Zinc Sulfide

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Related to Zinc Sulphide: zinc sulphate, Copper sulphide

zinc sulfide

[′ziŋk ′səl‚fīd]
(inorganic chemistry)
ZnS A yellowish powder that is insoluble in water, soluble in acids; exists in two crystalline forms (alpha, or wurtzite, and beta, or sphalerite); beta becomes alpha at 1020°C, and sublimes at 1180°C; used as a pigment for paints and linoleum, in opaque glass, rubber, and plastics, for hydrosulfite dyeing process, as x-ray and television screen phosphor, and as a fungicide.

Zinc Sulfide

 

ZnS, a white powder, with a density of 3.98–4.09 g/cm3. Zinc sulfide does not melt at ordinary pressure, but at a pressure of 15 meganewtons/m2 (150 kilogramsforce/cm2), it melts at 1850°C. In moist air, zinc sulfide is oxidized to zinc sulfate; upon heating in the presence of air, ZnO and SO2are formed. Zinc sulfide is insoluble in water but is soluble in acids, with the formation of the corresponding salts and the liberation of hydrogen sulfide. It is encountered in nature as the minerals sphalerite (zinc blende) and wurtzite, ZnS, which are the major sources for the production of zinc (seeSPHALERITE). Zinc sulfide may be produced by passing hydrogen sulfide through solutions of zinc salts. In the presence of traces of copper, cadmium, or silver, zinc sulfide acquires the capacity to luminesce.

Zinc sulfide is used as a component of luminophores: ZnS·Ag for color kinescopes, (Zn,Cd)S·Ag for X-ray tubes, and ZnS·Cu for luminous display panels. It is also a semiconductor material; in particular, it is used in semiconductor lasers.

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References in periodicals archive ?
However, zinc sulphide was ini-tially so expensive to produce and easy to be damaged by moisture, that its commercial potential did not take until the 1990s.
The break though in the 90s was the ability to coat each zinc sulphide particle with an oxide, to protect it from moisture.
Pelikon sources its zinc sulphide in powder form from the US.
To construct an open pit zinc mine in Gamsberg, South Africa US$630 million (about N$7 billion), the majority of the investment will be utilized, while the converted refinery at Skorpion Zinc will be involved in refining zinc sulphide concentrates from the Gamsberg Mine into special high grade zinc metal.
Exploration with tools developed over the last 15 years has revealed new geological features like the hydrothermal vents which spew mineral-rich water at up to 400 [degrees] C and associated deposits of iron, copper and zinc sulphides.
Surface sampling recovered iron, copper and zinc sulphides along with anhydrite, silica and other oxides.
Two particular features of it distinguish it from all other routes from ore to metal: * Zinc sulphides are converted to zinc
The Holosec[TM] system has a web width of 150-300mm and can accommodate, in addition to aluminium, coatings such as zinc sulphides, copper, silver and chromium.