Hydrothermal synthesis of ZrO 2 and its composites

Abstract

A series of hydrous zirconia samples were prepared by hydrothermal method and investigated. It was observed that developed hydrothermal technique of water suspensions of zirconium and aluminum hydroxide allows producing of nanoparticles of zirconia, alumina and its compositions with specific surface area (SSA) in the range of 50-96 m 2/g. However, the step of additional treatment after hydrothermal synthesis is necessary to obtain the higher values of SSA. Besides, the presence of alumina in zirconia compositions increases the SSA with δ-Al 2O 3 phase formation, but in the range of low temperatures the presence of the ortorombic boehmite phase has been shown.