Zinc Sulphide Powder

Zinc Sulphide Powder Description

Zinc sulfide Powder is an inorganic compound with the chemical formula of ZnS. This is the main form of zinc found in nature, where it mainly occurs as the mineral sphalerite. Although this mineral is usually black because of various impurities, the pure material is white, and it is widely used as a pigment. In its dense synthetic form, zinc sulfide can be transparent, and it is used as a window for visible optics and infrared optics.

Both sphalerite and wurtzite are intrinsic, wide-bandgap semiconductors. These are prototypical semiconductors, and they adopt structures related to many of the other semiconductors, such as gallium arsenide. The cubic form of ZnS has a bandgap of about electron volts at 300 kelvins, but the hexagonal form has a bandgap of about electron volts.

ZnS can be doped as either an n-type semiconductor or a p-type semiconductor. Fine ZnS powder is an efficient photocatalyst, which produces hydrogen gas from water upon illumination. Sulfur vacancies can be introduced in ZnS during its synthesis; this gradually turns the white-yellowish ZnS into a brown powder, and boosts the photocatalytic activity through enhanced light absorption Zinc sulfidic, with the addition of few ppm of suitable activator, exhibits strong phosphorescence, and is currently used in many applications, from cathode ray tubes through X-ray screens to glow in the dark products. When silver is used as an activator, the resulting color is bright blue, with a maximum at 450 nanometres.

Using manganese yields an orange-red color at around 590 nanometres. Copper gives a long-time glow, and it has the familiar greenish glow-in-the-dark. Copper-doped zinc sulfidic is used also in electroluminescent panels. It also exhibits phosphorescence due to impurities on illumination with blue or ultraviolet light.

Zinc Sulphide Powder  Related Information

Storage Conditions:

Airtight sealed, avoid light, and keep dry at room temperature.