Preparation method of heat-insulating radiation material prepared from zirconium oxide polishing powder waste

The invention provides a preparation method of a heat-insulating radiation material prepared from zirconium oxide polishing powder waste. The preparation method comprises the following steps: sieving the zirconium oxide polishing powder waste, drying the sieved zirconium oxide polishing powder waste and rare earth carbonate, and mixing the dried zirconium oxide polishing powder waste and rare earth carbonate to obtain precursor powder; the precursor powder is fired, and after heat preservation, (La < 0.5 + x > Sm < 0.5-x >) < 2 > (Zr < 0.7 > Ce < 0.3 >) 2O7 powder of a pyrochlore structure is obtained, and x =-0.5, 0 or 0.5; dissolving a dispersing agent in water, fully mixing, adding the powder, stirring, and grinding to obtain slurry after grinding; and mixing and stirring the slurry and an adhesive solution to prepare the heat-insulating radiation material. According to the heat-insulating radiation material prepared by utilizing the zirconium oxide polishing powder waste, the zirconium oxide polishing pow