| 摘要 |
PURPOSE:To decrease the price of a battery and eliminate special operation such as vacuum pouring of electrolyte in battery assembly by manufacturing porous magnesia particles having a specified pore size by using low price magnesia, and using a filling layer of the particles as a separator. CONSTITUTION:Magnesia particles are manufactured by sintering heavy magnesia having a mean particle size of 0.3mum with magnesium nitrate. Magnesium nitrate solution corresponding to 2wt% as magnesia is added to heavy magnesia, and granules having a particle size of about 200mum are prepared and calcined at 600 deg.C to decompose magnesium nitrate and sintered at 1,000 deg.C to obtain porous particles having appropriate strength. Porous particles having a particle size of 100-150mu are filled between electrodes 1 and 3, and a porous magnesia plate 4 having a pore size of 20mum is placed on the particle layer. The periphery of the plate 4 is fixed to electrodes with a flange 5. Thereby, the price of battery is decreased and special operation such as vacuum pouring of electrolyte in battery assembly can be eliminated. |
