Zinc sulfide is a white to off-white or light yellow powder, and the color becomes darker when seen. Zinc sulfide is stable in dry air, and when left in humid air for a long time or contains moisture, it will gradually oxidize to zinc sulfate.
Zinc Sulfide Powder Properties
Zinc sulfide is an inorganic compound with the chemical formula ZnS. When it is placed in humid air or contains moisture, it will gradually oxidize to zinc sulfate. Zinc sulfide exists in sphalerite, it is insoluble in water but easily soluble in acid.
Zinc sulfide turns into crystals when burned in H2S gas. The α variant is a colorless hexagonal crystal with a density of 3.98g/cm3 and a melting point of 1700°C; the β variant is a colorless cubic crystal with a density of 4.102g/cm3, which is transformed into the α type at 1020°C.
Zinc sulfide is generally obtained by the action of hydrogen sulfide and zinc salt solution. If a small amount of Cu, Mn, Ag is added as an activator in the crystalline ZnS, it can emit different colors of fluorescence after being illuminated.
Zinc Sulfide Powder Applications
Zinc sulfide is used as an analytical reagent, phosphor matrix, and photoconductor material; it is also used in the manufacture of dyes, paints, pigments, glass, and curing oil.
Zinc sulfide is easy to disperse and not agglomerate, it is neutral white and has good optical properties. It is often used as a component of thermosetting plastics, thermoplastics, reinforced fiber glass, flame retardants, artificial rubber and dispersants.
Because zinc sulfide has good sintering properties, it is applied to ceramics. Studies have shown that the sintering performance of monodisperse zinc sulfide powder is higher than that of agglomerate zinc sulfide, and the sintering performance is enhanced with the decrease of particle size.
Because nano-zinc sulfide is a photonic material, it can generate photon holes, and the energy level change and the widening of the energy gap brought about by the quantum size effect enhance its redox ability. It is an excellent photocatalytic semiconductor.
Zinc sulfide is an infrared optical material. It has high infrared transmittance and excellent optical, mechanical and thermal comprehensive performance in the 3-5p.m and 8-12ym bands. It is the best dual-band infrared observation window for aircraft and hood material.
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