Metal oxide modified multilayer oxide ceramic as well as preparation method and application thereof

The invention relates to a metal oxide modified multilayer oxide ceramic and a preparation method and application thereof, and the preparation method comprises the following steps: based on the total weight ratio of Y2O3, lanthanide oxides and other coloring element oxides in each layer of raw material oxide powder, selecting at least one layer of oxide powder, adding Al2O3, and uniformly mixing; the preparation method comprises the following steps: by taking the selected nth layer and the layer with the smallest Y2O3 weight ratio in the two adjacent layers as a comparison layer, quickly determining the addition amount of aluminum oxide in powder of each layer according to a formula m (Al2O3) = mmin (Al2O3) + a * delta m (Y2O3) + b * delta m (La)-c * delta m (O), a being 0.01-0.05, b being 0.02-0.1 and c being 0.01-0.04, adding according to a calculation result, and preparing the multilayer oxide ceramic which is not easy to deform after being pre-sintered, and has the characteristics of low cost and high eff