A sample preparation mold for complex magnetic permeability test and its application method

Abstract

The invention relates to a complex magnetic permeability test sample preparation mold and an application method, so as to solve the problems of improper matching of various parts of the existing mold, difficult disassembly, and relative sliding easily leading to low yields. The complex magnetic permeability provided by the invention Conductivity test sample preparation mold and application method. The mold structure includes an upper cover plate, an intermediate ring, a bottom plate, and a positioning shaft. The upper cover plate and the bottom plate are both concave. The grooves of the bottom plate are opposite to each other, the upper cover plate and the bottom plate clamp and fix the intermediate ring, and the application method steps include installation, filling, heating, disassembling the mold, and sample processing. The error is small, the sample is easy to take out from the mold, and the advantage of saving mold sample preparation time.

Description

technical field [0001] The invention relates to a device for testing the electromagnetic properties of materials, in particular to a sample preparation mold for testing the complex magnetic permeability of materials. Background technique [0002] The samples for complex magnetic permeability test have special structural size requirements, the specific requirements are: outer diameter < 8mm, inner diameter > 3.1mm, thickness < 5mm (generally 2-3mm), shape: circular ring. [0003] Generally, the material for testing complex magnetic permeability is inorganic powder. The sample preparation of inorganic powder is to add an appropriate amount of powder into a mold, and then apply a certain pressure to prepare a sample. At present, the structure of the inorganic powder sample mold is relatively simple, and the traditional sample preparation mold cannot accurately control the thickness of the sample. Therefore, the thickness of the sample needs to be tested after the sampl...

AI Technical Summary

Problems solved by technology

At present, the structure of the inorganic powder sample mold is relatively simple, and the traditional sample preparation mold cannot accurately control the thickness of the sample. Therefore, the thickness of the sample needs to be tested after the sample preparation is completed, which increases the steps of the material complex permeability test.

[0004] In addition, conventional inorganic powder sample preparation molds cannot be used for sample preparation of granular polymer-inorganic composite materials, because the sample preparation of granular polymer-inorganic composite materials requires heating and pressure. , and then exert a certain pressure on the composite material melt, and discharge the excess composite material melt from a certain position of the mold, while the defect of the conventional sample preparation mold is that there is no residual material discharge structure

Moreover, the conventional sample preparation mold is cold-pressed, so after a certain pressure is applied to the mold, the mold is easy to open to take out the sample, and after the composite material is heated and cooled, the composite material and the mold are firmly bonded, and the mold is not easy to open, so it is necessary to design Special structure to facilitate the opening of the mold to take out the sample

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