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Method for preparing nano WS2/MoS2 granules

A kind of particle and nano technology, applied in the field of preparation of nano WS2 or MoS2 particles, can solve the problems of complex process, difficult to realize industrial production, high cost, etc., and achieve the effect of simple process, low product cost and high production efficiency

Inactive Publication Date: 2012-01-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have disadvantages such as complicated process, fine operation, and high cost. They can only realize the preparation of a small amount of samples in the laboratory, and it is difficult to realize industrial production.

Method used

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  • Method for preparing nano WS2/MoS2 granules
  • Method for preparing nano WS2/MoS2 granules
  • Method for preparing nano WS2/MoS2 granules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 5kgWS 2 Coarse powder, 50kg of zirconia grinding balls, and 25kg of deionized water are put into a rod-type ball mill, the speed of the ball mill is 200r / min, the diameter of the grinding ball is 0.8mm, and 8 ultrasonic generators with a power of 1200W are used to apply ultrasonic waves with a frequency of 20kHz. Pulverize for 6 hours, then take out the powder slurry, and dry it in a freeze dryer with a temperature of -45°C and a vacuum of 20 Pa to obtain a finished product.

[0031] The particle size analyzed by laser diffraction particle size analyzer is:

[0032] d 10 =15nm

[0033] d 50 =90nm

[0034] d 90 =260nm

[0035] Average particle size = 95nm

[0036] The scanning electron microscope photos of the particles are attached figure 1 .

Embodiment 2

[0038] Take 4kg MoS 2 Coarse powder, 50kg zirconia balls, and 24kg deionized water are put into a rod-type ball mill, the ball mill speed is 300r / min, the diameter of the ball is 1.8mm, and 8 ultrasonic generators with a power of 800W are used to apply ultrasonic waves with a frequency of 20kHz. Pulverize for 5 hours, then take out the slurry, and dry it in a freeze dryer with a temperature of -50°C and a vacuum of 35Pa to obtain a finished product.

[0039] The particle size analyzed by laser diffraction particle size analyzer is:

[0040] d 10 =20nm;

[0041] d 50 =95nm;

[0042] d 90 = 280nm;

[0043] Average particle size = 100 nm.

[0044] The scanning electron microscope photos of the particles are attached figure 2 .

Embodiment 3

[0046] Take 5kg MoS 2 Coarse powder, 50kg of zirconia balls, and 15kg of deionized water are put into a rod-type ball mill, the speed of the ball mill is 350r / min, the diameter of the ball is 3mm, and 8 ultrasonic generators with a power of 500W are used to apply ultrasonic waves with a frequency of 20kHz, and compound wet crushing After 10 hours, the slurry was taken out and dried in a freeze dryer at a temperature of -40°C and a vacuum of 9 Pa to obtain a finished product.

[0047] The particle size analyzed by laser diffraction particle size analyzer is:

[0048] d 10 =35nm;

[0049] d 50 = 100nm;

[0050] d 90 =320nm;

[0051] Average particle size = 120 nm.

[0052] The scanning electron microscope photos of the particles are attached image 3 .

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Abstract

The invention discloses a method for preparing nano WS2 or MoS2 granules, which comprises the following steps of: 1, ultrasonic ball-milling, namely mixing ball-milling medium, nano WS2 or MoS2 granules and deionized water in a mass ratio of (10-15): 1: (3-6), and ball-milling the mixture under the action of ultrasonic; and 2, freeze drying, namely performing vacuum freeze drying on the slurry obtained by the ultrasonic ball-milling to obtain the nano WS2 or MoS2 granules. The nano WS2 or MoS2 granules prepared by the method have laminated structures, the length and width dimensions are 80 to 500 nanometers, the thickness dimension is 20 to 60 nanometers, and the average granularity is 70 to 120 nanometers. The method has the advantages of simple process, high production efficiency and low product cost, can realize industrialized production of the nano WS2 or MoS2 granules, and is suitable for superfine preparation of nonmetal powder with laminated structures.

Description

technical field [0001] The invention discloses a nano WS 2 or MoS 2 A method for preparing particles belongs to the technical field of powder material preparation. Background technique [0002] WS 2 and MoS 2 Both are transition metal dichalcogenides, and their crystal structure conforms to the structure of 2H type ("H" stands for hexagonal crystal system, "2" refers to the number of sandwich layers in a combined unit), and the WS of the lamellar structure 2 and MoS 2 Particles exhibit excellent lubricating properties due to the ease of slipping between layers. [0003] WS 2 It was originally used by the United States to lubricate key parts of the Mariner spacecraft from 1962 to 1971, and achieved excellent results. It was then applied in the industrial field, but only limited to aerospace, aviation and defense industries until 1984. US MSC company will WS 2 The introduction of lubrication technology into the field of general industrial lubrication, WS 2 It was quic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00C01G39/06B82B3/00
Inventor 毛大恒石琛毛向辉毛艳李登伶
Owner CENT SOUTH UNIV
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