Preparation of Tungsten Micro Lanthanum-doped

The present invention relates to a micro-lanthanum-doped tungsten preparation method comprises the following steps: (1) pre-reduction to ammonium paratungstate blue tungsten; (2) the incorporation of silicon, potassium, aluminum nitrate solution, prepared doped tungsten blue; (3) the amino acid solution is sprayed onto the lanthanum doped tungsten blue stirring and drying, to obtain amino acid lanthanum doped tungsten blue; (4) a reduction reaction in the reduction furnace; (5) acid, to obtain a tungsten alloy powder of lanthanum ; (6) pressed into uniform density tungsten billet; (7) is pre-sintered to obtain a pre-sintered strip; (8) a sintered sintered to obtain a sintered article incipient fusion; (9) swaging, to obtain a tungsten rod; (10) annealing; (11) swaged to obtain tungsten rod; (12) Crude stretch; (13) the oxidation annealing; (14) via a plurality of motifs drawn into the required fine tungsten wire.

The invention has the advantages of simple process, easy to implement and cost advantages of production while using this method produced by micro-lanthanum-doped tungsten has a long life, good optical performance, strong seismic performance and a light bulb filament in the use of a small amount of sag features.




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