Galvanically compatible conductive filler and methods of making same
AssigneePotters Industries, Inc.
InventorsRobert A. Schleifstein, Andrew M. Wasowicz
Life of this patent
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Abstract
Composite particles suitable as conductive filler for electrically conductive compositions which can be used as gaskets, caulking and plastics, for example. The compositions are useful as EMI shielding and electrostatic charge dissipation materials. Methods of making and using the foregoing are also covered.
Claims32
A composite particle which is galvanically compatible with a metallis material, said particle comprising in combination:
- an electrically conductive core material having a surface oxide layer;
- an electrically conductive refractory material;
- and
- interposed between said electrically conductive refractory material and core material a noble metal or noble metal alloy;
- said core material and said refractory material being conductively fused.
A composite particle, suitable for incorporation in an electrically conductive composition which is galvanically compatible in respect of a metallic material, said particle comprising in combination:
- a core material (a) being metallic and having a analysis substantially the same as that of said metallic material, or (b) being substantially electrochemically inert in respect of said metallic material, or (c) including a first portion having a metallic analysis substantially the same as that of said metallic material and a second portion which is substantially electrochemically inert in respect of said metallic material;
- an electrically conductive material, which electrically conductive material is substantially inert to participation in or catalysis of cathodic reaction involving the electrochemical reduction of molecular oxygen or water;
- and
- interposed between said electrically conductive material and said core material a noble metal or noble metal alloy;
- said electrically conductive material and said core being bonded through at least the noble metal or noble metal alloy.
Dependencies are inferred from the claim text.