High-performance iron-based superconducting strip and preparation process thereof
A technology of iron-based superconductivity and preparation process, which can be used in the manufacture of superconducting devices, superconducting/high-conducting conductors, cables/conductors, etc. Fully controllable size and deformation, improved current-carrying properties, high texture and density
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Embodiment 1
[0030] Single core Ba 0.6 K 0.4 Fe 2 As 2 The preparation of superconducting wire tape, the steps are as follows:
[0031] (1) Under the atmosphere of argon gas, metal barium shavings (mass purity is 99.50%), potassium block (mass purity is 99.95%), iron powder (mass purity is 99.99%) and arsenic particles (mass purity is 99.95%) ), after accurately weighing according to the molar ratio Ba:K:Fe:As=0.6:0.4:2:2, put it into a ball mill jar and ball mill it for 10 hours to make the powder mix evenly. Put the ball-milled powder into the Nb tube, seal both ends with copper plugs, and then heat-treat at 900°C for 50 hours to obtain the precursor powder for preparing superconducting wire strips.
[0032] (2) Fill the prepared precursor powder into a silver tube with a length of 10 cm. The inner diameter of the silver tube is 5 cm and the outer diameter is 8 cm. Seal the two ends with Nb plugs to obtain a tube complex, and squeeze the tube complex A single-core wire with a diamet...
Embodiment 2
[0044] 7 core Ba 0.6 K 0.4 Fe 2 As 2 The preparation of superconducting wire tape, the steps are as follows:
[0045] (1) Under the atmosphere of argon gas, metal barium shavings (mass purity is 99.50%), potassium block (mass purity is 99.95%), iron powder (mass purity is 99.99%) and arsenic particles (mass purity is 99.95%) ), according to the molar ratio Ba:K:Fe:As=0.6:0.4:2:2 after accurate weighing, put into the ball mill jar and ball mill for 10h, put the ball milled powder into the Nb tube, and seal it with a copper plug Heat treatment is carried out after both ends, the temperature of the heat treatment is 950° C., and the temperature is kept for 35 hours, and finally the precursor powder for preparing the superconducting wire tape is obtained.
[0046] (2) Fill the prepared precursor powder into a silver tube with a length of 30 cm. The inner diameter of the silver tube is 4 cm and the outer diameter is 5 cm. Seal the two ends with Nb plugs to obtain a tube complex...
Embodiment 3
[0061] 37 core Ba 0.6 K 0.4 Fe 2 As 2 The preparation of superconducting wire tape, the steps are as follows:
[0062] (1) Under the atmosphere of argon gas, metal barium shavings (mass purity is 99.50%), potassium block (mass purity is 99.95%), iron powder (mass purity is 99.99%) and arsenic particles (mass purity is 99.95%) ), according to the molar ratio Ba:K:Fe:As=0.6:0.5:2:2 after accurate weighing, put into the ball mill jar and ball mill for 10h, put the ball milled powder into the Nb tube, and seal it with a copper plug Heat treatment is carried out after both ends, the temperature of the heat treatment is 900° C., and the temperature is kept for 35 hours, and finally the precursor powder for preparing the superconducting wire tape is obtained.
[0063] (2) Fill the prepared precursor powder into a silver tube with a length of 80 cm. The inner diameter of the silver tube is 6 cm, and the outer diameter is 8 cm. Seal the two ends with Nb plugs to obtain a tube compl...
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