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Journal Archive

Platinum Metals Rev., 1985, 29, (3), 106

Platinum in the Glass Industry


Equipment made from platinum has been in use for glass making for over 150 years, and in spite of the relatively high cost of the metal the remarkable properties of platinum and some of its alloys are still encouraging their greater use for the production of household and industrial glasses. A recent article outlines the areas where platinum is being used cost effectively (D. Böttger, Glass, 1985, 62, (5), 177–178). The production of lightweight or thin walled bottles is regarded as important to the competitiveness of glass as a container material for the packaging industry. For this application optimum thermal homogenisation of the melt is a necessity and this can be achieved by the use of platinum components at key locations in the equipment.

For the manufacture of liquid crystal display glass there is no substitute for platinum feeders. Using platinum discharge nozzles heated directly by electricity it is possible to produce glass plates of equivalent quality to optical glass, at a thickness of less than 0.5mm. Considered to have advantages over both cathode ray tubes and conventional plasma displays, the flat display screen is also made of very thin (0.3 to 0.5mm) plates of a special glass that can only be manufactured by the use of a directly heated platinum feeder.