Journal
MATERIALS LETTERS
Volume 59, Issue 4, Pages 524-528Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2004.10.041
Keywords
Ni-Co-P coating; fly-ash cenosphere particles; [Ag(NH3)(2)](+) activator; electroless plating
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Electroless Ni-Co-P coating of fly-ash cenosphere particles is demonstrated in the present investigation. The electroless Ni-Co-P coating process is modified by replacing the conventional sensitization and activation steps by only using activation step with [Ag(NH3)(2)](+) activator. The cenosphere particles are characterized by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDX), X-ray diffraction analysis (XRD) and X-ray photoelectron spectroscopy (XPS) during and after the coating process. Relatively uniform coating is obtained under the given coating conditions. The possible mechanism of electroless Ni-Co-P coating of cenosphere particles utilizing [Ag(NH3)(2)](+) activator is suggested. The low density Ni-Co-P-coated cenosphere particles may be utilized for manufacturing conducting polymers for EMI-shielding application and microwave absorbing materials. (C) 2004 Elsevier B.V. All rights reserved.
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