Luminescent material of Zinc sulfide


Zinc sulfide (or zinc sulfide) 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 widely used as a pigment. In its dense synthetic form, zinc sulfide can be transparent and is used as a window for visible and infrared optics. ZnS exists in two primary crystalline forms. This dualism is an example of polymorphism. In each form, the coordination geometry at Zn and S is tetrahedral. The more stable cubic form is also known as zinc blende or sphalerite. The hexagonal form is known as the mineral wurtzite, although it also can be produced synthetically.[2] The transition from the sphalerite to the wurtzite form occurs at around 1020 °C. A tetragonal form is a scarce mineral called polhemusite, with the formula (Zn, Hg)S. Zinc sulfide exhibits intense phosphorescence with the addition of a few ppm of suitable activator. The phenomenon was described by Nikola Tesla in 1893[3]), 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 of 450 nanometers. Using manganese yields an orange-red color at around 590 nanometers. Copper gives a long-time glow, and it has the familiar greenish glow-in-the-dark. Copper-doped zinc sulfide ("ZnS plus Cu") is also used in electroluminescent panels.[4] It also exhibits phosphorescence due to impurities on illumination with blue or ultraviolet light. If you are looking for high quality, high purity, and cost-effective zinc sulfide, or if you require the latest price of zinc sulfide, please feel free to email contact mis-asia.

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