Intermetallic compound superconductors and alloy superconductors, and methods of making them

A method of conducting electrical current, comprising the steps of:

• mixing a Mg containing feedstock powder and a B containing feedstock powder together to form a mixture powder thereof so that the mixture powder contains Mg and B at a compositional ratio of Mg/B=(1−x)/(2+y) where 0<x<1, −2<y<0 and 0<y<2,
• shaping said mixture powder into the form of a pellet,
• heating said pellet in an inert gas to form an alloy superconductor,
• bringing said alloy superconductor to a temperature of 39 K or lower, and
• passing electrical current through said alloy superconductor.

A method of conducting electrical current, comprising the steps of:

• mixing a Mg containing feedstock powder and a B containing feedstock powder together to form a mixture powder thereof so that the mixture powder contains Mg and B at a compositional ratio of Mg/B=(1−x)/(2+y) where 0<x<1, −2<y<0 and 0<y<2,
• shaping said mixture powder into the form of a pellet,
• heating said pellet in a vacuum to form an alloy superconductor,
• bringing said alloy superconductor to a temperature of 39 K or lower, and
• passing electrical current through said alloy superconductor.

A method of conducting electrical current, comprising the steps of:

• mixing a Mg containing feedstock powder and a B containing feedstock powder together to form a mixture powder thereof so that the mixture powder contains Mg and B at a compositional ratio of Mg/B=(1−x)/(2+y) where 0<x<1, −2<y<0 and 0<y<2,
• shaping said mixture powder into the form of a pellet,
• heating said pellet in a pressurized inert gas to form an alloy superconductor,
• bringing said alloy superconductor to a temperature of 39 K or lower, and
• passing electrical current through said alloy superconductor.

A method of conducting electrical current, comprising the steps of:

• mixing a Mg containing feedstock powder and a B containing feedstock powder together to form a mixture powder thereof so that the mixture powder contains Mg and B at a compositional ratio of Mg/B=(1−x)/(2+y) where 0<x<1, −2<y<0 and 0<y<2,
• shaping said mixture powder into the form of pellet,
• pressing and heating said pellet to form an alloy superconductor,
• bringing said alloy superconductor to a temperature of 39 K or lower, and
• passing electrical current through said alloy superconductor.