STUDY OF THE EFFECT OF ZCO CERAMIC PHASE COMPOSITION ON OPTICAL AND THERMOPHYSICAL PROPERTIES

The work is devoted to the study of optical and thermophysical properties promising materials for nuclear power a new generation - inert matrices dispersed fuel based on ZrO2 – CeO2 (ZCO) doped with Y2O3. Interest in this class due great prospects field replacing traditional type uranium-free fuel, which technological solution using plutonium as fissile element, placed matrix oxide or nitride ceramics. purpose effect doping ZCO ceramics Y2O3 heat-conducting properties. During study, it was found that an increase concentration dopant leads formation highly ordered CeZrO4 phase, presence appearance additional absorption band region 550 650 nm, well decrease transmission value 400 700 nm. To evaluate results obtained, methods UV spectroscopy heat flux determination were applied. It has been spectral lines, shift gap low energies. analysis parameters, change phase composition thermal conductivity coefficient by more than 40 60 %.