Effects of Different Post-Treatments on Superconducting Properties of Nd-123 Fabricated by PMP in Air

Ruiheng Wu; Lian Zhou; Yong Feng

Effects of Different Post-Treatments on Superconducting Properties of Nd-123 Fabricated by PMP in Air

Ruiheng Wu, Lian Zhou, Yong Feng

Research output: Contribution to journal › Article › peer-review

Abstract

The effects of different (Ar, O₂) post-treatments on the superconducting properties of Nd-123 fabricated by the Powder-Melting Process (PMP) in air are discussed. The results indicate that the post-treatments at high temperatures in Ar firstly enable PMP Nd-123 sample to absorb more oxygen in subsequent O₂ treatment, and hence improve its superconducting properties - sharpening ΔT and increasing J_t. There is a limitating temperature, T_line(∼600°C), for low temperature post-treatments in pure O₂. When the annealing temperature in O₂ is much higher or lower than T_line, the oxygen content of the sample can not increase efficiently. The effects of temperature and time of Ar, O₂ post-treatment on superconducting properties of Nd-123 are discussed on the basis of thermodynamic diffusion theory.

Original language	English
Pages (from-to)	45
Number of pages	1
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	29
Issue number	1
State	Published - Feb 2000
Externally published	Yes

Keywords

Nd-123 superconductor
PMP
Thermodynamic diffusion theory

Cite this

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title = "Effects of Different Post-Treatments on Superconducting Properties of Nd-123 Fabricated by PMP in Air",

abstract = "The effects of different (Ar, O2) post-treatments on the superconducting properties of Nd-123 fabricated by the Powder-Melting Process (PMP) in air are discussed. The results indicate that the post-treatments at high temperatures in Ar firstly enable PMP Nd-123 sample to absorb more oxygen in subsequent O2 treatment, and hence improve its superconducting properties - sharpening ΔT and increasing Jt. There is a limitating temperature, Tline(∼600°C), for low temperature post-treatments in pure O2. When the annealing temperature in O2 is much higher or lower than Tline, the oxygen content of the sample can not increase efficiently. The effects of temperature and time of Ar, O2 post-treatment on superconducting properties of Nd-123 are discussed on the basis of thermodynamic diffusion theory.",

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AU - Wu, Ruiheng

AU - Zhou, Lian

AU - Feng, Yong

PY - 2000/2

Y1 - 2000/2

N2 - The effects of different (Ar, O2) post-treatments on the superconducting properties of Nd-123 fabricated by the Powder-Melting Process (PMP) in air are discussed. The results indicate that the post-treatments at high temperatures in Ar firstly enable PMP Nd-123 sample to absorb more oxygen in subsequent O2 treatment, and hence improve its superconducting properties - sharpening ΔT and increasing Jt. There is a limitating temperature, Tline(∼600°C), for low temperature post-treatments in pure O2. When the annealing temperature in O2 is much higher or lower than Tline, the oxygen content of the sample can not increase efficiently. The effects of temperature and time of Ar, O2 post-treatment on superconducting properties of Nd-123 are discussed on the basis of thermodynamic diffusion theory.

AB - The effects of different (Ar, O2) post-treatments on the superconducting properties of Nd-123 fabricated by the Powder-Melting Process (PMP) in air are discussed. The results indicate that the post-treatments at high temperatures in Ar firstly enable PMP Nd-123 sample to absorb more oxygen in subsequent O2 treatment, and hence improve its superconducting properties - sharpening ΔT and increasing Jt. There is a limitating temperature, Tline(∼600°C), for low temperature post-treatments in pure O2. When the annealing temperature in O2 is much higher or lower than Tline, the oxygen content of the sample can not increase efficiently. The effects of temperature and time of Ar, O2 post-treatment on superconducting properties of Nd-123 are discussed on the basis of thermodynamic diffusion theory.

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KW - PMP

KW - Thermodynamic diffusion theory

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JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

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Effects of Different Post-Treatments on Superconducting Properties of Nd-123 Fabricated by PMP in Air

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