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Zinc sulfide
The chemical formula is ZnS. It is a white or off-white powder. Zinc Sulfide turns darker when exposed to sunlight.
Zinc Sulfide – A Chemical Property:
Zinc Sulfide is stable when in dry air. When in humid air over a period of time or in air that contains moisture, the zinc sulfide will gradually oxidize into zinc sulfate. Zinc Sulfide is insoluble in water but soluble in diluted inorganic acids.
Zinc sulfide, or zinc sulfide, is usually obtained through the reaction of hydrogen sulfide with zinc salt solutions. When a small quantity of Cu,Mn,Ag is added to the ZnS crystals as an activater, they can emit different colours of fluorescence when illuminated. Zinc Sulfide has many uses, including as an analytical reagent for paints, opaque and white glass, rubber filling, plastic and for phosphor preparation.
Zinc Sulfide Application:
The zinc sulfide compound semiconductors are gaining attention for their excellent physical properties such as wide band gaps, high refractive indices, and high levels of light transmittance within the visible spectrum.
Zinc Sulfide exhibits excellent electroluminescence and fluorescence effects. Nano-zinc has a unique effect. It has excellent properties in the areas of magnetism, electricity, optics, mechanicals, and catalysis. It is for this reason that research into nano-zincsulfide was a success. In 1994, Bhargava published a report stating that surface passivation nano-ZnS phosphors had an external quantum efficiencies of up to 18% when heated at high temperatures. They also had shortened fluorescence lives by 5 orders and also emitted light. ZnS has a much improved performance that opens a whole new field of application.
Zinc sulfide may be used for making white pigments and glasses, luminous dust, rubber, paint, plastic, etc.
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