Method for preparing nano WS2/MoS2 granules

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

Inactive Publication Date: 2010-10-13
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 zirconia grinding balls, and 25kg deionized water were put into a rod-type ball mill, the ball mill speed was 200r / min, the diameter of the grinding balls was 0.8mm, and eight ultrasonic generators with a power of 1200W were used to apply ultrasonic waves with a frequency of 20kHz. Grind for 6 hours, then take out the slurry and dry it in a freeze dryer with a temperature of -45°C and a vacuum of 20Pa 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] SEM pictures of the particles are attached figure 1 .

Embodiment 2

[0038] Take 4kg MoS 2 Coarse powder, 50kg zirconia grinding balls, and 24kg deionized water were put into a rod-type ball mill, the ball mill speed was 300r / min, the diameter of the grinding balls was 1.8mm, and eight ultrasonic generators with a power of 800W were used to apply ultrasonic waves with a frequency of 20kHz. Grind 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] SEM pictures of the particles are attached figure 2 .

Embodiment 3

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

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Abstract

The invention discloses a method for preparing nano WS2/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 / MoS 2 A preparation method of 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 2H-type structure ("H" stands for hexagonal system, "2" refers to the number of sandwich layers in a combined unit), and the lamellar structure of WS 2 and MoS 2 The particles exhibit excellent lubricating properties due to the easy slippage between layers. [0003] WS 2 Originally used by the United States for the lubrication of key parts of the Mariner spacecraft from 1962 to 1971, with excellent results, it began to be used in the industrial field, but only in the aerospace, aerospace and defense industries until 1984 MSC of the United States will WS 2 The introduction of lubrication technology into the field of general industrial lubrication, WS 2 It was quickly popularize...

Claims

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Application Information

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Patent Type & Authority Applications(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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