... of ZrO increases.3. Only no harder than Boron carbide and Diamond, friable, its girt is sharp, and ... Thermal conductivity4 Suitable for grinding Hard alloy, Optical glass, vitrify, gem, agate, ... to help with you to develop new-style abrasive tools, and to tackle a key problem7.Wheel should ... abrasive material, grain, grade, , and speed grinding wheel for woodworking tools