A kind of sample preparation method for measuring the dielectric constant of carbon black material

Abstract

The invention belongs to the technical field of preparation, and discloses a sample preparation method for measuring the dielectric constant of carbon black materials. The balance weighs 100.0g ± 0.5g of sliced ​​paraffin, adds it to a 250ml beaker, rapidly heats and melts it with an electric heating furnace, and weighs a certain proportion of the dried carbon black sample with an electronic balance with a sensitivity of 0.1g; Disperse the black sample; put the dispersed sample into the molding tool for casting and molding; separate the molded sample from the mold, and trim and shape. The molten paraffin and the carbon black material are mixed and cast and formed, which can solve the stability problem of the current test sample of the dielectric constant of the carbon black material, ensure the uniformity and compactness of the dispersion of the carbon black material, and make the dielectric constant of the carbon black material test sample. The stability is greatly improved, that is, the stability of the test results is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation, and in particular relates to a sample preparation method for measuring the dielectric constant of carbon black materials. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Carbon black is a kind of carbon material with very special microstructure, particle shape and surface properties. Carbon black material is a low-loss dielectric material with the characteristics of fluffy structure, low density and easy deformation under force. The electromagnetic parameters of carbon black materials are usually characterized by dielectric constant and magnetic permeability. Among them, carbon black materials have good dielectric loss properties (dielectric constant), but their magnetic properties (permeability) are very small, and the magnetic permeability is very small. The part is about 1 and the imaginary part is about 0. [00...

AI Technical Summary

Problems solved by technology

[0013] In summary, the problems in the prior art are: the main method of the existing carbon black material electromagnetic parameter test, the test result stability of the dielectric constant of the carbon black material in this method is relatively poor, and the reason is that the carbon black material test sample The reproducibility of the preparation is poor, which is caused by the physical characteristics of the carbon black material

The carbon black material has a fluffy structure, low density and is easy to deform, which leads to poor dispersion uniformity of carbon black in the test sample, and the stress in the sample preparation process will also cause uneven density of the sample

At the same time, the quality of the test sample does not exceed 0.1g, which requires high repetition of sample preparation, so there is a large difference between samples of the same batch

[0014] The existing carbon black material test sample preparation method has poor repeatability, and the prepared carbon black material has a fluffy structure, low density and easy deformation, and the carbon black dispersion uniformity is poor

[0015] Difficulty in solving the above technical problems: The difficulty in testing the stability of the dielectric constant of carbon black materials lies in the reproducibility of uniformly dispersed test samples

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