| 摘要 |
PURPOSE:To enhance the preservation performance and the electric discharge characteristic of a button-type air cell by regulating the wettability of a positive catalyst by restricting the density of catalyst packed into a core member to within a specified range. CONSTITUTION:A positive catalyst 5 principally consists of active carbon, graphite and managnese oxide. In preparing it, after 1 part by weight of carbon (active carbon plus graphite) and 1.5 parts by weight of managanese oxide are preliminary mixed, wet mixing is performed by using 2.4 times the total quantity of these principal components of water. Next, 1 part by weight of the thus prepared wet mixture is mixed with 0.2-0.4 part by weight of the solid component (tetrafluoroethylene) of an aqueous fluorine-resin dispersion. Then the thus obtained mixture is applied to and packed into a core member by means of a roller. Next, thus obtained catalyst is dried under condition of 60-80 deg.C, and the thickness is restricted so that the packing density of the catalyst becomes 0.95- 1.21g/cm<3> by performing roller press again. After that, the thus pressed positive catalyst 5 is punched into a diameter which can be placed in a case 1, and thermally treated below the melting point of tetrafluoroethylene. |
