Method for preparing superconducting band of oxides

Abstract

The invention relates to a method to make oxide superconducting band. It uses CVD technology to make oxide superconducting band under the effect of strong magnetic field. The band is silver or silver-nickel alloy, silver / stainless steel compounding band. The invention has simple technology. The critical current density could reach to 104A / cm2 under 77K, 1T condition.

Description

technical field

[0001] The invention relates to a preparation method of a rare earth oxide high-temperature superconducting tape, in particular to a preparation method of an oxide superconducting tape with a high critical current density. Background technique

[0002] The commercialization of the first-generation bismuth-based ribbons simultaneously promoted the development of the second-generation rare earth oxide high-temperature superconducting ribbons (coated ribbons or REBCO for short). Coated tapes have higher current carrying capacity and better superconductivity under magnetic field than bismuth-based tapes; its cost is predicted to be 1 to 4 times lower than that of bismuth-based tapes, and it is expected to truly become a practical high-temperature superconducting engineering material with broad application prospects.

[0003] Coated strips have made significant progress in recent years. The focus of their research is on how to obtain a biaxially textured base ta...

Examples

Embodiment 1

[0030] The baseband uses polycrystalline silver metal, the organic sources are Y, Ba, Cu, and high-purity argon is used as the carrier gas. The baseband temperature is 850°C, the magnetic field strength is 8T, and the holding time is 1 hour. The result is a YBCO superconducting tape.

[0031] image 3 It is the X-ray rocking curve spectrum of the sample under different magnetic fields. Such as image 3 It is shown that with the increase of the magnetic field, the full width at half maximum of the rocking curve of the strip decreases significantly, that is to say, the texture orientation of the strip is greatly improved with the increase of the magnetic field. Correspondingly, the critical current density of the strip is also significantly increased. For example, when no magnetic field is applied, at 77K, 0T, the critical current density of the strip is only 1.5×10 4 A / cm 2 ; while the strip prepared under 4T magnetic field can reach 5.8×10 at 77K, 0T 4 A / cm 2 ; At 77K, i...

Embodiment 2

[0033] The baseband adopts nickel alloy / silver composite baseband, the organic source is Y, Ba, Cu, high-purity argon is used as the carrier gas, the baseband temperature is 750°C, the magnetic field strength is 4T, and the holding time is 1 hour. As a result, the YBCO superconducting tape was obtained, and its critical current density could reach 6×10 at 77K, 0T. 4 A / cm 2 . The critical current density of the strip without magnetic field is only 104A / cm at 77K, 0T 2 about.

technical field

[0001] The invention relates to a preparation method of a rare earth oxide high-temperature superconducting tape, in particular to a preparation method of an oxide superconducting tape with a high critical current density. Background technique

[0002] The commercialization of the first-generation bismuth-based ribbons simultaneously promoted the development of the second-generation rare earth oxide high-temperature superconducting ribbons (coated ribbons or REBCO for short). Coated tapes have higher current carrying capacity and better superconductivity under magnetic field than bismuth-based tapes; its cost is predicted to be 1 to 4 times lower than that of bismuth-based tapes, and it is expected to truly become a practical high-temperature superconducting engineering material with broad application prospects.

[0003] Coated strips have made significant progress in recent years. The focus of their research is on how to obtain a biaxially textured base ta...

Examples

Embodiment 1

[0030] The baseband uses polycrystalline silver metal, the organic sources are Y, Ba, Cu, and high-purity argon is used as the carrier gas. The baseband temperature is 850°C, the magnetic field strength is 8T, and the holding time is 1 hour. The result is a YBCO superconducting tape.

[0031] image 3 It is the X-ray rocking curve spectrum of the sample under different magnetic fields. Such as image 3 It is shown that with the increase of the magnetic field, the full width at half maximum of the rocking curve of the strip decreases significantly, that is to say, the texture orientation of the strip is greatly improved with the increase of the magnetic field. Correspondingly, the critical current density of the strip is also significantly increased. For example, when no magnetic field is applied, at 77K, 0T, the critical current density of the strip is only 1.5×10 4 A / cm 2 ; while the strip prepared under 4T magnetic field can reach 5.8×10 at 77K, 0T 4 A / cm 2 ; At 77K, i...

Embodiment 2

[0033] The baseband adopts nickel alloy / silver composite baseband, the organic source is Y, Ba, Cu, high-purity argon is used as the carrier gas, the baseband temperature is 750°C, the magnetic field strength is 4T, and the holding time is 1 hour. As a result, the YBCO superconducting tape was obtained, and its critical current density could reach 6×10 at 77K, 0T. 4 A / cm 2 . The critical current density of the strip without magnetic field is only 104A / cm at 77K, 0T 2 about.

Images