental Science and Technology, 2020, 14 (3), pp.e03006. ⟨10.34343/ijpest.2020.14.e03006⟩. ⟨hal-03224002⟩