| 摘要 |
1344091 Sintered fuel cell cathode TAVKOZLESI KUTATO INTEZET and HAJDUSAGI IPARMUVEK 12 March 1971 6721/71 Heading C7D An alloy powder e.g. Ni - Al or Fe - Al is coated with 2-50% weight Ag, mixed with an alkaline resistant metal powder e.g. Ni, pressed and sintered at 500-800‹C and then treated with hot KOH solution to form Raney Ag. The Al component of the alloy powder can be replaced by Zn, Cd or Si. In an example a 70/30 Ni - Al alloy powder is coated with 10-20% Ag and mixed with 50% weight Ag coated Ni powder. After hot pressing in H 2 at 500-800‹C, the Al which has diffused into the Ag is dissolved in hot KOH. |
