空心微珠表面改性及其吸波特性

Surface Modification on Cenospheres and Its Wave Absorbing Properties

通过CVD方法在空心微珠表面进行金属化改性,用扫描电镜对空心微珠表面镀铁的微观形貌和成分进行了观察、测定,结果表明铁较均匀附着在微珠的表面.分别将改性前后的空心微珠制备成吸波材料,测试其吸波性能.测试结果表明,改性后的空心微珠具有较好的吸波性能.在8～18GHz扫频测试范围内,小于-10dB的频段范围在17.2～18GHz,最大吸收可达-11.27dB,对应的频率为18GHz.空心微珠的表面改性为其再利用找到有效的途径.

The magnetic film plating on the surface of cenospheres was studied by chemical vapor deposition method. The results of SEM and EDAX analysis indicated that iron could be plated on the surface of cenospheres comparatively homogenous. Absorbing materials made of modified cenospheres were prepared and tested. The modified cenospheres exhibited excellent wave absorbing properties at the testing frequency range from 8 GHz to 18 GHz, the reflectivity was below -10 dB at the frequency range from 17.2 GHz to 18 GHz and the lowest reflectivity was -11.27 dB at 18 GHz.