... IV is made by mono-crystal nanometer diamond and DP V is poly-crystal nanometer diamond.Using DP IV can minimize a ... following advantage factors: distributed well of diamond particle in suspension, liquid PH around 7, stable polishing quality, saving over 50% polishing ... polish various hard and brittle materials,such asSiC,Al2O3,Si,SiO2,CaF2,BeF2,Li3AlO3,Li3GaO3,Tb3GaO12,GeO2,Si3N4,ZrO2,BK7 glsss ...