Microwave Heating of Metallic Powders
It is known from experimental data that bulk metallic samples reflect microwaves while powdered samples can absorb such radiation and be heated efficiently. In the present paper we investigate theoretically the mechanisms of penetration of microwave radiation through a layer of metallic powder and microwave heating of such system.
V. D. Buchelnikov et al., "Microwave Heating of Metallic Powders", Solid State Phenomena, Vols. 152-153, pp. 385-388, 2009