... , using tantalum powder, pressed into a pellet shape, as one "plate" of the capacitor, the oxide as the dielectric, and an electrolytic ... solution or conductive solid as the other "plate". Because the dielectric layer can be very thin (thinner than ... available in a wide range of forms including nut, screw ,ring ,wire, foil, sheet, rod, strip, plate, tube, alloys according to ...