Abstract:
YAG:Ce ceramics by the direct action of an electron beam with 1.4 MeV energy were
synthesized on a mixture of a stoichiometric composition of Y, Al, and Ce oxides without adding
any substances to facilitate the process. The synthesis is realized in a time less than 1 s. The main
structural phase of the obtained ceramics is YAG and YAP can be additional. The luminescence
characteristics of the synthesized samples, the excitation, luminescence, decay time, and pulsed
cathodoluminescence spectra, are similar to those known for YAG:Ce phosphors. The conversion
efficiency of the excitation energy into the luminescence of the samples reaches 60–70% of those used
for the manufacture of LED phosphors. The set of processes that determine the rate and efficiency
of radiation synthesis differs from those occurring during thermal methods by the existence of a
high degree of the initial compositions’ ionization under the influence of a radiation flux and a high
probability of the decay of electronic excitations into short-lived radiolysis products.
