Fast synthesis of YBa2Cu3Oz superconductor at low temperatures of its orthorhombic modification existence using mechanically activated and densified two-powder precursors

摘要

The possibility of developing a fast (10-30 min) and low-temperature (500-600 degreesC) synthesis of YBa2Cu3Ochi superconductor with a T-c up to 90 K appearing immediately after preparation is discussed. Mechanically activated and densified two-powder precursors have reproducibly yielded 80-90% XRD-pure YBa2Cu3Oz phase when using internal oxygenation of soft-chemistry produced Cu2O by YBa2O3.5 (containing BaO2) in their mixture (Y:Ba:Cu = 1:2:3) mechanically activated in a planetary mill and warmly compacted at 250 degreesC into a dense pellet. Such advantages allowed us to obtain trial samples of aluminum-sheathed chemistry tapes with the YBa2Cu3Oz core. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 20]