论文部分内容阅读
采用均匀沉淀方法制备了不同的活性炭/纳米氧化锌复合物,并利用扫描电子显微镜(SEM)、X光衍射分析(XRD)以及热失重分析(TGA)手段对复合物进行了表征,并进一步测量了不同复合物的环氧树脂复合材料在特定频率范围内的介电和吸波性能。研究结果表明:所得复合物中的纳米氧化锌属于六方晶系的氧化锌,纯度较高,重量百含量为50%;热分解温度对氧化锌的形貌有显著影响,200℃时为片状,300℃是为球状,400℃和500℃时为球状为主伴随少量片状形貌;与其他形貌相比,200℃下形成的片状氧化锌具有最高的介电损耗和最好的吸波性能。
Different activated carbon / nano-ZnO composites were prepared by homogeneous precipitation method. The composites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA) Dielectric and Microwave Absorbing Properties of Epoxy Composites with Different Composites over Specific Frequencies. The results show that the nano-zinc oxide in the obtained composite is hexagonal zinc oxide with a high purity and a weight percentage of 50%. The thermal decomposition temperature has a significant effect on the morphology of the zinc oxide, and is flaky at 200 ° C. , Spherical at 300 ℃, spherical at 400 ℃ and 500 ℃, with a small amount of flake morphology. Compared with other morphologies, the flaky zinc oxide formed at 200 ℃ has the highest dielectric loss and the best Wave absorption performance.