| 摘要 |
PURPOSE:To produce a monolithic ceramic superconductor having uniform superconducting characteristics by calcining plural ceramic superconducting materials to be joined, temporarily joining the resulting calcined bodies with a binder contg. the same component as the superconducting materials and sintering them. CONSTITUTION:Powdery starting material for a ceramic superconductor such as YBa2Cu3O7 is molded into a pellet shape by die pressing or other method. The molded bodies are calcined, e.g. at 880 deg.C for 3hr in an atmosphere contg. oxygen to produce calcined bodies 2, 3. Polyvinyl butyral as a binder is added to YBa2Cu3O7 powder, terpineol as a solvent is further added and they are kneaded to prepare a pasty binder 4. The calcined bodies 2, 3 are superposed with the binder 4 in-between and joined together by sintering at 950 deg.C for 5hr in oxygen. A monolithically joined ceramic superconductor 1 having uniform superconducting characteristics is obtd. |
