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为了使钡铁氧体粉末具有红外-微波多波段兼容的隐身性能,采用表面改性的方法在钡铁氧体表面进行Ni-Co-P复合化学镀。借助XRD、SEM、EDX、IR-2双波段发射率测量仪、矢量网络分析仪对包覆前后样品的结构、表面形貌、红外发射率、微波吸收性能进行了表征。结果表明,在钡铁氧体表面包覆的Ni-Co-P合金呈球状,包覆比较均匀;在钡铁氧体粒子上镍钴磷固熔体质量分数约为84.14%,其中镍为51.93%,钴为25.78%,磷为6.43%;镀后样品的红外发射率降至0.6160,对电磁波的反射率小于10dB的频带可达3.6GHz(在8～11.6GHz范围内)。本实验制备的钡铁氧体复合粒子有望成为一种极具发展潜力和工业价值的红外-微波一体化隐身材料。
In order to make the barium ferrite powder have the multi-band infrared-microwave compatible stealth performance, surface modification of the barium ferrite surface Ni-Co-P composite electroless plating. The structure, surface morphology, infrared emissivity and microwave absorption of the sample before and after coating were characterized by XRD, SEM, EDX, IR-2 dual band emissivity measuring instrument and vector network analyzer. The results show that the Ni-Co-P alloy coated on the surface of barium ferrite is spherical and uniformly coated. The mass fraction of Ni, Co and P solid solution on barium ferrite is about 84.14%, of which nickel is 51.93 %, Cobalt is 25.78% and phosphorus is 6.43%. The infrared emissivity of the sample after plating is reduced to 0.6160 and the frequency of the electromagnetic wave whose reflectance is less than 10dB can reach 3.6GHz (in the range of 8 ~ 11.6GHz). The barium ferrite composite particles prepared in this experiment is expected to become an infrared-microwave integrated stealth material with great potential and industrial value.