... select the product by their sizes, pores and porosity, or if necessary, add molybdenum, nickel and cobalt or other active components ... 80Thermal shocking resistance, (T)800800800Crushing strength, N100-12000Deferent upon types and sizes.Bulk density ,kg/m31200-1500 Porous ceramic balls are ... 20,Φ25,Φ30,Φ38,Φ50 and Φ75. The products in other grade and sizes can be designed and manufactured if to the ...