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Details van artikel 197 van 243 gevonden artikelen
| Titel: |
Some Further Studies in Combustion Synthesis of the YBa2Cu307-x Superconductor |
| Auteur: |
Lebrat, Jean-Pascal Varma, Arvind |
| Verschenen in: |
Combustion science and technology |
| Paginering: | Jaargang 88 (1993) nr. 3-4 pagina's 177-185 |
| Jaar: |
1993-02-01 |
| Inhoud: |
The combustion synthesis of the YBa2Cu3Oz-x ceramic superconductor was achieved from CuBaO2 and Y2O3 mixtures, using both self-propagating high-temperature synthesis (SHS) and thermal explosion modes. Particular attention was paid to establishing the mechanism of formation of the YBa2Cu3O3-2 product. Previous studies included effects of BaO2 and Cu particle sizes, along with quenching of reacting pellets. It was shown that the mixture of reactants undergoes a complex sequence of reactions before eventually forming the final product. In the present work, the effect of the Y2O3 particle size has been investigated. The initiation of YBa2Cu3O7-x formation has also been studied by providing a portion of the copper as either Cu2O or CuO. It is shown that the oxidation of Cu to form Cu2O is a necessary step for the reaction to become self-sustaining, but that excessive oxidation to Cu2O inhibits the reaction, leading to partially reacted pellets. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 197 van 243 gevonden artikelen
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