Overview of Zinc Sulfide ZnS Powder
Zinc sulfide is an inorganic compound with the chemical formula ZnS. It is a white or yellowish powder that darkens when exposed to sunlight. It is stable in dry air, and will gradually oxidize into zinc sulfate in humid air for a long time. It is usually formed by the action of hydrogen sulfide and zinc salt solution. Zinc sulfide has excellent fluorescence effect and electroluminescence function. In particular, nano-zinc sulfide has a unique photoelectric effect and exhibits many excellent properties in the fields of electricity, magnetism, optics, mechanics, and catalysis.
Physical and chemical properties of zinc sulfide ZnS powder
The chemical bond between Zn and S of zinc sulfide tends to be a covalent bond. The crystal has three different configurations: low temperature type, that is, sphalerite structure, abundant in nature, colorless cubic crystal, Zn, S coordination number is 4, relative density is 4.10. 1020 ℃ High temperature type; high temperature type, namely wurtzite structure, colorless hexagonal crystal, Zn, S coordination number of 4, relative density 3.98, melting point about 1700 ℃. High temperature stable structure of zinc sulfide; high pressure type, namely chloride In the sodium structure, the coordination number of Zn and S is 6, and the relative density is 5.21. There is also a water-based compound, ZnS·H2O, which is a white powder with a relative density of 3.98 and a melting point of 1049 °C. Zinc sulfide is insoluble in water and dilute alkali, insoluble in acetic acid, but soluble in low-concentration strong acids such as hydrochloric acid, releasing hydrogen sulfide. The solubility product of zinc sulfide is similar to the K1·K2 value of hydrosulfuric acid, so the following equilibrium exists in dilute acid:
It can be seen that in the strong acid zinc salt solution, the hydrogen sulfide gas cannot obtain zinc sulfide precipitation. Passing hydrogen sulfide gas into the zinc salt solution can get zinc sulfide precipitation, but the precipitation is not complete. Using ammonium sulfide solution as precipitating agent, the zinc ions in the zinc salt solution can be completely precipitated into zinc sulfide. Since the ammonium sulfide solution is alkaline, the acidity of the system can be reduced. In industry, the above method should be used to isolate the air. White zinc sulfide darkens when exposed to light, and is easily oxidized to zinc sulfate in the air. Zinc sulfide can be used alone as a white paint pigment or in combination with zinc oxide. Pure zinc sulfide does not emit light. If a trace amount of manganese, copper, and silver are added to the zinc sulfide crystal as an activator, it can emit different colors of fluorescence after being illuminated, called phosphor powder, which is used to make fluorescent screens and luminous paints. Zinc sulfide is also used in leather, enamel, rubber, dye and other industries.
Zinc sulfide is corrosive and toxic. It can irritate the skin. Operators should wear work clothes and protective equipment. The workshop should be well ventilated.
Application of Zinc Sulfide ZnS Powder
1. It can be used as analytical reagent, phosphor matrix, photoconductor material; or used in the manufacture of dyes, coatings, pigments, glass, curing oil, etc.
2. Zinc sulfide is widely used in the production of infrared windows, fairings, and infrared optical components. It has the characteristics of high purity, insoluble in water, moderate density and easy processing. Zinc sulfide has good refractive index uniformity and consistency. It has good image transmission performance in the 8-12μm band, but some parts start to absorb after 10um. In the mid-infrared, transmission is higher, and absorption and scattering increase with shortening of wavelength. Zinc sulfide is highly resistant to harsh environments, with twice the hardness and breaking strength of zinc selenide.
Robust front optics for zinc sulfide thermal imaging systems in the infrared window and thermal band (8 to 14 μm).
Single crystal zinc sulfide is available, but not common. In the usual spectral range, the scattering is very low. It can be used as a high-power laser device under the condition that the bulk absorption and internal structural defects of the material are strictly controlled, and the polishing technology with minimal damage and the coating technology with the highest optical quality are used.
Zinc sulfide oxidizes significantly at 300 ℃, plastic deformation occurs at about 500 ℃, and dissociation occurs at about 700 ℃. For safety reasons, zinc sulfide windows should not be used in normal environments above 250°C.
3. For optical coating targets, X-ray screens, luminous dials with trace amounts of radium or neodymium salts added, TV screens, and paint pigments.
Zinc sulfide ZnS product price
The price of zinc sulfide ZnS products will change randomly due to factors such as production costs of zinc sulfide ZnS products, transportation costs, international conditions, exchange rates, and market supply and demand of zinc sulfide ZnS products. Tanki New Materials Co., Ltd. aims to help industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for Zinc Sulfide ZnS products, please feel free to send an inquiry to get the latest Zinc Sulfide ZnS product prices.
Supplier of Zinc Sulfide ZnS Products
As a global supplier of zinc sulfide ZnS products, Tanki New Materials Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineered materials. The company has successfully developed a series of powder materials (molybdenum disulfide, tungsten sulfide, bismuth sulfide, etc.) high-purity targets, functional ceramics and structural devices, and provides OEM services.
|Zinc Sulfide Properties|
|Other Names||ZnS powder, zinc sulphide, zinc sulfide phosphor|
|Appearance||White to off-white Powder|
|Melting Point||1830 °C|
|Solubility in H2O||N/A|
|Specific Heat||520 J/kg-K|
|Thermal Conductivity||27 W/m-K|
|Thermal Expansion||6.5 µm/m-K|
|Young's Modulus||75 GPa|
|Zinc Sulfide Health & Safety Information|
|Transport Information||NONH for all modes of transport|
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