TUNGSTEN ALLOY, AND TUNGSTEN ALLOY PART, DISCHARGE LAMP, TRANSMITTING TUBE AND MAGNETRON USING TUNGSTEN ALLOY

摘要

Provided is a method for producing a tungsten alloy that does not contain any thorium which is a radioactive material, that is equal to or higher in emission characteristics than a thorium-containing tungsten alloy, and that can be used for a discharge lamp, a transmitting tube or a magnetron. The method comprises the steps of mixing a HfC powder comprising primary particles having an average particle diameter of 15 µm or less and a tungsten powder having an average particle diameter of 0.5 to 10 µm to obtain a powder, preparing the raw powder to obtain a molded body, and sintering the molded body to obtain a sintered body.