The invention relates to a zirconia-based all-
ceramic false tooth and a preparation method thereof. A core layer of the zirconia-based all-
ceramic false tooth is prepared from the following components in parts by
mass: 90 to 94 parts of ZrO2, 5 to 9 parts of Y2O3, 0.1 to 0.5 part of Al2O3, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2, and a shell layer of the zirconia-based all-
ceramic false tooth is prepared from the following components in parts by
mass: 24.5 to 49.5 parts of CaCO3, 45 to 50 parts of SiO2, 0 to 25 parts of MgO, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2. The preparation process comprises the following steps: performing
dry pressing and isostatic pressing on raw materials of the core layer, presintering, and
carving to obtain a zirconia-based false tooth biscuit; meanwhile, calcining raw materials of a shell layer, then adding deionized water, a dispersing agent and an
adhesive, and carrying out ball milling and mixing to obtain
calcium-
magnesium-
silicon-based ceramic
slurry; and
coating the
calcium-
magnesium-
silicon-based ceramic
slurry on the surface of the
zirconium oxide-based false tooth biscuit, and
sintering to obtain the
zirconium oxide-based all-ceramic false tooth provided by the invention. The zirconia-based all-ceramic false tooth has good jade texture and is closer to the natural color of natural teeth.