Sapphire and quartz optical windows produced with ceramic-metal sealing techniques. ... It is therefore highly resistant to scratches and wear. Its melting point of 2.040C. permits use of a high-temperature brazing alloy to achieve a vacuum-tight seal (leak rate less ... Eimac EBW devices are being flown on all Polaris A-3 missiles, developed by Lockheed Missile and Space Company for the U. S. Navy.
|Title||:||The Ceramic Age|