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Preparation of zinc sulfide decomposition method

2022-01-21 09:55:19  News

What is zinc sulfide

Zinc sulfide is an inorganic compound with the chemical formula ZnS. It is a white or slightly yellow powder, and the color becomes darker. It is stable in dry air, and will gradually oxidize into zinc sulfate when placed in humid air for a long time or when it contains moisture.

Zinc sulfide has two crystal forms. Type A zinc sulfide is colorless hexagonal crystalline powder or white to off-white or light yellow powder. The relative density is 4.087. Melting point is 1700°C. Thermal conductivity 25.1 w/(m/K), thermal expansion coefficient (volume): 100 ℃, 0.163; 200 ℃, 0.395; 400 ℃, 0.919; 800 ℃, 2.146. Type B zinc sulfide is cubic crystal. White to off-white or yellow powder. The relative density is 4.102, and the melting point is 1700℃. Thermal expansion coefficient (volume): 100°C, 0.156; 200°C, 0.386; 400°C, 0.898; 800°C, 1.996. It can be slowly oxidized to sulfate in air. The crystal transformation temperature is 1020℃. Soluble in dilute inorganic acids. not soluble in water.

Preparation of zinc sulfide decomposition method

Preparation of zinc sulfide decomposition method

Add zinc sulfate solution to the reaction kettle, slowly add ammonium sulfide under stirring to carry out metathesis reaction, generate zinc sulfide and ammonium sulfate, filter to remove ammonium sulfate, evaporate and concentrate, cool and crystallize, and centrifuge to obtain zinc sulfide finished product.

What are the physical and chemical properties of zinc sulfide

The research on zinc sulfide fluorescent material has a history of more than 130 years since it was discovered by French chemist Cidotte in 1868. From the 1920s to the 1940s, the study of zinc sulfide materials has attracted people's attention.

What are the physical properties of zinc sulfide

White or slightly yellow powder. 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; Exist in sphalerite. Insoluble in water, soluble in acid. See the daylight dim.

What are the chemical properties of zinc sulfide

Converted to zinc sulfate in humid air for a long time. It is generally derived from the action of hydrogen sulfide and zinc salt solution. If a small amount of Cu, Mn, and Ag are added to the crystalline ZnS as activators, different colors of fluorescence can be emitted after being illuminated. Used as analytical reagents, coatings, paints, white and opaque glass, filled rubbers, plastics and the preparation of phosphors.

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.

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 frontier technology fields such as national defense and military. The applications of zinc sulfide are as follows: Luminescent materials

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 zinc sulfide products will vary with random factors, such as production cost of zinc sulfide zinc sulfide products, transportation costs, international situation, exchange rate and market supply and demand of 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



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