Electric field induced permittivity increase of carbon particle aggregates/silicone oil suspension

Functional Materials and Nanotechnologies 2018

Ozols, K.^1 ; Scegoleva, S.^1 ; Knite, M.^1

Institute of Technical Physics, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena 3/7, Riga

LV-1048, Latvia^1

关键词: Carbon particle;    Direct current electric fields;    Electric field induced;    Field strengths;    Oil suspensions;    Percolation thresholds;    Three orders of magnitude;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/503/1/012012/pdf
DOI  :  10.1088/1757-899X/503/1/012012

来源: IOP

【 摘 要 】

Permittivity percolation threshold of carbon particle aggregates/silicone oil (CPA/SO) suspension was determined (Φc = 2.6 wt%). A direct current electric field induced permittivity increase versus time for the suspension containing 0.2 wt% of the CPA was measured at different field strengths. It was found that the electric field at 200 V/cm increases the permittivity of the CPA/SO suspension (' = 3.2 at 1 kHz) by three orders of magnitude in 30 min. At 800V/cm the same permittivity increase was reached in 1.5 min.