| 摘要 |
In manufacturing the contact materials which satisfy all the criteria required for use in vacuum switches as to chopping current, circuit breaking performance, withstand voltage, welding separation force and wear, Cu powder and Ta2O5 powder are mixed, and compressed while heating below the melting point of Cu in a nonoxidizing atmosphere. Or a green compact is first manufactured from Ta2O5 powder or a mixture of Ta2O5 and Cu powder, and molten Cu is made to infiltrate into the compact. Preparing a green compact from a mixture of Cu powder and Ta2O5 powder, it may be sintered at a temperature below the melting point of Cu, re-pressed, and resintered at 400 - 900<o>C in a nonoxidizing atmosphere. |
