结构参数对不锈钢织物透光与电磁屏蔽的影响OA北大核心CSTPCD

Aiming at the contradiction between the inherent light transmittance and shielding efficiency of stainless steel fabrics,the study explored how to achieve the two-dimensional goal of compatibility between light transmittance and electromagnetic shielding performance,and studied the influence of the main structural parameters(wire diameter and wire spacing)of the stainless steel mesh on the light transmittance and shielding efficiency,in order to optimize the stainless steel fabrics with high light transmittance and strong shielding efficiency,and to provide military reference for the field of electromagnetic shielding materials.Through the design of the main structural parameters of stainless steel fabrics,the study analyzed the influence on the light transmittance and electromagnetic shielding performance of stainless steel fabrics,and analyzed the electromagnetic diffraction phenomenon of stainless steel fabrics with different structural parameters through the scalar diffraction theory.TOPSIS evaluation method was used to quantify the comprehensive performance of stainless steel fabrics in light transmission and electromagnetic shielding,and the influence of wire diameter and wire spacing of stainless steel fabrics on it was studied.Due to the existence of electromagnetic diffraction,the influence of structural parameters on the light transmission and shielding performance shows a nonlinear law,and with the increase of light transmission,the wire diameter decreases sharply to a fixed level,while the wire spacing increases significantly;similarly,with the improvement of the shielding efficiency,the wire diameter increases to a certain level,while the wire spacing decreases to a fixed level. Therefore,under the condition of ensuring high light transmittance,the smaller the wire diameter and wire spacing of the stainless steel fabric,the higher-order diffraction through the electromagnetic wave will be greatly suppressed,so that the light transmittance and electromagnetic shielding performance can be improved to a certain extent,and the comprehensive performance improvement effect is good.It can be seen through the analysis of polar deviation,the R value of wire spacing on light transmittance,electromagnetic shielding performance and comprehensive performance is greater than that of the wire diameter,indicating that this factor has the closest influence on the performance indexes of stainless steel fabrics.According to the analysis of the evaluation factor Q,it can be determined that when the light transmission rate is in the range of 0.02-0.05 mm,the wire diameter is in the range of 0.4-1.2 mm;to ensure that the shielding efficiency is more than 40dB,the wire diameter of stainless steel mesh is in the range of 0.02-1.2 mm,and the wire spacing is in the range of 0.2-1.0 mm.Therefore,in order to be compatible with the high light transmittance(more than 90%)and strong shielding performance(more than 40 dB)of stainless steel fabrics,the wire diameter of stainless steel fabrics can be set in the range of 0.02-0.05 mm,and the wire spacing can be set in the range of 0.4-1.0 mm. In summary,the stainless steel fabrics'wire diameter and wire spacing on the light transmission performance and electromagnetic shielding performance cannot be ignored,and the change of wire spacing on the performance of the impact is more closely.Due to the existence of electromagnetic diffraction,there exists a non-linear relationship between the wire spacing and light transmission performance as well as electromagnetic shielding performance,and the overall structure is more precise.As a result,the comprehensive performance is improved.In order to achieve the goal of high transmittance electromagnetic shielding,stainless steel fabrics'wire diameter and wire spacing should be designed to be as small as possible under the premise of ensuring light transmittance,so that the shielding efficiency can be greatly improved under the premise of high light transmittance.This discovery provides theoretical support for the structural design of high transmittance electromagnetic shielding materials.Nevertheless,the design of structural parameters is relatively limited due to the production constraints and weaving difficulties of stainless steel wires,and in-depth research is needed in the preparation of pure stainless steel wire electromagnetic shielding fabrics.