Influences of heat treatment and doping on microstructure and superconducting properties of MgB2 superconductor

G. Yan; Y. Feng; Y. F. Lu; L. Zhou; W. X. Jing; H. H. Wen

doi:10.1016/j.physc.2006.04.038

Influences of heat treatment and doping on microstructure and superconducting properties of MgB₂ superconductor

G. Yan, Y. Feng, Y. F. Lu, L. Zhou, W. X. Jing, H. H. Wen

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

1 Scopus citations

Abstract

The microstructure and superconducting properties of pure, Ti and Zr doped MgB₂, which synthesized by solid reaction method. The heat treatment temperature are varied from 650 to 800 °C at ambient pressure. It is found that heat treatment temperature have obvious effect on grain size and MgB₂ grains are greatly refined at 750 °C. Besides, Zr does not occupy the atomic site in the MgB₂ crystal structure, but forms ZrB₂ particles in the MgB₂ matrix. The results of superconducting properties show that Mg_0.9Zr_0.1B₂ have the highest J_c value sintered at 800 °C. It is argued that the microstructure features with good grain connectivity of the Zr doped MgB₂ fabricated at optimize heat treatment temperature may take the responsibility for the enhancement of J_c in Zr-doped MgB₂ bulk superconductor. The results show a good potential to fabricate high performance MgB₂ bulks and wires at ambient pressure on an industrial scale.

Original language	English
Pages (from-to)	466-470
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	445-448
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physc.2006.04.038
State	Published - 1 Oct 2006
Externally published	Yes

Keywords

Critical current
Doping
Heat treatment
MgB
Microstructure

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title = "Influences of heat treatment and doping on microstructure and superconducting properties of MgB2 superconductor",

abstract = "The microstructure and superconducting properties of pure, Ti and Zr doped MgB2, which synthesized by solid reaction method. The heat treatment temperature are varied from 650 to 800 °C at ambient pressure. It is found that heat treatment temperature have obvious effect on grain size and MgB2 grains are greatly refined at 750 °C. Besides, Zr does not occupy the atomic site in the MgB2 crystal structure, but forms ZrB2 particles in the MgB2 matrix. The results of superconducting properties show that Mg0.9Zr0.1B2 have the highest Jc value sintered at 800 °C. It is argued that the microstructure features with good grain connectivity of the Zr doped MgB2 fabricated at optimize heat treatment temperature may take the responsibility for the enhancement of Jc in Zr-doped MgB2 bulk superconductor. The results show a good potential to fabricate high performance MgB2 bulks and wires at ambient pressure on an industrial scale.",

keywords = "Critical current, Doping, Heat treatment, MgB, Microstructure",

author = "G. Yan and Y. Feng and Lu, {Y. F.} and L. Zhou and Jing, {W. X.} and Wen, {H. H.}",

year = "2006",

month = oct,

day = "1",

doi = "10.1016/j.physc.2006.04.038",

language = "英语",

volume = "445-448",

pages = "466--470",

journal = "Physica C: Superconductivity and its Applications",

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TY - JOUR

T1 - Influences of heat treatment and doping on microstructure and superconducting properties of MgB2 superconductor

AU - Yan, G.

AU - Feng, Y.

AU - Lu, Y. F.

AU - Zhou, L.

AU - Jing, W. X.

AU - Wen, H. H.

PY - 2006/10/1

Y1 - 2006/10/1

N2 - The microstructure and superconducting properties of pure, Ti and Zr doped MgB2, which synthesized by solid reaction method. The heat treatment temperature are varied from 650 to 800 °C at ambient pressure. It is found that heat treatment temperature have obvious effect on grain size and MgB2 grains are greatly refined at 750 °C. Besides, Zr does not occupy the atomic site in the MgB2 crystal structure, but forms ZrB2 particles in the MgB2 matrix. The results of superconducting properties show that Mg0.9Zr0.1B2 have the highest Jc value sintered at 800 °C. It is argued that the microstructure features with good grain connectivity of the Zr doped MgB2 fabricated at optimize heat treatment temperature may take the responsibility for the enhancement of Jc in Zr-doped MgB2 bulk superconductor. The results show a good potential to fabricate high performance MgB2 bulks and wires at ambient pressure on an industrial scale.

AB - The microstructure and superconducting properties of pure, Ti and Zr doped MgB2, which synthesized by solid reaction method. The heat treatment temperature are varied from 650 to 800 °C at ambient pressure. It is found that heat treatment temperature have obvious effect on grain size and MgB2 grains are greatly refined at 750 °C. Besides, Zr does not occupy the atomic site in the MgB2 crystal structure, but forms ZrB2 particles in the MgB2 matrix. The results of superconducting properties show that Mg0.9Zr0.1B2 have the highest Jc value sintered at 800 °C. It is argued that the microstructure features with good grain connectivity of the Zr doped MgB2 fabricated at optimize heat treatment temperature may take the responsibility for the enhancement of Jc in Zr-doped MgB2 bulk superconductor. The results show a good potential to fabricate high performance MgB2 bulks and wires at ambient pressure on an industrial scale.

KW - Critical current

KW - Doping

KW - Heat treatment

KW - MgB

KW - Microstructure

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DO - 10.1016/j.physc.2006.04.038

M3 - 文章

AN - SCOPUS:33747887185

SN - 0921-4534

VL - 445-448

SP - 466

EP - 470

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-2

ER -

Influences of heat treatment and doping on microstructure and superconducting properties of MgB₂ superconductor

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Keywords

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