Simple preparation method for iron-based superconducting wire/tape
An iron-based superconductor and wire-tape technology is applied to the simple preparation of iron-based superconducting wire strips and the field of copper-clad iron-based superconducting wire strips, which can solve the difficulty of preparing high-performance samples, forging and drawing and other problems, to achieve the effect of high critical transition temperature and high purity
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Embodiment 1
[0017] Example 1: copper casing SmO 0.8 f 0.2 Preparation of FeAs Superconducting Wire
[0018] Step 1: Preparation of initial powder
[0019] Sm powder and As powder were weighed according to the molar ratio of 1:1.03 and mixed under Ar protective atmosphere. The mixed Sm powder and As powder were packaged in a quartz tube for sintering, and the vacuum degree was 10 -6 Pa, the heat treatment process is as follows: from room temperature to 400°C, the heating rate is 5°C / min; from 400°C to 600°C, the heating rate is 1°C / min; at 600°C for 5 hours; from 600°C to 900°C, the heating rate is 1°C / min; heat preservation at 900°C for 10 hours; finally cool the furnace to room temperature.
[0020] Step 2: Copper casing SmO 0.8 f 0.2 Preparation of FeAs Superconducting Wire
[0021] In a glove box protected by high-purity argon gas, SmAs powder, Fe powder, Fe 2 o 3 Powder, FeF 3 The powder is mixed according to the ratio of 30:12:8:2.4; then it is fully ground; the ground raw...
Embodiment 2
[0022] Example 2: copper casing PrO 0.8 f 0.2 Preparation of FeAs Superconducting Wire
[0023] Step 1: Preparation of initial powder
[0024] The Pr powder and As powder were weighed according to a molar ratio of 1:1 and mixed under an Ar protective atmosphere. The mixed Pr powder and As powder were packaged in a high-vacuum quartz tube for sintering, and the vacuum degree of the quartz tube was 10 -4 Pa, the heat treatment process is as follows: room temperature-400°C, heating rate is 5°C / min; 400°C-600°C, heating rate is 5°C / min; 600°C for 10 hours; 600°C-900°C heating rate is 5°C / min; heat preservation at 900°C for 20 hours; finally cool the furnace to room temperature.
[0025] Step 2: Copper casing PrO 0.8 f 0.2 Preparation of FeAs Superconducting Wire
[0026] In a high-purity argon-protected glove box, PrAs powder, Fe powder, Fe 2 o 3 Powder, FeF 3 The powder is mixed according to the ratio of 30:12:8:2.4; then it is fully ground; the sample after grinding i...
Embodiment 3
[0027] Example 3: Copper casing CeO 0.8 f 0.2 Preparation of FeAs Superconducting Wire
[0028] Step 1: Preparation of initial powder
[0029]Ce powder and As powder were weighed according to the molar ratio of 1:1 and mixed under Ar protective atmosphere. The mixed Ce powder and As powder are packaged in a high-vacuum quartz tube for sintering, and the vacuum degree of the quartz tube is 10 -4 Pa, the heat treatment process is as follows: room temperature-400°C, heating rate is 5°C / min; 400°C-600°C, heating rate is 5°C / min; 600°C for 10 hours; 600°C-900°C heating rate is 5°C / min; heat preservation at 900°C for 20 hours; finally cool the furnace to room temperature.
[0030] Step 2: Copper sleeve CeO 0.8 f 0.2 Preparation of FeAs Superconducting Wire
[0031] In a glove box protected by high-purity argon gas, CeAs powder, Fe powder, Fe 2 o 3 Powder, FeF 3 The powder is mixed according to the ratio of 30:12:8:2.4; then it is fully ground; the sample after grinding is...
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