Quartz fibre strengthen bis maleimide bmi composite material have low to dielectric loss angle , able to bear high temperature , damp and hot , good mechanics performance 石英纤维增强双马来酰亚胺树脂复合材料具有低介电损耗、耐高温、耐湿热及良好的力学性能。
Quartz fibre strengthen bis maleimide bmi composite material have low to dielectric loss angle , able to bear high temperature , damp and hot , good mechanics performance 摘要石英纤维增强双马来酰亚胺树脂复合材料具有低介电损耗、耐高温、耐湿热及良好的力学性能。
With increasing of mno2 content , the dielectric constant increased gradually at first , then decreased with more mno2 content , and the dielectric loss greatly decreased and resistivity increased clearly 均为钙钛矿结构，前者能够明显降低pwi pt陶瓷的介电损耗，后者能够明显提高陶瓷样品的致密度。
The requirement of wide - range frequency and low loss tangent characters materials for advanced radomes were presented , and the progress in the research of polymer - matrix composites for radomes is summarized 摘要介绍了先进雷达罩对罩体材料宽频、低介电损耗值等电性能的要求，并综述了用于雷达罩的聚合物基复合材料的研究进展。
The dielectric constant of mullite - si / c / n composite reduces obviously with the increasing of frequency , and its tg5 is quite high , so it is a possible candidate as the absorber layer of high temperature radar absorbing materials 莫来石- si c n复合材料有明显的频散效应和较大的介电损耗角正切，可以作为高温吸波材料的吸收层。
Considering the influence of dielectric constant , conductivity , and dielectric loss on electrorheological ( er ) effects , an effective approach to prepare supramolecular complex er materials was proposed by self - assembly 根据介电极化理论，从电流变液材料物理设计的介电常数、电导率和介电损耗等参数出发，采用分子自组装方法，制备出超分子配合物新型电流变液材料。
32 ghz to 1 . 91ghz . the complex permittivity peak of nanometer siox and two dielectric losses of cnts are discovered in our experiment which are different from properties of other nanometer materials . we should do the further research to reveal the truth 在本实验的工作中发现与其它纳米材料不同的现象，纳米氧化硅的介电常数出现峰值，碳纳米管有两个介电损耗峰，建议以后的工作对其原因进行分析。
Investigation of electro - magnetic parameters shows that nanometer siox , cb and cnts are dielectric loss materials , " of cb decreases and " and tg8 of cb are largely improved when a little quantity of nanometer siox is added to cb . 2 通过对材料的电磁参数的研究，结果表明纳米氧化硅、乙炔碳黑及碳纳米管均为介电损耗型材料，少量的纳米氧化硅能够降低乙炔碳黑介电常数的实部，大幅度提高乙炔碳黑介电常数的虚部和介电损耗。
The dielectric constant of pani - mmt nanocomposite was increased 5 . 5 times that of pani and 2 . 7 times that of mmt , besides , the conductivity of pani - mmt particle was increased about 10 times that of pani at 1000 hz and 20 . meanwhile , the dielectric loss tangent can also be increased about 1 . 7 times that of pani 在1000hz 、 20时，其介电常数比蒙脱土提高了约2 . 0倍，比聚邻苯二胺提高了近4 . 3倍，同时介电损耗也有一定的提高。
Along with the doping content increases , the dielectric constant initially increased and then decreased . the dielectric loss was on the contrary . 4 . bt _ 4 doped with bi _ 2o _ 3 or v2o5 got a lower sintering temperature . a babi4ti4o15 phase raised when bi _ 2o _ 3 was doped and the dielectric properties ruined 3 . bst中掺杂zro _ 2 ,晶粒尺寸增大,掺杂量较大时会产生第二相bazro _ 3 ,介电常数随掺杂量的增大呈现先增大后减小的趋势,介电损耗则先减小后增大。
