Used as pigment of paint and filler of rubber. In medicine, it is used to make ointment, zinc paste, rubber paste and other dental materials, namely clove oil zinc oxide cement. Clove oil zinc oxide cement powder: also called temporary cement powder, clove oxygen paste. It can be used as the bottom layer non bearing material for deep hole double-layer backing, or as the single layer non bearing material for temporary sealing of cavities for 1 to 2 weeks, and also as root canal filling material. Excipients can be added as periodontal treatment agent. Doctors often use zinc oxide as the abbreviation of clove oil zinc oxide cement. The calamine lotion used to treat acute itchy skin diseases usually also contains zinc oxide, which uses the astringent and protective effects of zinc oxide, as well as a small part of the antiseptic effect. Zinc oxide is an indispensable additive in the rubber and tire industry, and is also used as a vulcanizing active agent, reinforcing agent and colorant for natural rubber, synthetic rubber and latex. If ordinary zinc oxide is made into nano zinc oxide and used in rubber, it can give full play to the role of vulcanization promotion and improve the performance of rubber. The amount of nano zinc oxide is only 30%~50% of ordinary zinc oxide. In the chemical industry, zinc oxide is widely used as catalyst and desulfurizer, such as catalyst for methanol synthesis and desulfurizer for ammonia synthesis; The high surface activity of nano zinc oxide can improve the selectivity and catalytic efficiency of the catalyst, which has a wide potential application market. In the coating industry, zinc oxide is not only a colouring agent and hiding agent, but also a preservative and luminescent agent in coatings; In addition, the excellent UV shielding ability of nano zinc oxide makes it more prominent in the anti-aging properties of coatings. In the medicine, health and food industry, zinc oxide has the functions of detoxification, hemostasis, muscle growth and astringency. It is also used as the raw material of ointment, and is helpful to promote children's intellectual development; The demand for nano zinc oxide used in the food hygiene industry is gradually expanding, but the product requirements are also relatively strict, especially the content of harmful heavy metals. In the glass industry, zinc oxide is used in special glass products; In the ceramic industry, zinc oxide is used as a flux; In the printing and dyeing industry, zinc oxide is used as an anti dye agent; Nano zinc oxide can reduce the sintering temperature of glass and ceramics due to its fine particles and high activity. In addition, the ceramic glaze prepared by nano zinc oxide is more smooth and clean, and has antibacterial, anti enzyme, deodorant and other effects. In the electronic industry, zinc oxide is not only the main raw material of varistor, but also the main additive of magnetic, optical and other materials. Using nano zinc oxide to prepare varistors not only has a lower sintering temperature, but also improves the varistors' performance, such as flow capacity, nonlinear coefficient, etc. The application of nano zinc oxide in optical devices will make a big breakthrough with the in-depth study of the optical properties of nano zinc oxide.