Apparatus for use in electrical, e.g. electrochemical, measurement procedures, and its production and use, and composite assemblies incorporating the apparatus
First Claim
1. A composite electrode comprising:
- a solid non-conducting substrate;
metallic particles;
a non-conductive matrix layer in which the metallic particles are incorporated, andinsoluble metal salt particles which are of the same metal as the metallic particles, which are incorporated in said non-conductive matrix and which are accessible to reactions with electrochemical reagents at the surface of the electrode, such that there are insoluble metal salt particles located between the metallic particles and the surface of the electrode and the surface of the electrode predominantly comprises metal salt particles whereby the ratio of metallic particles to insoluble metal salt particles gradually increases from the outermost towards the innermost portions of the non-conductive matrix layer.
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Accused Products
Abstract
A composite electrode, comprising:
a solid non-metallic substrate, (such as ceramic, glass, or epoxy resin,)
and, bonded directly or indirectly to said substrate,
a non-conducting matrix, incorporating particles which are accessible to the electrode surface and contain an insoluble metal salt (e.g. halide) in direct electrical contact with the metal corresponding to said salt, said metal being present either (i) in the form of metallic particles incorporated in a non-conducting matrix zone disposed so that said metal salt-containing particles are located between said metallic particles and said electrode surface, and/or (ii) a solid metallic surface in the form of an intermediate layer between said matrix and said substrate.
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Citations
13 Claims
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1. A composite electrode comprising:
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a solid non-conducting substrate; metallic particles; a non-conductive matrix layer in which the metallic particles are incorporated, and insoluble metal salt particles which are of the same metal as the metallic particles, which are incorporated in said non-conductive matrix and which are accessible to reactions with electrochemical reagents at the surface of the electrode, such that there are insoluble metal salt particles located between the metallic particles and the surface of the electrode and the surface of the electrode predominantly comprises metal salt particles whereby the ratio of metallic particles to insoluble metal salt particles gradually increases from the outermost towards the innermost portions of the non-conductive matrix layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A composite electrode comprising:
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a solid non-conducting substrate; metallic particles; and a non-conductive matrix incorporating insoluble salt particles, the salt being of the same metal as the metallic particles and the metal salt particles being accessible to reaction with external electrochemical reagents at the surface of the electrode, wherein the metallic particles are incorporated in said non-conductive matrix, said matrix having been applied directly to said substrate as a metallic particle containing layer and the metal salt particles thereafter being formed therein by treatment of the surface of said matrix layer, such that there are insoluble metal salt particles located between the metallic particles and the surface of the electrode and the surface of the electrode predominantly comprises metal salt particles whereby the ratio of metallic particles to insoluble salt particles gradually increases from the outermost towards the innermost portions of the non-conductive matrix layer.
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Specification