Method for measuring density of microsphere and surface coating thereof

Abstract

The invention discloses a method for measuring the density of microspheres and surface coating thereof, belonging to the technical field of microsphere measurement. The method comprises the following steps: B, pouring the microspheres to be measured into a sample introduction tank, and recording the number of the microspheres to be measured; C, making the microspheres to be measured enter a falling device from the sample introduction tank, and collecting the dynamic images of the falling microspheres to be measured; D, sieving the images of the microspheres to be measured; E, calculating the mass of the single microsphere to be measured according to the total mass and number of the microspheres to be measured, and calculating the volume of the single microsphere to be measured according to the sieved images of the microspheres to be measured; F, coating the surfaces of the microspheres to be measured to obtain coated microspheres, and subjecting the coated microspheres to operation from the step B to the step E repeatedly to obtain the mass and the volume of the coated microspheres; and G, calculating the density of the microspheres and the surface coating thereof. The method is easy to operate with less people involved and can be used for rapidly and precisely measuring the density of the microspheres and the surface coating thereof without causing pollution.

Description

technical field [0001] The invention relates to the technical field of microsphere measurement, in particular to a method for measuring the density of a microsphere and its surface coating. Background technique [0002] Density is one of the important indicators of the physical properties of materials. For microspheres with a surface coating, the density of the microspheres and the density of the surface coating directly affect their properties and applications. [0003] The structure of the spherical fuel element used in the pebble bed high temperature gas-cooled reactor in my country is spherical coated particles (TRISO) dispersed in the graphite matrix of the fuel zone. The core of the coated particle is UO 2 Ceramic Microspheres, at UO 2 Three pyrolytic carbon (PyC) layers and a silicon carbide layer are thermally deposited on the core, where UO 2 The main functions of the core are: ① nuclear fission occurs to generate nuclear energy; ② retains a part of radioactive f...

AI Technical Summary

Problems solved by technology

The problem of this method is the introduction of more human factors, low efficiency, heavy measurement workload, and it is difficult to achieve online rapid measurement

[0009] Mercury porosimetry is used to test the volume of coated microspheres. This method can greatly increase the test speed, test a wide range of samples, have no special requirements on the shape of the sample, and have a large number of samples, which is representative. However, its operating conditions are harsh and radioactive The treatment and recovery of samples and mercury are difficult and easy to cause pollution

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