Electrical Contact Materials
Electrical contacts are the heart of every electrical device. Contacts, relays, circuit breakers, switches and other electromechanical devices need contact materials which fulfil certain requirements.
For many years, silver metal oxide compounds have been the workhorses in this industry. The silver-based compounds show a number of sought-after properties such as high thermal and electrical conductivities, good oxidation resistance, high melting points and good arc erosion resistance.
The first compounds were based on silver and cadmium oxide combinations. With the increasing environmental requirements and regulations like the RoHS or WEEE, tin oxide made its entry into this application. As a result, silver and tin oxide materials have gained a large market share.
At Keeling & Walker, we have developed a range of specifically formulated tin oxides, whose properties improve the technical performance of the contact materials further and show a very good environmental and toxicological profile.
CS grade Tin oxides are high density materials with an exceptionally low surface area. Their specific advantage is a tailored particle size distribution, which allows the use of various forming processes including wire extrusion. Continuous improvement of the powder quality is mandatory in this area with increasing technological requirements.
We continue to develop new generation tin oxide-based multi-metal materials to be prepared for future technologies.
Have a look at our Specialty Tin Oxides:
Electronic Devices with touchscreens are an indispensable part of modern life. Being able to operate a device with nothing else than a fingertip requires some sophisticated chemistries working in the background. Electrically conductive layers on the glass or polymer screen are a vital part of any touchscreen. Transparent Conductive Oxide layers of several nanometer thickness transport the electrical current which converts the touch of the fingertip into a signal. Physical Vapour Deposition methods like Sputtering are the method of choice to generate the layers. The sensitive layers require high purity raw materials to have a defect-free deposition.
Keeling & Walker offers with its range of High Purity Tin Oxides valuable and clean raw material for the manufacturing of the sputtering targets.