A method for ball milling to prepare nanoscale powder

A nano-scale powder and ball milling technology, applied in grain processing and other directions, can solve the problems of cumbersome steps, increased ball milling time and energy consumption, etc.

Active Publication Date: 2020-11-27
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this two-step ball milling method is cumbersome and increases the time and energy consumption of ball milling.

Method used

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  • A method for ball milling to prepare nanoscale powder
  • A method for ball milling to prepare nanoscale powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) First prepare balls with different degrees of softness and hardness. The weight ratio of polyurethane balls to zirconia balls is 1:2, the diameter is 4mm, and the ball-to-material ratio is 3:1; add dispersant and binder, and stir Uniform, the dispersant is a mixture of citric acid and cetyltrimethylammonium bromide with a weight ratio of 1:2, the binder is polyvinyl alcohol, and the amount of the dispersant is 0.4% of the mass of the ITO powder %, the addition of the binder is 1.4% of the mass of the ITO powder.

[0032] 2) Add ITO powder (particle size: 10-30 μm) prepared by chemical co-precipitation method into the ball mill, then perform ball milling, use a mechanical transmission device to drive the grinding tank to perform circular vibration motion, grind at a speed of 1400rpm for 30min, and then cool For 30 minutes, this cycle was repeated 5 times, and ITO nano-powder with a particle size range of 336-502 nm was finally obtained. The obtained ITO nano-powder ha...

Embodiment 2

[0038] 1) First, prepare ball milling balls with different degrees of softness and hardness. The weight ratio of polyurethane balls to zirconia balls is 1:2, the diameter is 5mm, and the ball-material ratio is 2:1; add dispersant and binder, stir evenly, The dispersant is a mixture of citric acid and cetyltrimethylammonium bromide in a weight ratio of 1:2, the binder is polyvinyl alcohol, and the amount of the dispersant is 0.4% of the mass of the tungsten carbide powder , the amount of binder added is 1.4% of the mass of ZTO powder.

[0039] 2) Add ZTO powder (particle size: 10-30μm) into the ball mill, and then perform ball milling, use a mechanical transmission device to drive the grinding tank to perform circular vibration motion, grind at a speed of 1400rpm for 30min, then cool for 30min, and cycle like this for 5 times, and finally The ZTO nanometer powder with a particle diameter ranging from 600 to 800 nm is obtained, and the obtained ZTO nanometer powder has a uniform...

Embodiment 3

[0044] Using ITO powder with a particle size of 10-30 μm as the raw material powder, ball milling was carried out according to the method in Example 1, and a total of 10 groups of experiments were carried out, numbered 1-10;

[0045] Using ITO powder with a particle size of 10-30 μm as the raw material powder, ball milling was carried out according to the method in Comparative Example 1, and a total of 10 groups of experiments were carried out, numbered 1-10.

[0046] The average particle size of the obtained nano powder material after ball milling is calculated, and the obtained results are as follows figure 2 as shown, figure 2 The new ball milling process represents the product particle size curve obtained by ball milling according to the method of Example 1, and the traditional ball milling process represents the product particle size curve obtained by ball milling according to the method of Comparative Example 1; figure 2 It can be seen that the quality of the nano-po...

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Abstract

The invention relates to the technical field of nano-powder materials, and provides a method for preparing nano-powder by ball milling. According to the method, a raw material is ground and stirred byusing grinding balls with different hardness in a ball milling process; the reaction activation energy can be obviously reduced; grains can be refined; the activity of the powder can be enhanced; thesintering capacity can be improved; finally, micro-raw material powder is crushed into the nano-powder; the obtained nano-powder is stable in quality, uniform in particle size and high in conglomeration rate, has high apparent density, can ensure smooth progress of subsequent forming and sintering processes of the nano-powder, and realizes continuous stable industrial production; and in addition;and the method provided by the invention does not require two-step ball milling, and is easy to operate and low in energy consumption.

Description

technical field [0001] The invention relates to the technical field of nanometer powder materials, in particular to a method for preparing nanoscale powder by ball milling. Background technique [0002] Ball milling is a common method for grinding materials and preparing fine powders. During the ball milling process, the balls in the ball mill impact and crush the raw material powders under the action of centrifugal force, and at the same time play a grinding role, so that the micron-sized powder ground into nanoscale powders. [0003] The traditional ball milling process requires long milling time and high energy consumption, and some raw materials will be over-milled, and the fineness of each milled powder is inconsistent, which is easy to cause the problem of large and uneven particle sizes of nano-powders, which will affect product quality. Serious impact. At present, the more advanced technology is to use two kinds of grinding balls with different diameters and sizes,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/20B02C17/18
CPCB02C17/18B02C17/20
Inventor 李喜峰袁雁妤彭聪张建华陈龙龙姜姝
Owner SHANGHAI UNIV
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