| 摘要 |
PURPOSE:To prepare the titled composite membrane suitable for a thin air electrode enabled in heavy load discharge over a long period of time and also excellent in preservability, by gelling a sol solution of a metal oxide after bringing the same into contact with a porous membrane having fine open pores distributed therein. CONSTITUTION:This inventive production method consists of a first process for bringing a sol solution of a metal oxide into contact with a porous membrane having fine open pores distributed therein and the succeeding second process for gelling said sol solution. The sol solution to be brought into contact with the porous membrane in the first process is a system in which at least either one of a metal oxide having oxygen adsorbing capacity and a metal oxide having a rutile type crystal structure is dispersed as a colloidal particle. In contact operation, a coating method or a permeation method is adapted. In the second process, the sol solution applied to the porous membrane, the surface thereof or the interior of each pore is gelled by removing and drying the dispersing medium of said solution at a room temp. in the atmosphere to constitute the composite membrane compounded with the porous membrane.
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