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Physical and chemical properties of zinc sulfide ZnS powder

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Overview of Zinc Sulfide ZnS

Zinc sulfide is a white to off-white or light yellow powder, which becomes darker when exposed to light, stable in dry air, and gradually oxidized to zinc sulfate when stored for a long time in humid air or containing water. Soluble in dilute inorganic acid, soluble in alkali, insoluble in water. Relative density 3.98 (alpha type), (d25) 4.102 (beta type). irritating.

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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 is 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:

Zn2+H2S=2H+ZnS

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.

Application of zinc sulfide ZnS

Zinc sulfide is often made from scrap and used for other purposes. Typical sources include smelters, slags, and pickling liquors. It is also a by-product of ammonia's methane synthesis, where zinc oxide is used to remove hydrogen sulfide impurities from natural gas.

High-purity crystalline zinc sulfide powder is an important basic material, which is widely used in civil, military, aerospace and other high-tech fields. It is also an extremely important window material for medium- and long-wave far-infrared precision guidance and far-infrared imaging, especially in the fields of national defense, military and other cutting-edge technologies. The applications of zinc sulfide are as follows: Luminescent material.

Zinc sulfide, with a small amount of a suitable activator, is highly phosphorescent and is currently used in a variety of applications from cathode ray tubes to X-ray screens to glow in dark products. When silver is used as the activator, the resulting color is bright blue with a maximum wavelength of 450 nm. The use of manganese produces a red-orange color around 590 nm. Copper glows for a long time and has the deep green glow we are familiar with. Copper-doped zinc sulfide ("ZnS+Cu") is also used in electroluminescent panels. It also exhibits phosphorescence due to impurities in blue or ultraviolet light.

Optical material

Zinc sulfide is also used as an infrared optical material, which transmits from visible wavelengths to just over 12 microns. It can be used as the plane of an optical window or the shape of a lens. It is made of hydrogen sulfide gas and zinc vapor microchips and is sold as FLIR grade (forward looking infrared), in which zinc sulfide is creamy yellow and opaque. When hot isostatic pressing (HIPed), the material can be transformed into a transparent water form known as Cleartran (trademark), an early commercial form sold as Irtran-2, but this name is now obsolete.

pigment

Zinc sulfide is a common pigment sometimes called sachtolith. Zinc sulfide forms lithopone when combined with barium sulfate.

catalyst

The fine ZnS powder is an efficient photocatalyst that generates hydrogen gas from water under illumination. Sulfur vacancies can be introduced into ZnS during the synthesis. This gradually turns the white to yellow ZnS into a brown powder and enhances the photocatalytic activity through enhanced light absorption.

Zinc sulfide ZnS price

The price of zinc sulfide and zinc sulfide products will vary randomly due to factors such as production costs, transportation costs, international conditions, exchange rates, and market supply and demand of zinc sulfide and zinc sulfide 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.

Suppliers of Zinc Sulfide ZnS

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.

Technical Parameter of Zinc Sulfide ZnS Powder :
Particle sizeZnSWaterFe,mg/kgCu,mg/kgPb, mg/kgNi, mg/kgCd,mg/kgMn, mg/kgPH
3-5μm99.99%≤0.8%<10<0.3<2.0<5.0<0.3<0.26.0-7.0


Zinc Sulfide Properties
Other NamesZnS powder, zinc sulphide, zinc sulfide phosphor
CAS No.1314-98-3
Compound FormulaZnS
Molecular Weight97.45
AppearanceWhite to off-white Powder
Melting Point1830 °C
Boiling PointN/A
Density4.1 g/cm3
Solubility in H2ON/A
Poisson's Ratio0.28
Specific Heat520 J/kg-K
Thermal Conductivity 27 W/m-K
Thermal Expansion6.5 µm/m-K
Young's Modulus75 GPa
Zinc Sulfide Health & Safety Information
Signal WordN/A
Hazard StatementsN/A
Flash PointN/A
Hazard CodesN/A
Risk CodesN/A
Safety StatementsN/A
RTECS NumberZH5400000
Transport InformationNONH for all modes of transport
WGK Germanynwg



With Russia taking the lead on Poland and Bulgaria at the end of last month, there appears to be a growing sense of compromise within the EU over whether to accept Moscow's proposed rouble settlement order. 

Italy's prime minister said recently that European companies would be able to buy gas in roubles without violating sanctions.  This apparently ignores the guidance of hardliners in the EU to "fight to the end". 

For weeks, European companies have been trying to find ways to meet Russia's payment demands for the rouble while maintaining vital gas supplies without violating sanctions against Moscow. 

Late last month, European Commission President Von der Leyen said operating under the mechanism would violate sanctions and asked European companies not to bow to Russian demands. However, the EU has yet to issue more rigorous written guidelines on how companies should pay Gazprom. 

The Italian prime minister said recently, "There is no official announcement from the European Union about what ruble settlement means for sanctions violations, and no one has said whether ruble payments violate sanctions or not. It's a grey area." 

"In fact, most gas importers are already opening rouble accounts for deals with Gazprom,"

He also used German companies as a shield. He said Germany's largest gas importer had already paid in rubles. "In fact, we saw evidence yesterday that the largest gas importer in Germany has already paid in rubles."

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