摘要
Abstract
For studying the electrical and mechanical properties of 3D composites,three kinds of 3D composites were prepared via vacuum assistant resin infusion process (VARI).Their permittivity (εr) and loss angle tangent (tanδ) were tested by resonance cavity perturbation method.In addition,their transmission coefficient,flatwise tension strength and flatwise compression properties were investigated.The results of experiments have shown that with the increase of thickness,the εr and tanδ decrease.The permittivity of 5 mm,6 mm and 8 mm are 1.93,1.77 and 1.62,and the loss angle tangent of 5 mm,6 mm and 8 mm are 0.0083,0.0078 and 0.0065.Besides,their transmission coefficients are all below 0.2 dB between 1 GHz and 12 GHz.What's more,the results indicate that the compression strengths of the 5 mm,6 mm and 8 mm are 5.8 MPa,4.6 MPa and 3.8 MPa,respectively.The flatwise tension strengths of the 5 mm,6 mm and 8 mm are 7.8 MPa,6.4 MPa and 5.2 MPa,respectively,which indicates that the 3D composites have excellent mechanical properties.关键词
三维中空复合材料/介电常数/损耗角正切值/平拉强度/平拉强度Key words
3D composite/permittivity/loss angle tangent/compression strength/flatwise tension strength分类
通用工业技术
