Effect of heating rate on properties of YBa2Cu3O7-x
- 1 December 1988
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 1 (4) , 177-179
- https://doi.org/10.1088/0953-2048/1/4/005
Abstract
YBa2Cu3O7-x powders, made at Argonne National Laboratory by solid-state reaction or supplied by Rhone-Poulenc, were sintered in oxygen at 910 or 950 degrees C. Heating rates to the sintering temperature were varied from 0.5 to 5 degrees C min-1. Sintered specimens were characterised by differential thermal analysis, X-ray diffraction, optical and scanning electron microscopy, and measurement of electrical resistivity, superconducting transition temperature and critical current density. It was found that the heating rate affected only the properties of specimens which were heated to a temperature at which second phases present could react. Slower heating improved electrical properties as a consequence of inducing greater reaction to desired phases such as YBa2Cu3O7-x.Keywords
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