钡铁氧体表面化学镀Ni-P合金的制备及性能

Preparation and properties of electroless Ni-P coated barium ferrite powders

摘要:

为提高钡铁氧体的吸波性能,以钡铁氧体为芯材,采用化学镀的方法制备表面包覆Ni-P镀层的钡铁氧体复合粒子.并利用XRD、SEM、EDS及矢量网络分析仪对其晶体结构、表面形貌、成分、电磁吸收性能进行分析.结果表明:钡铁氧体表面包覆完整的Ni-P合金镀层,化学镀工艺显著改善材料的电磁性能,并提高材料对电磁波的吸收能力,镀后复合粒子在2～18GHz频段内,最大反射率为-24.3dB,大于-10dB的吸收频带宽约2.8GHz.

Abstract:

In order to improve the microwave absorption properties,the compound particles of Ni-P coated barium ferrite were prepared by electroless plating.The structure,morphology,composition and microwave absorption properties of the Ni-P coated powders were investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM),energy dispersive analysis of X-rays (EDS),and vector network analyzer.The results show that barium ferrite is successfully coated with Ni-P alloy and exhibits excellent microwave absorption properties.The maximum microwave absorption of the compound particles reaches-24.3 dB within 2-18 GHz.The bandwidth with the loss above-10 dB exceeds 2.8 GHz.