Preparation of YBa2Cu4O8 by a seeding method at ambient pressure

✍ Scribed by Yutaka Iwai; Mutsumi Noguchi; Hiroshi Saito; Masasuke Takata

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 288 KB
• Volume: 181
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(91)90109-c

✦ Synopsis

A seeding method was applied to the processing method of YBa2Cu408 superconducting oxide ( 124 phase). Seed of the 124 phase was prepared by the HIP process. Seed with 25 wt.% was mixed with the matrix oxide prepared by decomposition of nitric salt. They were pressed and fired at 850°C under oxygen gas flow ( 1 arm of oxygen partial pressure). After repeating the firing, the 124 single phase was obtained. The sample of this 124 phase exhibited superconductivity at onset temperature of 82 K and zero resistive point at 76 K. From the matrix oxide (unseeded), however, the 124 phase could not be formed under the same conditions.