Toughening of zirconia ceramic liner. Ceramic liner materials are used the most advanced new materials toughened zirconia, the fracture toughness value of K 10-15MPa (traditional ceramics about 10 times), flexural strength σ 600-800Mpa, Weber coefficient m18 , elastic modulus E200Gpa, wear resistance, excellent corrosion resistance, the site has over 3000 hours service life. With tightly controlled process parameters and the firing system, specifications can be made of many large-sized bell one ceramic cylinder, and its performance has exceeded the import target of the ceramic cylinder, are currently the only successfully developed and actually used by the users proved to have practical Value of integrated drilling pump ceramic liner. Country has applied for four patents for inventions