With the advent of the 5G era, zirconia ceramics have become the new favorite material for mobile phone backplanes. By the end of 2018, 154 mobile operators around the world are conducting 5G technology testing or testing, and the number of countr…

Ceramic ball bearings have been successfully applied in the industrial field. More applications are silicon nitride ceramic ball bearings. It has the advantages of high limit rotation speed, good precision retention, small starting torque, hig…