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Preparation method of inorganic fullerene structured molybdenium disulfide

An inorganic fullerene-like and molybdenum disulfide technology, which is applied in the field of material technology preparation and can solve the problems of limited methods, limited output, and limited wide application of inorganic fullerene-like sulfides

Inactive Publication Date: 2006-03-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, so far, the methods for preparing inorganic fullerene-like sulfides are very limited, which greatly limits their wide application in tribology and other fields.
For MoS 2 , so far, the most effective method is to use the method of fluidized bed with HS 2 Reduction of corresponding oxide particles to prepare inorganic fullerene-like MoS 2 Nanoparticles, but yields are still relatively limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 28.88g ammonium tetrathiomolybdate (purity 99.8%, 0.1mol) and make 1L aqueous solution, the concentration is 0.1mol / L, put the solution into a spray dryer, and dry the solution. The air velocity of the spray dryer is 150m / s, the inlet temperature is 220°C, and the outlet temperature is 120°C. The particle size of the obtained molybdenum trisulfide particles is between 0.2 and 5 μm. Put molybdenum trisulfide particles into a quartz tube, heat to 850°C in a tube furnace, keep it warm for 5 hours, and then cool with the furnace. A mixed gas of argon and hydrogen (90% argon) was passed through the quartz tube. The particle size of the obtained molybdenum disulfide is still between 0.2 and 5 μm, and it is a fullerene structure particle.

Embodiment 2

[0018] Take 2.9g of ammonium tetrathiomolybdate (purity 99.8%, 0.01mol), make 1L aqueous solution, the concentration is 0.01mol / L, put the solution into a spray dryer, and dry the solution. The air velocity of the spray dryer is 150m / s, the inlet temperature is 220°C, and the outlet temperature is 120°C. The particle size of the obtained molybdenum trisulfide particles is between 0.2 and 5 μm. Put molybdenum trisulfide particles into a quartz tube, heat to 850°C in a tube furnace, keep it warm for 5 hours, and then cool with the furnace. A mixed gas of argon and hydrogen (85% argon) was passed through the quartz tube. The particle size of the obtained molybdenum disulfide particles is still between 0.2 and 5 μm, but the thickness of the spherical shell particles is reduced.

Embodiment 3

[0020] Take 14.4g ammonium tetrathiomolybdate (purity 99.8%, 0.05mol), and make 1L aqueous solution, the concentration is 0.05mol / L, put the solution into a spray dryer, and dry the solution. The air velocity of the spray dryer is 150m / s, the inlet temperature is 220°C, and the outlet temperature is 120°C. The particle size of the obtained molybdenum trisulfide particles is between 0.2 and 5 μm. Put molybdenum trisulfide particles into a quartz tube, heat to 850°C in a tube furnace, keep it warm for 5 hours, and then cool with the furnace. A mixed gas of argon and hydrogen (95% argon) was passed through the quartz tube. The particle size of the obtained molybdenum disulfide is still between 0.2 and 5 μm.

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Abstract

A process for preparing the MoS2 particles with inorganic fullerene structure includes such steps as dissolving the ammonium tetrathiomolybdate in water, spray drying to obtain superfine MoS3 particles, and heating the MoS3 in the mixture gas of H2 and Ar gas to reduce MoS3 into MoS2 with inorganic fullerene structure.

Description

technical field [0001] The invention relates to a preparation method in the technical field of materials, in particular to a preparation method of molybdenum disulfide with an inorganic fullerene structure. Background technique [0002] It is well known that solid lubricants with good tribological properties such as graphite, transition metal sulfide MX 2 (M=W or Mo, X=S or Se) is of great scientific importance in environments where liquid lubricants cannot be used, such as space technology, ultra-high vacuum or automotive transmissions. These materials have extremely low shear stresses due to their layered structure and the low interlayer forces (van der Waals forces). Although these materials have excellent wear-reducing properties and a long life under vacuum, due to the chemical activity of the unsaturated dangling bonds at the crystal edges, they are easy to adhere to the metal surface and be oxidized during the friction process, making them in the wet The tribologica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06
Inventor 何丹农尹桂林涂江平夏正志余震
Owner SHANGHAI JIAO TONG UNIV
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