Resin Impregnation Technique for Bulk Superconductors

摘要

In this review we summarize the present status of resin impregnation techniques for bulk high-temperature superconductors. Epoxy resin can permeate into the interior of bulk RE(rare earth element)-Ba-Cu-O superconductors when they are immersed in molten resin. Mechanical properties of resin-impregnated bulk RE-Ba-Cu-O are dramatically enhanced in addition to the enhancement of corrosion resistance. The thermal expansion coefficient can be controlled by adding quartz fillers to epoxy. Wrapping the bulk superconductors with carbon fabric prior to resin impregnation is effective in further enhancing the mechanical properties. Resin-impregnated bulk RRE-Ba-Cu-O materials have already been employed for several practical applications.