Engelhard Minerals & Chemicals Corporation

Engelhard Corporation

Herbert Myers

Robert C Langley

Robert J Farrauto

Muriel Abrash

Joseph C Williams

Platinum and iridium in catalytic electrodes for electrochemical uses is partially replaced with lead ruthenate-tantalum oxide composite. Electrodes are fabricated by first coating a film-forming metal substrate with a platinum-iridium composite undercoat, then overcoating with a composite containing lead, ruthenium, tantalum, platinum, iridium and oxygen. The most preferred anodes have a titanium substrate initially coated with approximately at least 2 gm/m.sup.2 of 70:30 .sup.w /o Pt:Ir composite, followed by about 20 gm/m.sup.2 of a composite having the nominal composition of 22.2.sup.w /o Pb.sub.2 Ru.sub.2 O.sub.6 ; 66.6 .sup.w /o Ta.sub.2 O.sub.5 ; 7.9 .sup.w /o Pt and 3.4 .sup.w /o Ir. The outer layer of the prepared anode contains from about 10 to about 16 .sup.w /o lead, from about 40 to about 65 .sup.w /o tantalum, from about 5 to about 7.5 .sup.w /o ruthenium, from about 6.0 to about 10 .sup.w /o platinum, from about 2.5 to about 5 .sup.w /o iridium, and from about 10 to about 20 .sup.w /o oxygen. These electrodes may be used in acidic, neutral or alkaline solutions. Typical uses include production of chlorine and chlorine compounds and electrowinning of metals, such as zinc.

Promotion of Pt-Ir catalytic electrodes with lead, tantalum, ruthenium

A solar energy collector having improved absorptance and emissivity levels comprising: (1) a silver-copper oxide-rhodium oxide solar absorption film, (2) a cerium oxide interlayer and a substrate of quartz, silica glass or metal. The cerium oxide interlayer minimizes agglomeration of the metal particles, maintains a relatively low thermal emittance and improves overall stability.

Thin film solar energy collector

Monolithic honeycomb structures are made by heating to a fluid condition an admixture comprising an inorganic powder and a temporary vehicle, forcing the fluid admixture through a stencil having a plurality of masking islands thereby forming a thin lamina beneath the stencil which is cooled immediately to form an essentially solid structure. This process is repeated to form a composite of successive cohered laminae thereby forming a monolithic honeycomb structure, which is heated to remove the vehicle and subsequently sintered to form a self-supporting honeycomb structure.

Growing community of inventors

South Orange, NJ, United States of America

Herbert Myers