Yttria-stabilized tetragonal polycrystalline zirconium oxide composite ceramic material containing aluminum oxide and strontium aluminate as well as preparation method and application of yttrium-stabilized tetragonal polycrystalline zirconium oxide composite ceramic material

The invention relates to the technical field of composite ceramic materials, in particular to a yttria-stabilized tetragonal polycrystalline zirconia composite ceramic material containing aluminum oxide and strontium aluminate as well as a preparation method and application of the yttria-stabilized tetragonal polycrystalline zirconia composite ceramic material. According to the scheme, the composite ceramic material comprises a first phase containing ZrO2, a second phase containing Al2O3 and a third phase containing SrAl12O19, the first phase contains 3-5 mol% of Y2O3, Al2O3 and SrAl12O19, and the concentrations of the Y2O3, the Al2O3 and the SrAl12O19 in the composite ceramic material are all 3-10 vol%. According to the technical scheme, the yttrium oxide-stabilized tetragonal polycrystalline zirconia composite ceramic material containing aluminum oxide and strontium aluminate is prepared through a one-pot sol-gel method, uniform doping of molecules is achieved, and the composite material with excellent frac