The present work developed a methodology for synthesising single-phase nanopowder based on an ordered phase with LaLuO3 perovskite type structure. The LaLu O₃: Yb^3+ nanopowder, doped with 2mol% Yb^3+, was synthesised by wet-chemical method from precursor nitrate solution and thermal treated to form pure perovskite phase. The synthesised nanopowder was comprehensively studied using IR spectroscopy, X-ray diffraction, scanning electron microscopy and adsorption-structural methods. The results of the X-ray diffraction analysis indicate that the synthesised powder is single-phase, with all the formed diffraction peaks corresponding to the ordered structure of the LaLu O₃ perovskite type. The unit cell parameters of the LaLu O₃: Yb^3+ (2mol%) phase are: a = 0. 6023 nm, b = 0. 8385 nm, c = 0. 5822 nm and V = 0. 294 nm3 whereas the average crystallite size is 51. 2 nm. The nanopowder was consolidated using the spark plasma sintering (SPS) technique at 1380°C and 50MPa with dwell of 15min, resulting in a fully dense ceramic material of 8. 16 g/ cm^3 (i. e. 99. 54% theoretical density).
Korniienko et al. (Thu,) studied this question.