I am trying to apply a strong electric field to a porous material by applying a strong voltage across two conductive parallel plates that are sandwiching the material. Goal is to align dipoles in the material. I can't achieve high enough field strength due to dielectric breakdown of air in the material's pores, so I am experimenting with coating the material in oil. This does allow a stronger electric field to be applied, but will my material still see this strong electric field or will the presence of the dielectric fluid work against the electric field's strength?
Another way to ask this question might be - can a parallel plate capacitor with dielectrics in series be treated as individual parallel plate capacitors in series, where my material still sees the applied electric field rather than the effective electric field once the polarization field of the dielectric is subtracted out?
I've been working through equations and happy to share quantitative reasoning so far as well unless someone has a quick answer to this.