Grinding media is made of nano zirconium powder with the most advanced isocratic technology with low wear rate. They are with high density, high strength and toughness, high hardness, high temperature, rust-resistance, wear-resistance etc.They are mainly used for ultrafine powder processing with grinding and dispersing in light industry, chemical, food processing and pharmaceutical fields. They can grind high purity materials, such as aluminum oxide powder, zirconium silicate powder, medical, food, calcium carbonate, kaolin powder, paint, ink, electronic-ceramic powders etc., without polluting materials and environment, thus can effectively keep the purity of materials.