A kind of preparation method of nanoscale diamond powder with narrow particle size distribution

A technology of diamond micropowder and narrow particle size distribution, which is applied in the direction of diamond, metal processing equipment, manufacturing tools, etc., can solve the problems of easy introduction of impurities and low shaping efficiency, achieve high material removal rate, improve shaping efficiency, and shorten shaping time. Effect

Active Publication Date: 2019-01-18
HENAN UNION ABRASIVES
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a method for preparing nanoscale diamond powder with narrow particle size distribution, so as to solve the problems of easy introduction of impurities and low shaping efficiency in the preparation of existing ultrafine diamond powder

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of nanoscale diamond powder with narrow particle size distribution
  • A kind of preparation method of nanoscale diamond powder with narrow particle size distribution
  • A kind of preparation method of nanoscale diamond powder with narrow particle size distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of the nanoscale diamond micropowder of the narrow particle size distribution of the present embodiment, the steps are as follows:

[0038] 1) Take 500 g of ultrafine diamond powder with a median particle size (D50) of 100 nm, disperse it in 8000 ml of deionized water, add 2 g of sodium dodecylbenzenesulfonate, 1.5 g of triethanolamine, and disperse it ultrasonically for 30 minutes to obtain a raw material slurry ;

[0039] 2) Put the raw material slurry into a vertical sand mill with a grinding cylinder volume of 10,000ml, add 10kg of coarse-grained raw sawing grade diamond (Zhongnan Diamond Co., Ltd., 2290 series, specification 16 / 20), and start the sand mill. Grinding and shaping, adjust the linear speed of the grinding disc of the sand mill to 12m / s or the rotating speed at 900-950rpm, run for 6h, release the slurry and filter the mixed coarse-grained grinding medium with a 120 mesh screen to obtain the shaping slurry;

[0040] 3) Centrifuge ...

Embodiment 2

[0043] The preparation method of the nanoscale diamond micropowder of the narrow particle size distribution of the present embodiment, the steps are as follows:

[0044] 1) Take 5000g of ultrafine diamond powder with a median particle size (D50) of 100nm, disperse it in 80000ml of deionized water, add 20g of sodium dodecylbenzenesulfonate, 15g of triethanolamine, and ultrasonically disperse for 30min to obtain a raw material slurry;

[0045] 2) Add the raw material slurry into the external circulation turnover barrel connected with the sand mill, and add 30 kg of coarse-grained primary sawing grade diamond to the vertical sand mill with a grinding cylinder volume of 30000 ml (Zhongnan Diamond Co., Ltd., 2290 series, specification 16 / 20), turn on the diaphragm pump to pump the raw material slurry into the feed inlet of the lower part of the sand mill, adjust the diaphragm pump to make the slurry circulate between the sand mill and the turnover barrel at a flow rate of 4000ml / min...

Embodiment 3

[0049] The preparation method of the nanoscale diamond micropowder of the narrow particle size distribution of the present embodiment, the steps are as follows:

[0050] 1) Take 500 g of ultrafine diamond powder with a median particle size (D50) of 200 nm, disperse it in 6000 ml of deionized water, add 2 g of sodium hexametaphosphate, 1 g of isopropanol, and ultrasonically disperse for 30 minutes to obtain a raw material slurry;

[0051] 2) Put the raw material slurry into a vertical sand mill with a grinding cylinder volume of 10000ml, add 10kg of coarse-grained primary sawing grade diamond (Henan Huanghe Cyclone Co., Ltd., HSD series, specification 18 / 20), and start the sand mill Start grinding and shaping, adjust the linear speed of the grinding disc of the sand mill to 8m / s, run for 6h, release the slurry and filter the mixed coarse-grained grinding medium with a 120 mesh screen to obtain the shaping slurry;

[0052] 3) Centrifuge and dehydrate the shaping slurry obtained ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
velocityaaaaaaaaaa
surface roughnessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of nanoscale diamond micropowder narrow in particle size distribution. The preparation method includes: 1), mixing diamond micropowder with median particle size below 0.3um with water to obtain raw material slurry; 2), adding ultra-hard abrasive particles serving as a grinding medium into the raw material slurry for grinding and shaping, and filtering to obtain shaped slurry, wherein particle size of the grinding medium is larger than that of the diamond micropowder in the step 1); 3), grading the shaped slurry obtained in the step 2) to obtain the nanoscale diamond micropowder. The ultra-hard abrasive particles thicker than the diamond micropowder in particle size and used as the grinding medium and are high in strength, the grinding medium is more effective in friction, collision and shearing when compared with steel balls undergoing contact and collision shaping only on contact points, so that shaping efficiency is improved, and obtaining of nanoscale diamond micropowder products which are regular in shape and high in particle size concentration is facilitated.

Description

technical field [0001] The invention belongs to the field of superhard abrasives, and in particular relates to a preparation method of nano-scale diamond powder with narrow particle size distribution. Background technique [0002] Diamond micropowder is made of artificial diamond as raw material through crushing, shaping, purification, grading, drying and other processes. According to the size of the product, it is widely used in different fields such as cutting, grinding and polishing. [0003] Due to the high efficiency brought about by the high hardness of diamond, fine-grained diamond micropowder used to be the best choice for many companies in the polishing field, but with the advancement of technology, especially the rapid development of electronic information technology, the requirements for the surface finish of materials after polishing Higher and higher, the selected diamond powder is becoming more and more ultra-fine-grained. For example, in the early polishing of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/28B24B31/00
CPCB24B31/00C01P2004/03C01P2004/52C01P2004/62C01P2004/64
Inventor 陶刚汪静
Owner HENAN UNION ABRASIVES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap