Patent ID: 6191074
Filing Date: 2001-02-20
Classification: H01L,Y10S,Y10T

Abstract:
An extrusion process for extruding superconducting wires and rods, comprising the steps of:(a) providing a piston extruder comprising a die barrel, an extrusion nozzle, and a ram;(b) closing said extrusion nozzle;(c) loading extrudable paste in the form of granules into said die barrel, said extrudable paste comprising superconducting powder, a binder, a plasticizer, a lubricant, triolein as a dispersant, and a solvent;(d) subjecting said die barrel to a vacuum of about 200 millitorr;(e) compacting said extrudable paste by using said ram to apply a compaction stress of about 100 MPa;(f) opening said extrusion nozzle; and(g) extruding a wire rod through said extrusion nozzle using said ram, said ran moving at a rate of about 0.02 to 0.1 inch/minute.