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The scope and application of zinc sulfide

2021-12-03 09:02:38  News

Physicochemical properties of zinc sulfide

The product has two crystal forms. Type A zinc sulfide is a colorless hexagonal crystalline powder or white to off-white or light yellow powder. The relative density is 4.087. The 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. Beta-type zinc sulfide is cubic crystal. White to off-white or yellow powder. The relative density is 4.102, and the melting point is l700°C. Coefficient of thermal expansion (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 the air. The crystal form transition temperature is 1020°C. Soluble in dilute mineral acid. Insoluble in water.

Preparation method of zinc sulfide

Double decomposition method; add zinc sulfate solution into the reactor, slowly add ammonium sulfide under stirring to carry out the metathesis reaction, produce zinc sulfide and ammonium sulfate, remove ammonium sulfate by filtration, and then concentrate by evaporation, cooling and crystallization, centrifugal separation to obtain sulfide Zinc finished product.

The safety of zinc sulfide

Packed in barrels or woven bags lined with polyethylene bags. The net weight of each drum (bag) is 50kg or 25kg. Store in a ventilated and dry warehouse, avoid open storage. The container must be sealed to prevent moisture. It shall not be stored or transported together with edible items and feed. There should be cover during transportation. To prevent rain and sun, handle with care when loading and unloading to prevent the package from breaking. This product is corrosive. poisonous. Can irritate the skin. Operators must wear work clothes and protective equipment. The workshop should be well ventilated.

Overview of zinc sulfide ZnS

Zinc sulfide is white to off-white or light yellow powder, and the color becomes darker when it is light.It is stable in dry air,and when it is stored in humid air for a long time or contains water,it gradually oxidizes to zinc sulfate. It is soluble in dilute inorganic acid,soluble in alkali,Insoluble in water.Relative density 3.98 (α type),(d25) 4.102 (β type).Irritating.

Application of zinc sulfide ZnS 

Zinc sulfide is usually made from waste materials and used for other purposes. Typical sources include smelters,slag,and pickling liquid.It is also a by-product of methane synthesis of ammonia,where zinc oxide is used to remove hydrogen sulfide impurities in natural gas.

High-purity crystalline zinc sulfide powder is an important basic material,which is widely used in high-tech fields such as 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 field of national defense, military and other cutting-edge technologies.The applications of zinc sulfide are as follows: Luminescent material

Zinc sulfide, plus a small amount of suitable activator, has strong phosphorescence and is currently used in various applications from cathode ray tubes to X-ray screens to emit light in dark products. When silver is used as an activator The resulting color is bright blue with a maximum of 450 nm.The use of manganese produces an orange-red color of about 590 nm. Copper can emit light for a long time and has the familiar dark green luminescence effect. 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 materials

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

 pigment

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

 catalyst

The fine ZnS powder is an effective photocatalyst,which generates hydrogen from water when illuminated.Sulfur vacancies can be introduced into the ZnS during the synthesis process.This gradually turns the white to yellow ZnS into a brown powder and passes through the enhanced light Absorption enhances the photocatalytic activity.

The price of zinc sulfide ZnS 

The price of zinc sulfide ZnS products will vary randomly with factors such as the production cost 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 various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set 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 Co., Ltd has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering 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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