Space Charge and Conduction Current in Laminate Elastomer Sheets with Different Laminating Directions

抄録

DC conduction current and space charge characteristics of laminate elastomer sheets with different laminating directions are investigated. Samples (N,V, H) were prepared as 3 types of the laminate elastomer sheets with different laminating directions using stereolithographic 3D printer. Sample N has no lamination. Sample V has the vertical laminating directions against the sample surface. Sample H has the horizontal laminating direction against sample surface. The sample thickness was around 0.5 mm and the laminating pitch was 0.05mm. The DC conduction current was measured by using current integration meter. Space charge distribution was measured using the pulsed electro-acoustic system. The experiments were carried out at 27°C. The accumulated positive charge amount near anode in sample H was larger than that in V and N. The conductivity was almost field-independent up to around 5kV/mm, but above 5kV/mm it increases with increase of electric field irrespective of difference among samples. It is considered that the conductivity of laminate elastomer sheets is governed by the same basic mechanism and parameter values regardless of space charge accumulation and laminating directions, albeit with slightly different magnitudes.