Measurement method for particle size

A measurement method and particle size technology, which is applied in the field of high-temperature gas-cooled reactor fuel element manufacturing, can solve problems such as low efficiency, and achieve the effects of high measurement accuracy, large measurement sample volume, and fast measurement speed

Inactive Publication Date: 2011-11-23
TSINGHUA UNIV
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This method introduces uncertain

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  • Measurement method for particle size
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[0030] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In order to solve the problems of cumbersome sample preparation, low test efficiency, single measurement parameter, and introduction of human error in the prior art, the purpose of the present invention is to provide a UO with simple operation, high test efficiency, and the ability to measure multiple parameters. 2 Core or clad granules and other powder or granule sizing methods. to UO 2 Taking the core as an example, the measurement method includes the following steps:

[0032] S1. Sample injection process:

[0033] a) Take a sample of about 1-20g, use a solvent (the solvent must not react with the sample, and the sample must be insoluble in the solvent) to ultraso...

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Abstract

The invention discloses a measurement method for particle size, and relates to the technical field of high temperature gas cooled reactor fuel element preparing. The method comprises the following steps that: S1, particles requiring measurements are poured into a sample injector to be dispersed, then the particles requiring measurements enter a falling apparatus; S2, the particles requiring measurements enter a test area through the falling apparatus, followed by carrying out dynamic image acquisition for the particles during falling; S3, the acquired images are processed to obtain the size information of the particles requiring measurements. With adopting the method provided by the present invention to carry out the particle size measuring, the size information of different angles of the particles or the powders can be obtained through regulating image acquisition frequencies and carrying out repetitive measurements, such that the amount of the measured samples is large, and the measurement speed is quick. In addition, because the scope of the screen conditions is set to remove influence due to dust, the powders having no single dispersion state and the particles having no single dispersion state, the measurement accuracy is high.

Description

technical field [0001] The present invention relates to the technical field of manufacturing high temperature gas-cooled reactor fuel elements, in particular to a measurement method for detecting powder or particle size information, in particular to the particle size, The detection method of grain shape and other technical indicators. Background technique [0002] Particle size and particle shape are one of the important indicators of powders and granules, which directly affect their properties and applications. [0003] The core of the modular high-temperature gas-cooled reactor is equipped with spherical fuel elements with a diameter of 6cm. In each spherical fuel element, more than 8000-16000 coated fuel particles are dispersed in the graphite matrix material. The coated fuel particles are made of multi-layer Materials such as pyrolytic carbon and SiC are coated on UO 2 made on microspheres. The diameter of the core and the thickness of each layer of coated fuel partic...

Claims

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Application Information

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IPC IPC(8): G01N15/00G01N15/02
Inventor 张凯红赵宏生刘小雪李自强唐春和
Owner TSINGHUA UNIV
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