Studies of upconversion emission of Yb3+, Er3+:Lu2O3 nanoceramics

► The translucent Yb3+ and Er3+ doped Lu2O3 ceramics composed of nanocrystalline grains were sintered. ► Significant difference in UC spectra measured for nanocrystalline powder and nanoceramic was found. ► The intensity ratio of the anti stokes transitions allows to determine the temperature of the nanoceramic. ► Measurement of intensity ratio of the UC bands in the nanoceramic may be applied in thermometry.