The sea blue zirconia product is made by sintering nano zirconia powder at extremely low temperature (1350 ºC) (sintering density is greater than 6.2g/cm ³) The nano zirconia material has the advantages of ultra-high performance when stamping copper: 1. Very high wear resistance, its wear is more than 3.5 times that of superhard materials under the same use environment; 2. The nano zirconia has fine and uniform micro grains, high bending strength and excellent fracture toughness, and its mechanical properties are basically Twice as much as conventional zirconia; 3. There is no material adhesion. Due to the unique non wetting property of the nano ceramic with the metal, there is no adhesion with the copper during the stamping process; 4. It can withstand extremely high operating temperature, and its operating temperature reaches above 1200 ° C, still showing strong stability. More importantly, The material has very good thermal shock resistance.