Zinc oxide
更新时间：2021-12-14 13:49:50
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|
常用名 |
氧化锌 |
CAS号 |
1314-13-2 |
| 价钱 |
￥需询单/1kg |
纯度 |
99.0% |
| 备货期 |
需询单 |
库存 |
询单 |
产物详情（用途，包装等）
Zinc oxide is an important and widely used physical sunscreen. The principle of shielding ultraviolet rays is absorption and scattering. Zinc oxide is an N-type semiconductor, and the electrons in the valence band can accept the energy in the ultraviolet light to undergo a transition. This is also the principle of their absorption of ultraviolet light. The function of scattering ultraviolet rays is related to the particle size of the material. When the size is much smaller than the wavelength of ultraviolet rays, the particles can scatter the ultraviolet rays acting on them in all directions, thereby reducing the intensity of ultraviolet rays in the irradiation direction. In addition, if the particle size of this material is too large, unnatural whitening will occur when applied to the skin. Therefore, nano-sized particles have a significant advantage compared with the usual size.
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