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激光烧蚀对石英/环氧透波材料电性能的影响

Effects of Laser Ablation on Electrical Properties of Quartz Fiber/Epoxy Wave-Transmitting Material

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摘要

为获取高密度热流烧蚀对石英/环氧透波材料电性能的影响机理, 利用连续激光作为加载源开展了烧蚀实验, 对材料的介电常数进行测试; 通过环氧树脂、石英纤维的TG-DSC分析, 得到了石英/环氧透波材料的热损伤演化过程; 利用透射红外光谱法、X射线衍射法测试激光烧蚀后材料表面的红外吸收光谱和晶态物质, 并结合扫描电镜观察了材料表面的烧蚀形貌。结果表明:在7~17 GHz激光频率下进行烧蚀后, 材料的介电常数约为4.5, 较烧蚀前增大了近50%; 激光烧蚀导致材料的介电常数增大, 这是由于激光烧蚀使环氧树脂发生热分解、裂解, 在其表面原位生成了具有导电能力和呈岛链状分布的石墨化碳所致; 激光烧蚀造成材料表面粗糙、疏松, 使得材料对电磁波的反射、散射作用增强, 对电磁波的透射能力减弱。

Abstract

In order to obtain the mechanism of laser ablation on the electrical properties of quartz fiber/epoxy wave-transmitting material under high density heat flux condition, we utilize continuous laser as heat loading source to carry out laser ablation, and test the dielectric constant of the material. The thermal damage evolution behaviors of quartz fiber/epoxy wave-transmitting material are obtained by the TG-DSC analysis of epoxy resin and quartz fiber. The infrared absorption spectrum and the crystalline material of ablation product on material after laser ablation are tested by transmission infrared spectroscopy and X ray diffraction, and the ablation morphology of the material is observed by scanning electron microscopy. The test results show that, after laser ablation at laser frequency of 7-17 GHz, the dielectric constant of the material dielectric constant is about 4.5, which is nearly 50% higher than before ablation. The laser irradiation makes the epoxy resin thermal decomposition and cracking, the graphite with conductive ability and chain state forms on material. At the same time, because of the rough and loose surface of the material, its reflection and scattering abilities on electromagnetic wave are enhanced, and the transmission capability is weakened.

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中图分类号:TN249

DOI:10.3788/cjl201845.1002005

所属栏目:激光制造

收稿日期:2018-04-04

修改稿日期:2018-05-17

网络出版日期:2018-05-25

作者单位    点击查看

张永强:中国工程物理研究院流体物理研究所, 四川 绵阳 621900
张黎:中国工程物理研究院流体物理研究所, 四川 绵阳 621900
陶彦辉:中国工程物理研究院流体物理研究所, 四川 绵阳 621900
谭福利:中国工程物理研究院流体物理研究所, 四川 绵阳 621900

联系人作者:张永强(minizhang_0804@163.com)

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引用该论文

Zhang Yongqiang,Zhang Li,Tao Yanhui,Tan Fuli. Effects of Laser Ablation on Electrical Properties of Quartz Fiber/Epoxy Wave-Transmitting Material[J]. Chinese Journal of Lasers, 2018, 45(10): 1002005

张永强,张黎,陶彦辉,谭福利. 激光烧蚀对石英/环氧透波材料电性能的影响[J]. 中国激光, 2018, 45(10): 1002005

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