... a supporting materials to improve the capacity.Comparing to traditional low strength supporting agent, such as quartz sand, glass balls and metal ... strength into 52Mpa (105KN), 69Mpa (140KN), and 86Mpa, (174KN) three series, according to bulk density are divided into: low-density, medium density, high ... DENSITY20MESH-40MESH≤1.65≤3.0052≤8.0>0.8 High strength ceramic proppant