β Scribed by W. Lee
No coin nor oath required. For personal study only.
The structure of sintered nickel composite plaque is characterized by an irregular pore structure with a wide distribution of pore sizes as well as a large median pore dimension compared with sintered-powder nickel plaques. The loading efficiency of the composite plaque was examined as a function of impregnating conditions including current density, temperature, continuity of current flow, the concentration of the impregnating bath and plaque thickness. The study reveals both advantages and disadvantages of the pore structure of the composite plaque with regard to efficient loading of active material. Advantages include reduced impregnation time and complete loading of the active material into thick (over 1.5 mm) as well as thin (less than 1.5 mm) plaques. However, because of;fast outward transport of OH-ions in the composite body which has a large pore size, there is an increased risk of the active material deposition on the plaque surface.
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