The technical scheme of the present invention is as follows: the tetragonal zirconia polycrystalline powder is prepared from the following two raw materials by mole percentages. Fully stabilized zirconia powder = 20 60% 40 80%; wherein the tetragonal zirconia polycrystalline powder contains yttrium oxide The molar percentage of yttrium oxide is 3%; the molar percentage of yttrium oxide in the fully stabilized zirconia powder is 8%.
The preparation process of the present invention includes the following steps: firstly weigh the tetragonal zirconia polycrystalline powder and the fully stabilized zirconia powder according to the above-mentioned mole percentage, and combine the weighed tetragonal zirconia polycrystalline powder and the fully stabilized zirconia powder Pour the mixture into a mortar, grind and mix thoroughly, use isostatic pressing to form, press the mixed powder into a ceramic block under a pressure of 100MPa, pre-sinter the ceramic block, and then process and pre-sinter as needed The latter block is finally put into a box-type high-temperature resistance furnace for sintering to obtain a finished product.
