Ti doping on the flux pinning and chemical stability against water of MgB₂ bulk material

Research output: Contribution to journal › Conference article

Original language	English
Pages (from-to)	581-587
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	386
DOIs	https://doi.org/10.1016/S0921-4534(02)02166-4
Publication status	Published - 2003 Apr 15
Event	ICMC 2002 - Xi an, China Duration: 2002 Jun 16 → 2002 Jun 20

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Keywords

Critical current density
MgB
Microstructure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Cite this

Zhao, Y., Cheng, C. H., Feng, Y., Machi, T., Huang, D. X., Zhou, L., Koshizuka, N., & Murakami, M. (2003). Ti doping on the flux pinning and chemical stability against water of MgB₂ bulk material. Physica C: Superconductivity and its applications, 386, 581-587. https://doi.org/10.1016/S0921-4534(02)02166-4

@article{76fc561c78ab4014a190f564a2dd49ac,

title = "Ti doping on the flux pinning and chemical stability against water of MgB2 bulk material",

abstract = "Ti-doped MgB2 superconductors with different doping levels were prepared by solid-state reaction at ambient pressure. Jc of the samples changes with the doping level, with the best result achieved at x = 0.1. At 5 K, the Jc reaches 2 × 106 A/cm2 in the self-field. In addition, degradation in water of Jc and irreversibility field (Hirr) of MgB2 bulks is significantly reduced by Ti doping. Microstructural analysis reveals that Ti mainly forms a thin TiB2 layer in the grain boundaries of MgB2. At the same time MgB2 grains are greatly refined, forming a strongly coupled nanoparticle structure. Our results show that the unique microstructure of the MgB2 nanoparticles with TiB2 nanograin boundaries may take the responsibility for the enhancement of the flux pinning and the chemical stability against water.",

keywords = "Critical current density, MgB, Microstructure",

author = "Y. Zhao and Cheng, {C. H.} and Y. Feng and T. Machi and Huang, {D. X.} and L. Zhou and N. Koshizuka and M. Murakami",

year = "2003",

month = apr

day = "15",

doi = "10.1016/S0921-4534(02)02166-4",

language = "English",

volume = "386",

pages = "581--587",

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

issn = "0921-4534",

publisher = "Elsevier",

note = "ICMC 2002 ; Conference date: 16-06-2002 Through 20-06-2002",

}

TY - JOUR

T1 - Ti doping on the flux pinning and chemical stability against water of MgB2 bulk material

AU - Zhao, Y.

AU - Cheng, C. H.

AU - Feng, Y.

AU - Machi, T.

AU - Huang, D. X.

AU - Zhou, L.

AU - Koshizuka, N.

AU - Murakami, M.

PY - 2003/4/15

Y1 - 2003/4/15

N2 - Ti-doped MgB2 superconductors with different doping levels were prepared by solid-state reaction at ambient pressure. Jc of the samples changes with the doping level, with the best result achieved at x = 0.1. At 5 K, the Jc reaches 2 × 106 A/cm2 in the self-field. In addition, degradation in water of Jc and irreversibility field (Hirr) of MgB2 bulks is significantly reduced by Ti doping. Microstructural analysis reveals that Ti mainly forms a thin TiB2 layer in the grain boundaries of MgB2. At the same time MgB2 grains are greatly refined, forming a strongly coupled nanoparticle structure. Our results show that the unique microstructure of the MgB2 nanoparticles with TiB2 nanograin boundaries may take the responsibility for the enhancement of the flux pinning and the chemical stability against water.

AB - Ti-doped MgB2 superconductors with different doping levels were prepared by solid-state reaction at ambient pressure. Jc of the samples changes with the doping level, with the best result achieved at x = 0.1. At 5 K, the Jc reaches 2 × 106 A/cm2 in the self-field. In addition, degradation in water of Jc and irreversibility field (Hirr) of MgB2 bulks is significantly reduced by Ti doping. Microstructural analysis reveals that Ti mainly forms a thin TiB2 layer in the grain boundaries of MgB2. At the same time MgB2 grains are greatly refined, forming a strongly coupled nanoparticle structure. Our results show that the unique microstructure of the MgB2 nanoparticles with TiB2 nanograin boundaries may take the responsibility for the enhancement of the flux pinning and the chemical stability against water.

KW - Critical current density

KW - MgB

KW - Microstructure

UR - http://www.scopus.com/inward/record.url?scp=0037445656&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037445656&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(02)02166-4

DO - 10.1016/S0921-4534(02)02166-4

M3 - Conference article

AN - SCOPUS:0037445656

VL - 386

SP - 581

EP - 587

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

T2 - ICMC 2002

Y2 - 16 June 2002 through 20 June 2002

ER -

Access to Document

10.1016/S0921-4534(02)02166-4