Abstract
Monocore Ag-sheathed (Bi,Pb) 2Sr 2Ca 2Cu 3O x tapes were prepared by the oxide-powder-in-tube method. The effects of tension during intermediate rolling between sinterings have been investigated. It has been revealed that the critical current density J c is higher when the front and back tensions are applied simultaneously than when only one of them is applied. The excessive tension deteriorates the J c. The optimum level of tension has been found to be ∼5 MPa. The application of tension suppresses the sausaging of silver/oxide core interface, improves the grain alignment of oxide core and results in higher J c.
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