Sampling quantification method for analyzing granularity of diamond micro-powder

A diamond powder and particle size analysis technology, which is applied in particle size analysis, particle and sedimentation analysis, sampling, etc., can solve problems that affect the accuracy and stability of analysis results, troublesome sampling methods, and deviations in analysis results, etc., and achieve diamond particle size analysis. Standardized sampling methods, improved sample preparation efficiency, and improved stability

Active Publication Date: 2016-08-17
CENT FOR QUALITY SUPERVISION & INSPECTION OF ARTIFICIAL DIAMOND POWDER IN HENAN PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, when the operator conducts particle size analysis, when preparing the analysis suspension, he must take multiple samples to configure the suspension containing the particle sample to be analyzed, until the concentration of the prepared suspension meets the analysis requirements, then the analysis can be performed. The process is time-consuming and labor-intensive, and because the concentration required by the instrument has a certain range, even the suspension prepared by multiple tests cannot guarantee the consistency of each concentration, and the difference in concentration will lead to deviations in the analysis results
Therefore, the current sampling method is cumbersome, cannot be quantified, and is not standardized, which affects the accuracy and stability of the analysis results.

Method used

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  • Sampling quantification method for analyzing granularity of diamond micro-powder
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  • Sampling quantification method for analyzing granularity of diamond micro-powder

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Embodiment 1

[0036] Taking M8 / 12 diamond powder as the reference sample, its average particle size is d 1 =(8+12) / 2=10μm, with the laser particle size analyzer as the analytical instrument, after many tests, it is determined that the optimal sampling amount is 0.2±0.01g, and the test is relatively stable, so the optimal sampling amount of the reference sample is 0.2±0.01g.

[0037] Three kinds of diamond powders, M2 / 4, M8 / 16, and M15 / 25, are taken as samples to be tested, and their average particle diameters are d 2(M2 / 4) =(2+4) / 2=3μm, d 2(M8 / 16) =(8+16) / 2=12 μm, d 2(M15 / 25) =(15+25) / 2=20μm, then according to the formula The optimal sampling volumes of the three samples were calculated respectively, as shown in Table 1. The three kinds of diamond micropowder samples taken out were respectively prepared as suspensions for laser particle size analyzer analysis, all of which were successful at the first time, all of which met the concentration requirements of instrumental analysis, and o...

Embodiment 2

[0046] Taking M8 / 12 diamond powder as the reference sample, its average particle size is d 1 =(8+12) / 2=10μm, using the resistance method particle size analyzer as the analytical instrument, after many tests, it is determined that the optimal sampling amount is 0.1±0.001g, and the test is relatively stable, so the optimal sampling amount of the reference sample It is 0.1±0.001g.

[0047] Take diamond powder M2 / 4, M8 / 16, M15 / 25 as the sample to be tested, and their average particle diameters are d 2 (M2 / 4) =(2+4) / 2=3μm, d 2(M8 / 16) =(8+16) / 2=12 μm, d 2(M15 / 25) =(15+25) / 2=20μm, then according to the formula The optimal sampling volumes of the three samples were calculated respectively, as shown in Table 3. The three kinds of diamond micropowder samples taken out were respectively prepared as suspensions for the analysis of the instrument resistance particle size analyzer, all of which were successful at the first time, and all met the concentration requirements of the instru...

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Abstract

The invention discloses a sampling quantification method for analyzing the granularity of diamond micro-powder. The method comprises the following steps: taking a diamond micro-powder reference sample with the average particle size of d1, and carrying out multi-time measurement through adopting a laser particle analyzer or a resistance particle analyzer to determine an optimum sampling amount m1 for the granularity analysis of the sample; and detecting a diamond micro-powder sample-to-be detected with the average particle size of d2 through adopting the same laser particle analyzer, determining an optimum sampling amount m2 for the granularity analysis of the sample-to-be-detected from the optimum sampling amount m1 of the diamond micro-powder reference sample according to the following formula: m2 = (m1*d2) / d1, and analyzing and detecting the granularity of the diamond micro-powder sample-to-be-detected. The sample be rapidly made through the formula determined by the method right the first time, so the sample making efficiency is greatly improved, sample making standards are standardized, and the accuracy and the stability of a test result are improved.

Description

technical field [0001] The invention belongs to the technical field of superhard material detection, and in particular relates to a method for analyzing, sampling and quantifying the particle size of diamond micropowder. technical background [0002] The particle size composition of diamond powder is an important technical index to measure product quality. At present, the analysis of particle size composition is usually carried out by laser particle size analyzer, resistance method particle size analyzer and other instruments. [0003] No matter which method is used in the analysis process, it is necessary to take a small amount of micropowder sample and add it to the dispersion medium (usually an aqueous solution) to form a suspension with a certain concentration before analysis. The concentration of the suspension should not be too large It can't be too small, too much or too little concentration will affect the measurement of the instrument. At present, when the operato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
CPCG01N15/02G01N15/0205G01N2001/1006
Inventor 梁晓冬张晓晨王敏张钰嵩陈洁周波王本龙
Owner CENT FOR QUALITY SUPERVISION & INSPECTION OF ARTIFICIAL DIAMOND POWDER IN HENAN PROVINCE
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