Process for preparing multicomponent composite rare-earth-tungsten electrode material

The present invention belongs to the field of refractory RE functional material. The improved multicomponent composite RE-W electrode material contains three kinds of RE oxides in 2.0-2.2 wt%, including La2O3, Y2O3 and CeO2 in 0.4-1.4 wt% each, except W. The preparation process of the multicomponent...

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Bibliographic Details
Main Authors BINGSHAN LI, FUCHENG HU, ZUOREN NIE
Format Patent
LanguageEnglish
Published 02.03.2005
Edition7
Subjects
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
WELDING
WORKING BY LASER BEAM
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Summary:The present invention belongs to the field of refractory RE functional material. The improved multicomponent composite RE-W electrode material contains three kinds of RE oxides in 2.0-2.2 wt%, including La2O3, Y2O3 and CeO2 in 0.4-1.4 wt% each, except W. The preparation process of the multicomponent composite RE-W electrode material includes compounding mixed RE oxide solution with La2O3, Y2O3 and CeO2; preparing suspension of ammonium paratungstate in deionized water; mixing the solution and the suspension via stirring, evaporation and drying; the first hydrogen reduction at 550-700 deg.c, and the second hydrogen reduction at 850-1000 deg.c to prepare powder of average granularity of 1.2-1.4 micron. The preparation process has no ammonium paratungstate calcinating step, simplified process, low power consumption, raised finished product rate and stability.
Bibliography:Application Number: CN2004180295