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High-purity, high-yield method for preparing ws2 layered sheet-like nanostructures

A nanostructure and lamellar technology, which is applied in the high-yield preparation of WS2 lamellar nanostructures and high-purity fields, can solve the problems of limitation, high preparation cost, low yield, etc., to achieve uniform diameter and thickness, and high product yield. , the effect of low cost

Inactive Publication Date: 2018-05-04
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common practice of this kind of method is to use volatile W-containing precursors (such as W(CO) 6 、WO 3 etc.) and H 2 S and other reducing sulfur-containing atmospheres are interacted and deposited, so the morphology of the generated nanostructures is largely limited by the composition and structure of the W-containing precursor, the composition and structure of the substrate, the deposition atmosphere and temperature, and other conditions. low output
Furthermore, depending on the complexity of the physical vapor deposition equipment, fabrication costs can be high

Method used

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  • High-purity, high-yield method for preparing ws2 layered sheet-like nanostructures
  • High-purity, high-yield method for preparing ws2 layered sheet-like nanostructures
  • High-purity, high-yield method for preparing ws2 layered sheet-like nanostructures

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: in the horizontal vacuum tube furnace, 1g of analytically pure WO will be housed 3 A central heating zone placed in a powdered alumina porcelain boat, with a WO 3 Place an alumina porcelain boat with 20g of high-purity S powder at 10cm of the powdered porcelain boat.

[0038] Before heating, evacuate the whole system to 10 with a vacuum pump -2 Pa below, then pass high-purity nitrogen into the system, and repeat 3 times until the residual air in the system is eliminated. Then the temperature was raised to 1350° C. at a rate of 20° C. / min and kept for 3 hours. During the whole heating process, keep the flow rate of the carrier gas at 100 sccm until the furnace naturally cools down to room temperature, then the evaporation source WO 3 High-purity, high-density WS can be obtained in the alumina porcelain boat of powder 2 Lamellar nanostructures.

[0039] The synthesized product is single-phase WS 2 , the preferred growth direction is the (002) crystal p...

Embodiment 2

[0040] Embodiment 2: in the well-type vacuum electric furnace, 1g of analytically pure WO will be housed 3 A central heating zone placed in a powdered alumina porcelain boat, with a WO 3 Place an alumina porcelain boat containing 1g of analytically pure sublimated S powder at 1cm of the powder boat.

[0041] Before heating, evacuate the whole system to 10 with a vacuum pump -2 Below Pa, then inject high-purity argon into the system, and repeat 3 times until the residual air in the system is eliminated. Then the temperature was raised to 950° C. at a rate of 5° C. / min and kept for 0.5 hours. During the whole heating process, keep the flow rate of the carrier gas at 20 sccm until the furnace naturally cools down to room temperature, then the evaporation source WO 3 High-purity, high-density WS can be obtained in the alumina porcelain boat of powder 2 Lamellar nanostructures.

[0042] The synthesized product is single-phase WS 2 , the preferred growth direction is the (002)...

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Abstract

The invention relates to a high-purity, high-yield method for preparing WS2 layered nanostructures, belonging to the technical field of material preparation. The invention adopts a vacuum heating furnace, uses tungsten trioxide powder and sulfur powder as evaporation sources, and separates heating and evaporating methods in a vacuum environment. Driven by the carrier gas, high-yield one-step synthesis obtains a high-purity, high-density WS2 layer. Sheet-like nanostructures. The method has the advantages of simple equipment and process, strict controllable material synthesis and growth conditions, high product yield, low cost and the like. The obtained WS2 layer-like nanostructure has a thickness between 50-250nm and a diameter between 20-40μm. The product has high purity, the diameter and thickness of the nanostructure are uniform, and the shape is controllable. It is expected to be used in solid lubricants, lubricating Oil additives, semiconductor devices and new energy materials have been widely used.

Description

technical field [0001] The invention relates to a high-purity, high-yield preparation of WS 2 The invention relates to a method for lamellar nanostructures, which belongs to the technical field of material preparation. Background technique [0002] Tungsten disulfide (WS 2 ) is a solid lubricating material used earlier, with excellent friction and lubrication properties, radiation resistance, thermal stability and oxidation resistance, high compression resistance and a wide range of temperature applications. WS 2 It was first used in the lubrication of key parts of the American Mariner spacecraft launched in 1962, and the effect is excellent. WS 2 The preparation and application of it has been strictly kept secret as a military technology, and it was not until 1984 that the United States relaxed its control, and then WS 2 Began to be introduced into other industrial fields, such as lubricating oil additives. [0003] Studies have shown that WS 2 The excellent anti-fri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/46C30B29/64C30B25/00B82Y40/00
Inventor 申振广彭志坚钱静雯符秀丽
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)