The physical and chemical properties of Zinc sulfide ZnS powder

Overview of Zinc sulfide ZnS powder

Zinc sulfide is an inorganic compound with a chemical formula of ZnS and an appearance of white to off-white or light yellow powder. See the light darken. It is stable in dry air, and when placed in humid air for a long time or contains moisture, it will gradually oxidize to zinc sulfate. Soluble in dilute inorganic acid, soluble in alkali, insoluble in water. The relative density is 3.98 (α type), (d25) 4.102 (β type). It is irritating.

The physical properties of Zinc sulfide ZnS powder

White or slightly yellow powder. It turns into crystals when burning in H2S gas. The alpha variant is a colorless hexagonal crystal with a density of 3.98g/cm3 and a melting point of 1700±28°C (202.66 kPa-20 atmospheres); the beta variant is a colorless cubic crystal with a density of 4.102g/cm3, which is converted to at 1020°C α type. Exist in sphalerite

The chemical properties of Zinc sulfide ZnS powder

Insoluble in water, soluble in acid. See the sunlight dimmed. It is converted into 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, Ag is added as an activator in the crystalline ZnS, it can emit different colors of fluorescence after being illuminated. Used as analytical reagents, coatings, paints, white and opaque glass, filling rubber, plastics, and for preparing phosphors. It is made by co-heating sulfur and zinc. The relative density is 4.087.

Thermal conductivity 25.1w/(m·K),

Coefficient of thermal expansion (volume): 100°C, 0.163; 200°C, 0.395; 400°C, 0.919; 800°C, 2.146.

B-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.

Application of zinc sulfide ZnS powder

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

High-purity crystalline zinc sulfide ZnS powder is an important basic material, which is widely used in high-tech fields such as civil, military, aerospace, etc. It is also an extremely important medium and long-wave window material. Far-infrared precision guidance and far-infrared imaging, especially in frontier technical fields such as national defense and military. The uses of zinc sulfide are as follows:

Luminescent material

Zinc sulfide ZnS, 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 the activator, the color produced 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 luminous effect. Copper-doped zinc sulfide ("ZnS+Cu") is also used in electroluminescent panels. It also shows phosphorescence due to impurities in blue or ultraviolet light.

Optical materials

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

pigment

Zinc sulfide ZnS is a common pigment, sometimes called sandstone. When combined with barium sulfate, zinc sulfide forms Lithopone.

catalyst

Zinc sulfide ZnS fine powder is an effective photocatalyst, which generates hydrogen from water under light. Sulfur vacancies can be introduced into ZnS during the synthesis process. This gradually turns white to yellow ZnS into brown powder and enhances photocatalytic activity through enhanced light absorption.

Zinc sulfide ZnS price

The price of zinc sulfide ZnS products will vary with the production factors of zinc sulfide ZnS products, transportation costs, international situations, exchange rates and the influence of zinc sulfide ZnS market supply and demand. 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.

Zinc sulfide ZnS supply

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.