Preparation of nanodisperse solid solutions based on ZrO2 and HfO2 from hydroperoxides

A procedure for preparing solid solutions based on zirconium and hafnium hydroperoxides is developed. This procedure is based on the coprecipitation of components in the presence of hydrogen peroxide. Amorphous nanopowders (S _sp = 80–90 m²/g, d _mean = 2–3 nm) without any indication of the agglomeration of particles are synthesized. After the decomposition of complex hydroperoxides at a temperature of 500°C, the compacted powders undergo an active sintering at a temperature of 1450°C. The particle size after heat treatment does not exceed 50 nm. As follows from the electrical and physical characteristics obtained for these materials, they can be recommended for the use as solid electrolytes and sensors of oxygen partial pressure.