Complex permeability test sample preparation die and application method thereof

Abstract

The invention relates to a complex permeability test sample preparation die and an application method thereof, so as to solve the problem of low yield caused by the fact that various parts of an existing die are improperly coupled and difficult to disassemble and cause relative sliding easily. The invention provides the complex permeability test sample preparation die and the application method thereof. The die structurally comprises an upper cover plate, a middle ring, a bottom plate and a positioning shaft, wherein the upper cover plate and the bottom plate are both concave; a middle rod isarranged in the center of the upper cover plate; the groove surface of the upper cover plate is opposite to that of the bottom plate; and the upper cover plate and the bottom plate clamp and fix the middle ring. The application method comprises steps of installation, filling, heating, disassembling of the die and sample treatment. The die and the application method which are provided by the invention have the advantages that the thickness of a prepared sample is controllable, an error is small, the sample is easy to take out from the die, and the sample preparation time of the die is saved.

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 permeability of materials. Background technique [0002] The sample for complex permeability testing has 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 the complex permeability is inorganic powder. The sample preparation of inorganic powder is to add an appropriate amount of powder to the mold, and then apply a certain pressure to prepare the sample. At present, the structure of the inorganic powder sample mold is relatively simple, and the traditional sample preparation mold can not accurately control the thickness of the sample. Therefore, the thickness of the sample needs to be tested after the sample preparation is completed, wh...

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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