| 摘要 |
PURPOSE:To aquire sufficient amount of active material with less number of times of impregnations by generating convection which gives a water pressure of 1kg/cm<3> to a substrate submerged into the cadmium nitrate solution. CONSTITUTION:A substrate with porosity of 75-80%, which is obtained by using the porous nickel plated steel as the core material and adhering and sintering carbonil-nickel to said material, is submerged into the cadmium nitrate solution of about 5mol/l at a temperature of 70 deg.C. The cadmium nitrate solution has convection which gives water pressure of 1kg/cm<3> to the substrate. With such water pressure, the cadmium nitrate solution is forced to enter the pores of substrate. After the substrate is submerged into the cadmium nitrate solution, it is then held in the alkaline solution of about 30 deg.C and then washed by water and dried up. Moreover, it is then submerged into the aqueous solution of cadmium nitrate. The active material can be acquired by repeating such processes for 4-6 cycles. |
