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zinc sulfide properties
Zinc sulfide (ZnS) is an intrinsic semiconductor with a wide band gap, which makes it useful for applications in the visible and infrared range. It is often doped with different activators for luminescent applications, including phosphors and electroluminescent panels. It is also used as a coating material for infrared windows and domes. It has also been found to be useful as a catalyst in the removal of hydrogen sulfide impurities from natural gas.
It exists in two polymorphic forms, sphalerite and wurtzite. Both of these form stable crystalline powders. Zinc Sulfide is insoluble in water, but is soluble in acids. It is incompatible with strong oxidizing agents and is sensitive to air and moisture. It is usually stored in dry air conditions and kept away from sunlight.
The phosphorescence of ZnS has made it useful for several decorative and electronic uses, such as X-ray and television screens, and for luminous dials on radium watches. It is also used as a scintillation detector in nuclear physics. It is one of the common components of phosphors for cathode ray tubes. It is also a component of semiconductor quantum dots, typically with cadmium selenide as the core.
Zinc Sulfide is also used as a white pigment in paints, mastics and rubbers. It can be used in combination with other chemicals for flame retardant applications. It is also an ingredient in some glass-fiber reinforced plastics, thermoplastics and high-temperature resins. Zinc Sulfide is available in different grades for various applications. It is nontoxic and not considered harmful to humans, but may irritate the skin, eyes and respiratory tract. It decomposes in the presence of acid, so it should be stored in a cool, dry place.
