EM - Silver-loaded Epoxy Procedure

Created by Karen Darley, Modified on Fri, 3 May at 3:07 PM by Kathleen Patrick

Using Silver Powder to make silver loaded epoxy and more

Very fine, high purity silver powder may be used to produce electrically highly conducting paints and especially epoxy resins. Usually, the mixture is one half by volume of powder and a quarter each of epoxy components A + B. These materials mix very easily, but conductivity does not gradually change; rather if a little less silver is used, suddenly conductivity may be completely lost.
Unlike prepared silver epoxies, the powder has an unlimited shelf life and the mixture ratio can be varied to suit. Also, fast-curing or super-strong epoxy may be used as required and silver powder is rather more economical than prepared epoxies.

Note that because of the small particle size the powder and any solutions made are a little yellowish and darker than silver. This relates to particle size and refractive index and not purity.

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