Preparation and properties of 1000 A Bi-2223 high-temperature current leads

Y. R. Cai; T. C. Wang; B. Q. Fu; Y. Feng; P. X. Zhang; L. Zhou

doi:10.1016/S0921-4534(00)00136-2

Preparation and properties of 1000 A Bi-2223 high-temperature current leads

Y. R. Cai, T. C. Wang, B. Q. Fu, Y. Feng, P. X. Zhang, L. Zhou

Northwest Institute for Nonferrous Metal Research

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

Abstract

The multiple cold isostatic pressing (MCIP) process was developed to manufacture bulk Bi-2223 materials with different shapes and dimensions, such as tubes, rods and cylinders. In this process, the Bi-2223 powder was formed into rods or tubes by the oil cold isostatic pressing method, and the formed materials were sintered, then the bulk materials were cold pressed and sintered again to obtain density and fabric structure. By using MCIP, we could obtain high-quality Bi-2223 bulks with good shape, high density, and smooth surface. In addition, joints between superconductor and current wires were fabricated by Ag-Mg alloy foils and Sn-Pb alloy during the preparation of Bi-2223 bulks. Then, Bi-2223 bulks could be linked directly with current wires to form current leads. As a result, joint resistance was measured as 10^-6 Ω at 77 K. The transport critical current of the current lead measured by a four-probe method was found to be 1000 A at 77 K in self-field. The I_c decreased to 500 A when magnetic field increased to 0.1 T. The microstructure of the sample was characterized through the X-ray diffraction pattern and scanning electron microscopy.

Original language	English
Pages (from-to)	339-341
Number of pages	3
Journal	Physica C: Superconductivity and its Applications
Volume	337
Issue number	1
DOIs	https://doi.org/10.1016/S0921-4534(00)00136-2
State	Published - 1 Jul 2000
Externally published	Yes
Event	IUMRS-ICAM'99: Symposium B of the 5th International Conference on Advanced Materials 'High-Tc Superconductors' - Beijing, China Duration: 13 Jun 1999 → 18 Jun 1999

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10.1016/S0921-4534(00)00136-2

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title = "Preparation and properties of 1000 A Bi-2223 high-temperature current leads",

abstract = "The multiple cold isostatic pressing (MCIP) process was developed to manufacture bulk Bi-2223 materials with different shapes and dimensions, such as tubes, rods and cylinders. In this process, the Bi-2223 powder was formed into rods or tubes by the oil cold isostatic pressing method, and the formed materials were sintered, then the bulk materials were cold pressed and sintered again to obtain density and fabric structure. By using MCIP, we could obtain high-quality Bi-2223 bulks with good shape, high density, and smooth surface. In addition, joints between superconductor and current wires were fabricated by Ag-Mg alloy foils and Sn-Pb alloy during the preparation of Bi-2223 bulks. Then, Bi-2223 bulks could be linked directly with current wires to form current leads. As a result, joint resistance was measured as 10-6 Ω at 77 K. The transport critical current of the current lead measured by a four-probe method was found to be 1000 A at 77 K in self-field. The Ic decreased to 500 A when magnetic field increased to 0.1 T. The microstructure of the sample was characterized through the X-ray diffraction pattern and scanning electron microscopy.",

author = "Cai, {Y. R.} and Wang, {T. C.} and Fu, {B. Q.} and Y. Feng and Zhang, {P. X.} and L. Zhou",

year = "2000",

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doi = "10.1016/S0921-4534(00)00136-2",

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T1 - Preparation and properties of 1000 A Bi-2223 high-temperature current leads

AU - Cai, Y. R.

AU - Wang, T. C.

AU - Fu, B. Q.

AU - Feng, Y.

AU - Zhang, P. X.

AU - Zhou, L.

PY - 2000/7/1

Y1 - 2000/7/1

N2 - The multiple cold isostatic pressing (MCIP) process was developed to manufacture bulk Bi-2223 materials with different shapes and dimensions, such as tubes, rods and cylinders. In this process, the Bi-2223 powder was formed into rods or tubes by the oil cold isostatic pressing method, and the formed materials were sintered, then the bulk materials were cold pressed and sintered again to obtain density and fabric structure. By using MCIP, we could obtain high-quality Bi-2223 bulks with good shape, high density, and smooth surface. In addition, joints between superconductor and current wires were fabricated by Ag-Mg alloy foils and Sn-Pb alloy during the preparation of Bi-2223 bulks. Then, Bi-2223 bulks could be linked directly with current wires to form current leads. As a result, joint resistance was measured as 10-6 Ω at 77 K. The transport critical current of the current lead measured by a four-probe method was found to be 1000 A at 77 K in self-field. The Ic decreased to 500 A when magnetic field increased to 0.1 T. The microstructure of the sample was characterized through the X-ray diffraction pattern and scanning electron microscopy.

AB - The multiple cold isostatic pressing (MCIP) process was developed to manufacture bulk Bi-2223 materials with different shapes and dimensions, such as tubes, rods and cylinders. In this process, the Bi-2223 powder was formed into rods or tubes by the oil cold isostatic pressing method, and the formed materials were sintered, then the bulk materials were cold pressed and sintered again to obtain density and fabric structure. By using MCIP, we could obtain high-quality Bi-2223 bulks with good shape, high density, and smooth surface. In addition, joints between superconductor and current wires were fabricated by Ag-Mg alloy foils and Sn-Pb alloy during the preparation of Bi-2223 bulks. Then, Bi-2223 bulks could be linked directly with current wires to form current leads. As a result, joint resistance was measured as 10-6 Ω at 77 K. The transport critical current of the current lead measured by a four-probe method was found to be 1000 A at 77 K in self-field. The Ic decreased to 500 A when magnetic field increased to 0.1 T. The microstructure of the sample was characterized through the X-ray diffraction pattern and scanning electron microscopy.

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ER -

Preparation and properties of 1000 A Bi-2223 high-temperature current leads

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