MECHANOCHEMICAL SYNTHESIS AND INVESTIGATION OF THE PROPERTIES OF DY2TIO5 SINGLE-PHASE CRYSTALLIMNE NANOPOWDERS
The goal of this work was to synthesize and investigate the mono-phase crystalline nanopowders of dysprotium titanate Dy2TiO5 as well as sintered specimens.Nanopowders of crystalline disporium titanate were produced by mechanochemically synthesized using the anatase and dysprosium oxide as the initial reagents. Mechanochemical synthesis duration was equal to 180 min. Synthesized Dy2TiO5 nanopowders were of a high-temperature cubic modification. Particles size of mechanochemically synthesized Dy2TiO5 was equal to 20-30 nm.Properties of the synthesized nanopowders and sintered bulk materials were investigated. Commercial Dy2TiO5 powders produced by the melting of the oxides were used for comparison. In the case of mechanochemically synthesized nanopowders, decomposition of Dy2TiO5 and formation of metastable DyTiO3 was detected during the sintering, which contradicts to the classic phase diagram for the system. In the case of commercial Dy2TiO5 powders, no phase decomposition was observed.