Ni-Co合金包覆空心微珠及其吸波性能

通过对粉煤灰空心微珠化学镀镍钴合金研究了其电磁特性.微珠表面金属化通过三步化学镀完成.扫描电镜和能谱分析表明镍钴合金被均匀地施镀到了微珠表面.微波吸收性测试能通过把金属化的微珠掺入石蜡完成.由于镍钴合金的作用,镀后微珠具备了高的介电特性.一系列实验表明化学镀镍钴合金的中空微珠是一类微波吸收剂.随着化学镀镍钴合金的中空微珠涂料厚度的增加,微波吸收峰向低频迁移.

Microwave absorbing properties of Ni-Co coating of fly-ash hollow microspheres

Electroless Ni-Co alloy thin films on fly-ash hollow microspberes was employed to study it electromagnetic properties. Metal plating was carried out in a three step electroless plating process. The results of SEM and EDS analysis indicate that Ni-Co could be plated on the surface of cenospheres comparatively homogenous. Microwave absorbing properties were determined in the olefin composites containing the metal-coated microspberes. Due to the conductive behavior of Ni-Co alloy thin films, high dielectric can he obtained in microwave frequencies. A number of experiments show that electroless Ni-Co alloy thin films on fly-ash hollow microspheres is a kind of microwave absorbent . With the increasing of the electroless Ni-Co alloy thin films on fly-ash hollow microspheres coat thickness, the absorbing peak value of the composite shifts to lower frequency.