The content of zirconia in zirconia ceramics is related to the temperature suitable for sintering. The higher the content of zirconia, the higher the sintering temperature. The calcination temperature of zirconia is related to particle size. It is related to adding stabilizer. Nano scale can be fired at about 1300 degrees, and the sintering temperature at micron level needs 1500-1600 degrees. The sintering temperature of zirconia ceramics should be determined according to the powder. The sintering temperature in China is about 1600 C, and the import is determined according to the manufacturer's instruction.