Electromagnetic properties of core–shell particles by way of electroless Ni–Fe–P alloy plating on flake-shaped diatomite

https://doi.org/10.1016/j.jmmm.2013.07.015Get rights and content
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Highlights

  • We used the flake-shaped diatomite particles as forming template to fabricate the core–shell ferromagnetic particles.

  • The diatomite particles were deposited Ni–Fe–P alloy by way of electroless plating methods.

  • The coated diatomite particles were lightweight ferromagnetic fillers.

  • The composites containing coated diatomite particles with heat treatment exhibited great potential in the field of electromagnetic absorbing.

Abstract

Flake-shaped diatomite particles coated by Ni–Fe–P alloy were prepared by electroless plating technique and processed by heat treatment. The samples were characterized by SEM, EDS and XRD. The results indicated that the magnetic diatomite particles had continuous and homogeneous Ni–Fe–P coating, and the phase constitution of the Ni–Fe–P coating was transformed from an amorphous structure to a crystalline structure during heat treatment. The measured electromagnetic parameters and the calculated reflection loss suggested that heat treatment was able to enhance the microwave absorption performance of the paraffin wax based composites. In a word, the Ni–Fe–P coated diatomite particle obtained in this paper is a promising candidate for lightweight microwave absorbing inclusions.

Keywords

Flake-shaped diatomite
Ni–Fe–P alloy
Electroless plating
Heat treatment
Electromagnetic property

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