| 标题 |
 Melt Growth of YBa2Cu3O7-δ by Using BaCu2O2 and Y2BaCuO5 in Ag-Sheath BaCu2O2和Y2BaCuO5在银鞘中熔融生长YBa2Cu3O7-δ
相关领域
材料科学
高温超导
结晶学
超导电性
凝聚态物理
物理
化学
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Abstract: REBa2Cu3O7-δ (REBCO; RE = Y or rare earth) wires with high critical current density (Jc) are developed as coated conductors because REBCO crystals must be oriented to achieve high Jc. To create biaxially textured REBCO films, REBCO is deposited as a thin film on an oriented substrate. However, REBCO-coated conductors exhibit problems of hotspots, delamination etc. Because these problems can be eliminated in round wires, the development of round REBCO wires is necessary. Silver is a suitable sheath material for Powder-in-Tube (PIT)-processed REBCO wires because it does not react with REBCO, is not oxidized at high temperatures in the air, and is permeable to oxygen. In addition, the melting point of silver is 961 °C, which is lower than that of YBa2Cu3O7-δ (1000 °C). However, with other materials having low melting points, the melt growth method must be used. In this study, BaCu2O2 and |
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