熔盐电解稀土用钨电极的制备工艺研究  

Preparation of Tungsten Electrode Used in Rare Earth Fused Salt Electrolysis

作　　者：贾根贵 李昌林[2] 孙东亚 张太康[2] 吕莹[2] 

机构地区：[1]中国兵器工业第五二研究所,内蒙古包头014034 [2]中南大学冶金科学与工程学院,湖南长沙410083 [3]佳科太阳能硅有限公司,福建厦门361000

出　　处：《稀有金属与硬质合金》2010年第3期43-45,共3页Rare Metals and Cemented Carbides

摘　　要：采用适当的含镍化合物及相应的加入方式制备镍包钨粉,微量镍可在钨颗粒表面均匀包覆;镍包覆钨粉经活化烧结生产的致密钨棒用于稀土电解的阴极,较传统的钼阴极具有更强的抗腐蚀性。用质量分数为0.4%的微量镍包覆钨粉,可实现在低于1 500℃温度下烧结出相对密度大于90%的致密钨材。该钨电极制备工艺具有流程短、生产成本低、质量稳定等特点。Tungsten powders coated by nickel were prepared with proper nickel compound as the raw material and corresponding addition method.Trace nickel can be coated evenly on the surface of tungsten powders.The above tungsten powders were used to produce compact tungsten rods by activated sintering.The tungsten rods were applied in rare earth electrolysis as the cathode of better corrosion resistance than traditional molybdenum cathode.The compact tungsten electrode of a relative density over 90% can be prepared by activated sintering at a temperature below 1 500 ℃ and using the tungsten powders coated with 0.4% nickel.The above tungsten electrode preparation process has the advantages of short flow,low production cost,and stable product quality.

关 键 词：钨电极 镍包覆 活化烧结 

分 类 号：TG146.411[一般工业技术—材料科学与工程]