Comparative Study of Luminophores in the System ZrO2–Y2O3–Eu2O3 Obtained by Wet Mixing and Coprecipitation Followed by Microwave Treatment

It is shown that the high-temperature (1100°C) microwave treatment of the ZrO2–Y2O3–Eu2O3 luminophores obtained by wet mixing using zirconium oxochloride and yttrium acetate leads to a significant growth in the luminescence brightness that exceeds that of an industrial luminophore based on Y2O3 : Eu3+ by a factor of 1.75. For a luminophore with the identical composition obtained by the coprecipitation of hydroxides from a solution of the corresponding nitrates, a similar microwave thermal treatment leads to a sharp decrease in the brightness. The observed differences in the characteristics of the synthesized luminophores are compared to the changes in the functional composition of their surface and dispersity as a result of the microwave treatment.