Detection method of aggregates in superfine powder
A technology of ultra-fine powder and detection method, which is applied in measuring devices, instruments, particle size analysis, etc., and can solve the problems of inability to characterize the shape, size and distribution of ultra-fine powder agglomerates.
Inactive Publication Date: 2017-05-10
ZHUZHOU HARD ALLOY GRP CO LTD
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Problems solved by technology
This method can be used to compare the agglomeration of ultrafine powders, but it cannot characterize the shape, size and distribution of ultrafine powder agglomerates
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Abstract
The invention discloses a detection method of aggregates in superfine powder. The method sequentially comprises the following steps: preparing a superfine powder sample through an acetone oscillation dispersion method; laying the sample into a scanning electron microscope, and observing the sample through a secondary electron imaging mode; observing the amplification of the aggregates, judging the types and shapes of the aggregate, and determining the sizes of the aggregates; making statistics of the quantity and the sizes of the aggregates; drawing a distribution relation graph between the sizes and the quantity of aggregate particles. The method solves the problems of preparation of superfine powder samples, observation, analysis and representation of aggregates, and has strong guide effect on production quality control and scientific study of superfine powder.
Description
Detection method of aggregates in ultrafine powder technical field The invention relates to the field of cemented carbide powder analysis, in particular to the analysis and detection of aggregates in ultrafine powders, especially the analysis and detection method for aggregates in ultrafine tungsten powder or ultrafine tungsten carbide powder. Background technique Due to the interconnection of ultrafine powders during the preparation, separation, and storage processes, multiple particles form larger particle clusters to form agglomeration phenomena. The agglomeration of ultrafine powder is divided into hard agglomeration and soft agglomeration. Soft agglomeration is caused by the van der Waals force and electrostatic attraction between molecules or atoms on the surface of ultrafine powder, which can be eliminated by powder ball milling. In addition to the Van der Waals force and electrostatic attraction between the particles, the ultrafine powder also has the effect of che...
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Login to View More IPC IPC(8): G01N15/02
CPCG01N15/0227
Inventor 周华堂谢晨辉彭宇谭立群张辉龙
Owner ZHUZHOU HARD ALLOY GRP CO LTD
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