Аннотации:
This paper presents the results of ceramic synthesis in the field of a powerful flux of
high-energy electrons on powder mixtures. The synthesis is carried out via the direct exposure
of the radiation flux to a mixture with high speed (up to 10 g/s) and efficiency without the use
of any methods or means for stimulation. These synthesis qualities provide the opportunity to
optimize compositions and conditions in a short time while maintaining the purity of the ceramics.
The possibility of synthesizing ceramics from powders of metal oxides and fluorides (MgF2
, BaF2
,
WO3
, Ga2O3
, Al2O3
, Y2O3
, ZrO2
, MgO) and complex compounds from their stoichiometric mixtures
(Y3Al3O12, Y3AlxGa(5−x) O12, MgAl2O4
, ZnAl2O4
, MgWO4
, ZnWO4
, BaxMg(2−x) F4
), including
activators, is demonstrated. The ceramics synthesized in the field of high-energy electron flux have a
structure and luminescence properties similar to those obtained by other methods, such as thermal
methods. The results of studying the processes of energy transfer of the electron beam mixture,
quantitative assessments of the distribution of absorbed energy, and the dissipation of this energy are
presented. The optimal conditions for beam treatment of the mixture during synthesis are determined.
It is shown that the efficiency of radiation synthesis of ceramics depends on the particle dispersion of
the initial powders. Powders with particle sizes of 1–10 µm, uniform for the synthesis of ceramics of
complex compositions, are optimal. A hypothesis is put forward that ionization processes, resulting
in the radiolysis of particles and the exchange of elements in the ion–electron plasma, dominate in
the formation of new structural phases during radiation synthesis.
