Granular additive increasing coupling to microwave heating - comprises cobalt oxide, chromium nitrate etc. and is used with materials that are (partly) transparent to microwave radiation (SW 4.12.78)

摘要

An additive is mixed with material to be subjected to microwave heating to increase the coupling or effectiveness of the heating. The additive has a substantially greater coupling factor than that of the material to which it is added. The material is selected from CO3O4, CrN, FeO4, MnO2, NiO, Ni2O3, or a composition resulting from the mixture of Al2O3 and CaO with any water driven off, or a mixt. of these. Both the additive and the subject material should be granular and in the case of the Al2O3, CaO mixture, Al2O3 forms 90% wt. the CaO having an 8-15% water.