Wear-resistant ceramics have so many advantages such as high density, high hardness, high temperature resistance, corrosion resistance, impact resistance, strong erosion, not falling off, not crack etc. It also can resist corrosion of various medias. With high, pure, ultra aluminum oxide and zirconium oxide as the main raw material, a small amount of chemically pure calcium carbonate, and high, pure rare earth oxides as raw materials, sintering at, 1700℃ high temperature, with occurrenceof physical - chemical reaction, finally forms a kind of ceramic with microstructure of mullite and corundum crystalline phase. This technique solves the serious wear drawbacks of the industrial equipments in electricity , metallurgy, port terminals. Presently, some available ceramic knife in the market is processed with a Nano-material " zirconia". Under 2000℃ high temperature , pressing zirconia powder heavilywith a weight of 300 tons, coupled with mould, then the knife mold is formed.Polishing the knife mold with diamond and coupling with a handle, a finished ceramic knife comes out with so many features, such as high hardness, high density, high temperature, anti-magnetic and anti-oxidation.