Preparation and Characterization of Electroless Co-Ni Coated ZrO2 Powder for Microwave Absorbing

Jing Hua Jiang; Fu Min Lu; Aibin Ma; Jin Zong Zuo; Yi Gao

doi:10.4028/www.scientific.net/AMR.97-101.1290

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 97-101Preparation and Characterization of Electroless...

Preparation and Characterization of Electroless Co-Ni Coated ZrO₂ Powder for Microwave Absorbing

Abstract:

Co-Ni coated ZrO2 composite powder was prepared by an optimized ultrasonic electroless plating process to obtain good microwave absorption properties in GHz region. Aggradation mechanism of electroless Co-Ni alloy was analyzed and the principal influencing factors on the depositing rate were investigated by weighting-in-powder. The metallized powder was characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and vector network analyzer. Results showed that ultrafine ZrO2 powder pretreated with sensitization and activation were homogeneously deposited with Co-Ni coating at 358K and pH value of 9, immerged in the optimal plating bath using NaH2PO2 as reductant. The Co-Ni coating deposited in the alkaline plating bath had the depositing rate of above 6µm/h and the average weight ratio of 5.5 for Co/Ni. The new metallized powder was endowed high microwave absorbing properties; the maximum reflection loss reaches to -23dB at the frequency of 9.40 GHz.

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Periodical:

Advanced Materials Research (Volumes 97-101)

Pages:

1290-1294

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.97-101.1290

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Online since:

March 2010

Authors:

Jing Hua Jiang, Fu Min Lu, Aibin Ma, Jin Zong Zuo, Yi Gao

Keywords:

Composite Powder, Co-Ni Coating, Electroless Plating (EP), Microwave Absorption, Zirconia

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