| 摘要 |
PURPOSE:To suppress increase in IR loss caused when the current density of formation is increased, reduce the voltage of a container and obtain a formation counter electrode having a sufficient mechanical strength by packing the sintered body of nickel carbonyl powder in the holes of foamy nickel affixed to the surface of a nickel plate to be electrolysed. CONSTITUTION:After a part of foamy nickel 1 is pressed to increase its density, this is unified with a nickel plate 2 by spot welding. Next the unified body is washed with dilute nitric acid before being sufficiently washed with water in order to achieve higher close contact during sintering. Then slurry prepared by adding 4 parts CMC and 100 parts water to 100 parts nickel carbonyl powder is sufficiently rubbed into the unified body consisting of the foamy nickel 1 and the nickel plate 2. The thus obtained body is dried before being sintered in a reducing atmosphere at 1,000 deg.C for 15min thereby making a formation counter electrode consisting of the foamy nickel 1 and sintered nickel 3 packed in the foamy nickel 1. When current density is high, the thickness of the nickel plate 2 should be increased without any necessity of varying the thickness of the of the foamy nickel 1. |
