Melting temperature of YBa2Cu3O7-x and GdBa2Cu3O7-x at subatmospheric partial pressure
The melting temperature, Tm, of YBa2Cu3O7 x and GdBa2Cu3O7 x superconductor ceramic compounds has been measured by differential thermal analysis (DTA) over a large oxygen partial pressure range of five orders of magnitude (2$10 5 < PO2 < 1 bar). It is shown that the DTA peak and endset tempera...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/141215 |
| Acceso en línea: | http://hdl.handle.net/10261/141215 |
| Access Level: | acceso abierto |
| Palabra clave: | High-Tc superconductors Phase transitions Cuprates Thermal analysis |
| Sumario: | The melting temperature, Tm, of YBa2Cu3O7 x and GdBa2Cu3O7 x superconductor ceramic compounds has been measured by differential thermal analysis (DTA) over a large oxygen partial pressure range of five orders of magnitude (2$10 5 < PO2 < 1 bar). It is shown that the DTA peak and endset temperatures are closer to Tm than the onset temperature. Correct measurement of Tm requires low heating rates and subatmospheric pressure conditions to avoid temperature shifts due to local oxygen overpressure and kinetic effects. |
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