Patent ID: 7213325

Claim:
A method of manufacturing a solenoid, comprising the steps of: a. Selecting a carbon steel tube; b. Crimping a first end of the tube; c. Selecting Mg powder and B powder; d. Mixing Mg powder and B powder stoichiometrically to form a mixture powder; e. Milling the Mg and B mixture powder to form a milled powder; f. Filling and packing the tube with the milled powder; g. Crimping a second end of the tube to create a powder-filled tube: h. Rolling the powder-filled tube to create a Fe-sheathed MgB 2 wire; i. Winding the MgB 2 wire along a helix to form a solenoid; j. Annealing, in argon gas, the solenoid between 600° C. and 900° C. for 0.5 hour to 3 hours; and k. Soldering current and voltage contacts to the solenoid.