Effects of Y_2O_3 ad CeO_2 on processing and Characteristics of tungsten electrodes

摘要

The effects of Y_2O_3 and CeO_2 in the rare earth tungsten electrodes of W-Y_2O_3, W-CeO_2 and W-Y_2O_3-CeO_2 on the processing and operating characteristics were discussed. The results suggested that the Growth of tungsten powders and sintered crystal granularity is greatly retarded by Y_2O_3, and hindrance of CeO_2 in comparatively slighter. It was also indicated that tungstates or oxytungstates are the most phases of Rare earth elements in the sintered rod, and its stability will affect the forming process. W-Y_2O_3-CeO_2 elec- Trode has superior properties of arc starting and consumption resistance.