摘要:以CoSO,●7H₂O、NaHPO₂ H₂O等为原料，在[Co*]=0.30mol/L, [Co*]:[ NaHPO₂.H₂O]=1:8(摩尔比),pH=9.8,T=90 C, [Co]:[NagCit]=2:l(摩尔比),DBS用量为0.5%(质量分数)的条件下,采用化学镀工艺制备了金属钴超细粉体。采用XRD、SEM对其相成分、显微

结构进行了研究。采用波导法,对超细钴粉的复介电常数、复磁导率在8.2~12.4GHz下的变化规律进行了研究。结果表明,金属钴超细粉体的粒径在0.5~1.0μm左右,呈片状和圆球状。所制备金属钴粉的介电损耗值较小,在0左右波动,其磁损耗在1.3左右变化，

关键词:钴;超细粉;化学镀;微波性能

Abstract:Metallic Co ultrafine powders were prepared by electroless plating method using CoSO:. 7H₂O, NaH:PO: .H2O, etc as starting mate-rials, the experimental conditions were as follows, [Co₂ ]=0.30 mol/L.[Co21:[ NaH₂PO₂ H2O] =1:8(mol ratio),pH=9.8 ,T=90 C. [Co*]:[Na,Cit]=2:l (mol ratio) . DBS 0.5% (mass fraction). X-ray diffractometry and scanning electron microscopy were used to obtain detailed information on the crystallography of the ultrafne cobalt powders. The complex dielec-tric constant and complex permeability dispersion were investigated us-ing network analyzer in 8.2~12.4 GHz by the waveguide method. It indicated that the average particles size of the ultrafine cobalt powders was about 0.5~1.0 μm, its crystals were observed to be square and global inmorphology. The dielectric loss of Co ultrafine powders showed a small value about zero in all measuring frequencies，which magnetic loss was about l.3.

Keywords: cobalt ; ultrafine powder ; electroless plating; microwave property