Processing Method of Tungsten Filament And Additive Thereof

The invention involves a tungsten filament production method and it special additives, the method includes the following steps: weighing certain tungsten oxide and putting into reactor, adding additives which weight percentage is 0.8 ~ 1.2% relative to tungsten oxide, adding aluminum nitrate; adding water and mixing uniform, drying; hydrogen gas deacidizing and preparing doping tungsten powder in multi-pipe furnace, the dew-point of hydrogen gas <=-40DEG C, the hydrogen gas flow is 1.5-1.7 m3/h, load-canoe amount is 400-500 g, push-canoe velocity is 1.5-2.5 canoe/h, the first deacidizing temperature is 600-650DEG C and the second deacidizing temperature is 800-900DEG C, the prepared doping tungsten powder is produced to tungsten strip through profiling and one time incipient fusion sintering, then is produced to thermos table tungsten wire through pressure processing; the invention has advantages of high production efficiency, high content of potassium in tungsten filament, good resistant temperature property and free-fluohydric acid pollution.




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