Performance evaluation of graphite thin slabs for induction heating domestic applications

The inductive characteristics of graphite thin slabs are investigated with the objective of designing convenient loads for domestic induction heating uses. For this purposes it is defined a figure of merit consisting of the increment of the resistance of a loaded planar coil with respect to the resistance of the coil in the air. The equivalent resistance of the coupled coil-slab system is obtained by means of analytical calculations which are compared to resistance measurements. Performance of graphite slabs of different thicknesses and a ferromagnetic conventional material are compared.