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Silver Cold and the Platinum Family Pt
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alloy alumina anode applications ASTM atmosphere Atomic barium brazing carbon cathode cent ceramic chemical coating Company components composition cone constant cooling copper Corning Glass Courtesy American crystal curves diameter dielectric diffusion ductility effect electrical electrical resistivity electron tubes elevated temperatures emission envelope expansion coefficient factor Figure filament filler metal film furnace gases getter glass-to-metal seals graphite grid heat high temperatures hydrogen increase insulation iron joint Kovar Laboratory layer material mechanical melting point mica mils modulus molybdenum nickel OFHC operation outgassing oxide oxygen phlogopite Phys physical plate platinum powder produced properties reduced refractory resistivity rhenium rods room temperature silica silver sintered steel strain stress structure sulfur surface Table tantalum Tech techniques tensile strength thermal expansion thickness thoria thorium tion titanium Torr treatment tungsten vacuum tube vapor pressure viscosity voltage wire York zirconium