New developments in the field of energy transfer by means of monomode microwaves for various oxides and hydroxides

Article abstract of DOI:10.1016/0925-8388(94)90086-8

By means of a 'focused' microwave oven (monomode system) it is possible to carry out chemical syntheses within very short times. The use of a new magnetron with higher performance experimental conditions has allowed us to observe phenomena which have not previously been recorded. For instance, it is possible within very short treatment times to form copper metal from Cu₂O, TiO₂ rutile from TiO₂ anatase, PbO from Pb₃O₄ and the V₆O₁₃ and V₂O₅ higher oxides from V₂O₃. Finally, it is possible to turn white powders such as SnO₂, TiO₂ and η-Al₂O₃ and green powders such as Cr₂O₃ incandescent red. Several hypotheses will be put forward to try to explain this phenomenon. The temperature measurement is also discussed as a function of the dielectric constant of the materials.