Abstract

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 Cu 2O, TiO 2 rutile from TiO 2 anatase, PbO from Pb 3O 4 and the V 6O 13 and V 2O 5 higher oxides from V 2O 3. Finally, it is possible to turn white powders such as SnO 2, TiO 2 and ν-Al 2O 3 and green powders such as Cr 2O 3 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.

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