Sintsov S. V.
1, Chekmarev N. V.1, Rybakov K.I.
1, Sorokin A. A.1, Preobrazhensky E. I.
1, Vodopyanov A. V.
1
1Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia
Email: sins@ipfran.ru
This paper presents the results of a study of the solid-phase synthesis of barium titanate using continuous microwave radiation from a 24 GHz process gyrotron in a multimode reactor. It is demonstrated that in localized regions of small-scale superheated instabilities initiated by millimeter-wave radiation in the initial stoichiometric reaction mixture of ultrafine barium carbonate and titanium dioxide powders of bulk density, the synthesis process can proceed in 5-7 minutes, ensuring a target product yield of 90 %. A realistic numerical model of a multimode reactor developed, based on an iterative solution of Maxwell's steady-state equations and thermal conductivity, shows that the specific energy input in the regions of small-scale superheated instabilities can reach 670 W/cm3 with an input power of 400 W. Keywords: barium titanate, chemical synthesis, gyrotron, computer modeling.
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