Conditions for obtaining high-quality superconducting joint in Gd-Ba-Cu-O bulk superconductors were investigated, and the effects of PFM properties of the joined bulk and the change of yoke geometry in magnetization were examined. For a good superconducting joint fabricated by the local melting method using sintered Er-Ba-Cu-O, the J
c-B property and multiple Hall sensors indicates that the joined part is the preferential field penetration path. PFM was performed using a changed geometry of yoke in which concentrated long pulse to the joined part, but the result was equivalent to the trapped field before the changing yoke because the volume of the yoke was reduced. This is the first attempt to approach an effective PFM method for the joined bulk from the viewpoint of a changed geometry of yoke.
Ni is one of the important metal resources. Because Ni-containing waste liquid is drained after several plating turns in the factories, an effective recycling technique should be developed. A unique magnetic separation technique using high temperature superconducting bulk magnet has succeeded in collecting Ni-sulphate crystals, which were fabricated from the Ni-plating waste liquid. Pulsed-field magnetizing method was employed to activate the bulk magnet up to 2.80 T, which produced a field space of 1.40-T on the surface of the waste channel. Green coarse crystals were attracted from the flowing stream of Ni-saturated liquid containing weakly-magnetic particles of Ni-compounds. The magnetically-collected particles were identified as paramagnetic NiSO4/6H2O crystals, and slight differences in Ni concentration and grain size were observed between the particles attracted and not-attracted to the 1.8-T magnetic pole. In both cases, the large grains were found to consist of a single phase. The compound can be used as a raw material in the Ni-recycle process. This preferential extraction suggests a novel recycling method of Ni resource.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.