A rapid detection method for the magnetic permeability of microwave-absorbing powder
A detection method and magnetic permeability technology are applied in the field of rapid detection of the magnetic permeability of wave absorbing powder, which can solve the problems of complex calculation process, high sample requirements and low detection accuracy, and achieve simple calculation process, low processing accuracy requirements, The effect of high detection efficiency
Active Publication Date: 2022-06-28
苏州超弦新材料有限公司
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Problems solved by technology
[0008] The purpose of the present invention is to solve the shortcomings of high cost, low detection accuracy, complex calculation process and high sample requirements in the prior art, and propose a rapid detection method for the magnetic permeability of wave-absorbing powder
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Embodiment 1
[0041] Embodiment 1, a method for rapid detection of the magnetic permeability of a wave-absorbing powder, comprising the following steps:
[0042] S1. Formula: weigh 100g of absorbing powder, 18g of PU glue, 120g of solvent, 2g of crosslinking agent, 1g of accelerator and 1g of wetting agent;
[0043] S2, stirring: put the materials in step S1 into the planetary mixer for high-speed mixing for 60 minutes to obtain slurry, take out the slurry and pour it into a beaker for use;
[0044] S3, coating: use the blade coating method to coat the slurry on the PET film to obtain a coating film with a thickness of 0.2 mm of the wave-absorbing film;
[0045] S4, drying: put the coating film into the drying equipment and bake for 40min, and obtain the coating dry film after it is completely dried;
[0046] S5, pressing: cutting the coated dry film obtained in step S4 to obtain a standard dry film, and pressing the standard dry film on a flat press for 60s at high temperature to obtain a...
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Abstract
The present invention relates to the technical field of detection of wave-absorbing materials, in particular to a method for quickly detecting the magnetic permeability of wave-absorbing powder, comprising the following steps: S1, weighing wave-absorbing powder, PU glue, solvent, cross-linking agent, accelerator and moistening Wet agent; S2, put it into the planetary mixer and mix it at high speed; S3, coat the slurry on the PET film; S4, put it into the drying equipment for baking; S5, press it on the flat press; S6, press it The product is cut to obtain a magnetic sheet sample; S7, record the inductance value L 0 , the magnetic sheet sample is placed in an epoxy resin box to record the inductance value L; S8, calculation: through simulation calculation and coefficient correction, u' and L, L are obtained 0 Semi-quantitative relationship; the size of the sample required by the test method in the present invention is small, the requirements for the sample are low, the detection accuracy is high, the measurement frequency band is wide, the sample consumption is small, and the processing accuracy of the sample is low, and there is no limit The base material of thin film materials is beneficial to the research, application and non-destructive testing of thin film materials.
Description
technical field [0001] The invention relates to the technical field of wave absorbing material detection, in particular to a method for rapid detection of the magnetic permeability of wave absorbing powder. Background technique [0002] In recent years, electronic device technology has developed vigorously, and this has also made the material characteristics of electronic components a key factor in determining circuit characteristics. For example, in the manufacture of high-capacity multilayer ceramic chip capacitors (MLCCs) commonly used in digital (media) devices, high-k (dielectric constant) materials must be used. In addition, various electrical performance verifications, such as frequency and temperature response, must be performed prior to material selection. The most important electromagnetic parameter of the absorbing material is the magnetic spectrum, that is, the complex permeability-frequency curve, which needs to be tested with the Agilent E4991A impedance analy...
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IPC IPC(8): G01R33/12G01R27/26
CPCG01R33/1223G01R27/26
Inventor 曹珺赵栋白江博
Owner 苏州超弦新材料有限公司