What are the applications of zinc oxide?

2021-05-24

Zinc oxide is an oxide of zinc, insoluble in water but soluble in acids and strong alkalis. It is a white solid, hence also known as zinc white. It can be obtained by burning zinc or roasting sphalerite (zinc sulfide). In nature, zinc oxide is the main component of the mineral zincite.

　　 Zinc oxide Zinc oxide is an oxide of zinc, insoluble in water but soluble in acids and strong alkalis. It is a white solid, hence also known as zinc white. It can be obtained by burning zinc or roasting zinc blende (zinc sulfide). In nature, zinc oxide is the main component of the mineral zincite.


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　　There are two methods for manufacturing artificial zinc oxide: oxidation of pure zinc or roasting zinc ore. Zinc oxide It is used as an additive in a variety of materials and products, including plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, fillers, pigments, food (zinc supplement), batteries, ferrite materials, flame retardant materials, and medical first-aid bandages. Zinc oxide is a wide band gap semiconductor material with a band gap of about 3.3eV at room temperature and an exciton binding energy as high as 60meV. It is expected to replace GaN as a material for ultraviolet light LDs and LEDs. It has important applications in the field of optoelectronics. In high-acid-value adhesives, it will thicken in the container.

　　Zinc oxide is an important and widely used physical sunscreen that shields ultraviolet rays by absorption and scattering. Zinc oxide is an N-type semiconductor, and the electrons in the valence band can accept energy from ultraviolet light to cause transitions, which is also the principle of their ultraviolet absorption. The function of scattering ultraviolet light is related to the particle size of the material. When the size is much smaller than the wavelength of ultraviolet light, the particles can scatter the ultraviolet light acting on them in all directions, thereby reducing the intensity of ultraviolet light in the irradiation direction. In addition, if the particle size of the raw material is too large, it will appear unnatural whitening when applied to the skin. Therefore, nano-sized particles have significant advantages compared to conventional sizes.

　　Nano Zinc oxide It is a stable compound that provides broad-spectrum UV protection (UVA and UVB), as well as antibacterial and anti-inflammatory effects, and is considered a safe and effective ingredient in sunscreen evaluations in almost all countries. However, their extremely small size gives them higher chemical activity and may be absorbed by the human body, posing potential hazards to human health and the environment. Therefore, the use of nano-zinc oxide remains highly controversial.

　　The above is an introduction to the application fields of zinc oxide. Shandong Xingyuan Zinc Industry Technology Co., Ltd. is a zinc oxide manufacturer. Welcome to contact us.


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