Tokyo Shibaura Denki Kabushiki Kaisha

Tsutomu Takamura

Nobukazu Suzuki

Yuichi Sato

Hideo Honma

Osamu Sasaki

Kunihiro Ikari

Atsuo Imai

Kazuhiro Takeda

Toshiaki Nakamura

Toshiki Sasabe

There is disclosed an oxygen gas permselective membrane comprising a film of a water-containable or wettable metallic oxide. The oxygen gas permselective membrane according to this invention, though being very thin, does not allow water vapor and carbon dioxide gas in air to permeate therethrough and has a great function for allowing oxygen gas to selectively permeate therethrough.

Oxygen gas permselective membrane

An air electrode to be used for carrying out electrochemical reduction of an oxygen gas, which comprises an electrode body composed of a porous body and a fluorine-containing solvent incorporated therein. The air electrode is suitable for use in a hydrogen/oxygen fuel cell, a metal/air cell or an oxygen sensor.

Air electrode

There is presented a chemical copper-plating bath capable of providing a plated film having excellent mechanical characteristics, especially ductility, which bath contains a specific additive having the following formula: ##STR1## Stability of the bath as well as further improvement of mechanical strength of plated films are also found to be attained by adding in combination at least one compound selected from the group consisting of 1,10-phenanthroline, its derivatives, 2,2'-dipyridyl, 2,2'-diquinoline and water-soluble cyanides.

Chemical copper-plating bath

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Yokohama, Japan

Tsutomu Takamura