The invention provides a preparation method of
zirconium oxide microspheres for
polishing, which comprises the following steps: preparing
slurry A containing N, N '-
methylene bisacrylamide,
acrylamide and a dispersing agent, mixing 3Y-ZrO2
powder and the
slurry A, performing ball milling, and adding a defoaming agent and an initiator to obtain
slurry B; adding the slurry B into the
oil phase C for mixing to obtain a pre-
emulsion D, adding the pre-
emulsion D into an emulsifying device, starting cooling and stirring, enabling the pre-
emulsion to pass through an aluminum
oxide film under
nitrogen pressure, obtaining emulsion liquid drops under the action of magnetic stirring, enabling the liquid drops to be in curing liquid to obtain a
microsphere precursor, then starting a catalyst adding pump, and carrying out
solid-liquid separation to obtain the catalyst. Carrying out low-temperature pre-
sintering and high-temperature
sintering on the biscuit, so as to obtain the
zirconium oxide microspheres of 30-50 microns. The method disclosed by the invention is relatively simple to operate, and the zirconia microspheres have a great application space in the fields of
grinding and dispersing of high-added-value ceramics with very high product purity requirements,
biochemistry, medical industry and the like.