The invention belongs to the technical field of
ceramic powder preparation, and particularly relates to a preparation method of high-dispersion nano-zirconia
powder. According to the method, doped
yttrium metal modification, preparation of a precursor by a co-
precipitation method and hydrothermal
crystallization are combined to obtain the high-purity and high-dispersion nano-zirconia
powder,
impurity ions in the precursor are removed by an ultra-
filtration composite membrane technique,
crystal form control and particle dispersion functions of a mineralizer are more effectively achieved in
hydrothermal reaction, the concentration of the nano-zirconia powder in the precursor is improved, and high-purity and high-yield nano-powder is prepared. The nano-zirconia powder with stable
yttrium prepared by the method has a spherical particle shape, is narrow in
particle size distribution, good in dispersibility, high in purity, free from aggregation and the like and can be widely applied to high-end biological
ceramic materials, and the method solves the problem of
brittleness of a current zirconia material in the transition process of
crystal forms, so that zirconia ceramics are flexibly and widely applied.