| 摘要 |
The present invention relates to a method for obtaining an increased density of a material. More specifically, the invention relates to a method of increasing the critical current density of a superconducting material, especially of a Bi-based high temperature oxide superconducting material or precursor powder, the superconducting material being surrounded by a metal matrix thereby forming a length of conductor. According to the invention a method for obtaining an increased critical current density of a superconducting material is provided, the method comprising at least two intermediate rolling steps of subjecting the length of conductor to a rolling process in which a predetermined rolling load is set, each intermediate rolling step taking place between two heat treatment processes, wherein at least one intermediate rolling process takes place at a lower load than the previous intermediate rolling process. |
