It has a complete cubic crystal structure, a small particle size and a high specific surface area. It is surface treated with a special activator and coupling agent, It has good compatibility with resins and good dispersibility. It can greatly improve the transparency, tensile strength and heat resistance of products. It can replace nano barium sulfate in plastic transparent tilms, and its film area is 1.5 times that of nano barium sulfate. It can also be used for wire drawing, injection molding, PVC, PE, PP and other profiles, pipes, plates, etc, as a reinforcing agent.