溶液生长法制备多针状氧化锌及其吸波性能的研究

Research on Solution Growth for Preparation and Electromagnetic Wave Absorption Performance of Needle Stick-ZnO

以硝酸锌和六亚甲基四胺为反应试剂,在80℃溶液体系中生长合成了多针状ZnO粒子。利用X射线粉末衍射和扫描电子显微镜对反应1 h、2 h和6 h后产物的结构和形貌进行了表征,研究了溶液法中多针状氧化锌的生长机理。结果表明:反应6 h后,获得的ZnO粒子结晶完整,纯度较高;直径分布于500~800 nm,长度达到8~10μm;使用同轴法对复介电常数和复磁导率进行了测试并模拟吸波性能曲线,在0~18 GHz范围内,石蜡基多针状氧化具有较强电磁波吸收能力,具有一定宽度吸波频段,衰减-10 dB以下的频率跨度为6 GHz左右,在10.5 GHz频率下微波衰减值达到最大值达-29.2 dB。

ZnO particles were synthesized in a 80 ℃ solution system using Zn(NO3)2 and C6H12N4 as reagents. The structure and morphology of the product which come from different response time(1 h,2 h and 6 h) were investigated by X-ray powder diffraction and scanning electron microscopy. The growth mechanism of Needle Stick-ZnO prepared by solution growth. The results showed that the integrity crystalline ZnO particles of high purity were obtained after reacting 6 hours, which with diameter of about 500 nm, length of 8 ~ 10 μm. Using the coaxial method to complete the complex permittivity and permeability test and simulate the microwave absorbing properties of composite materials. During the range of 0 ~ 18 GHz, the composite material has a strong absorption of electromagnetic waves, band of the radar absorbing was wide, the frequency span of microwave attenuation values below-10 dB was about 6 GHz. The microwave attenuation values reached a maximum value of up to-29.2 dB at the frequency of 10.5 GHz.