Effect of Pt Addition on Melt-Processed YBaCuO Superconductors

Morita, Mitsuru; Tanaka, Masamoto; Takebayashi, S.; Kimura, Kazuhiro; Miyamoto, K.; Sawano, Kiyoshi

doi:10.1143/jjap.30.l813

Cited by 103 publications

(34 citation statements)

References 4 publications

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“…The temperature behavior is proportional to the Ta molar fraction, as described in Eq. (6). It is suggested that the YTaBa phase is extremely diluted in the Y123 matrix and, as a direct consequence, the decrease in the peritectic temperature is clearly deduced.…”

Section: Resultsmentioning

confidence: 93%

“…Various investigations have focused on the melt process of the Y123 oxides [3]. It has been previously reported [4][5][6][7][8][9] that both alignment of grains and decreased grain boundaries are responsible for some improvements on the J c (critical current density).…”

Section: Introductionmentioning

confidence: 99%

“…fine precipitates, grain boundaries, etc. It is known that these crystalline defects constitute the pinning center, which improves the J c [6,7]. Some investigations were also conducted in order to verify the doping effect on the oriented grain growth, the critical current density and the critical temperature T c in the Y123 polycrystalline samples [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improvement on the melt-texturing performance of a (Y,Ta)0.5BaO3–YBa2Cu3Oy composite with superconductor applications

Bortolozo

Osório

Oliveira

et al. 2015

Ceramics International

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improvement on the melt-texturing performance of a (Y,Ta)0.5BaO3–YBa2Cu3Oy composite with superconductor applications

Bortolozo

Osório

Oliveira

et al. 2015

Ceramics International

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“…This was just before discovery of Bi-based superconducting material by Dr. Maeda et al [10]. Later on, it was revealed that a small amount of Pt resulted in fine 211 particles about 1μm in size [11][12][13].…”

Section: History Of Qmg and Qmg Bulk Magnetsmentioning

confidence: 99%

History and recent progress of QMG™ and QMG bulk magnets

Morita

2018

J. Phys.: Conf. Ser.

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Abstract. The microstructure of QMG consists of a single crystal REBa 2 Cu 3 O x phase and fine RE 2 BaCuO 5 particles. Y-based QMG was first produced in 1988 by the Quench and Melt Growth method. A bulk magnet made from QMG was proposed in 1989. QMG bulk magnets were realized by enlargement technology using RE substitute seed crystals. Based on these technological innovations, the development of NMR and MDDS, which are product-based applications of bulk magnets, has recently been reported from the research institutes of applied development. The history of the initial development of these QMG materials and QMG bulk magnets was reviewed. In addition, as progress of the recent QMG bulk magnet development, a new reinforcement method for large ring bulk magnets that can trap 10 T class strong magnetic field magnetization has been reported. For high field magnetization, the reinforcement of bulk magnets is essential to prevent cracking due to large hoop force. Compared to the conventional reinforcement method using only the outer metal ring, the new reinforcement method has been developed using thin QMG rings and metal ring sheets as the composite material with the inner and outer metal rings. In the case of the QMG ring reinforced by the conventional method, cracking occurred at 10T magnetization. Whereas the QMG ring created by the new reinforcement method successfully trapped approximately 10 T.

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“…[2] In the melt-quenched powders, platinum is obtained through dissolution of the platinum crucible by the liquid melt. Since this is not possible in the non-quenched powders, a fine platinum powder is added prior to melt quenching.…”

Section: Fig 1 Single Crysmentioning

confidence: 99%

Evaluation of YBa/sub 2/Cu/sub 3/O/sub 7-x/ bulk superconductors for high field magnet applications

Blohowiak

Garrigus

Luhman

et al. 1993

IEEE Trans. Appl. Supercond.

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Processing of YBCO single crystals was carried out by solidification of semi-liquid YBCO composition using a seeding technique. Microstructural characterization of the pinning centers was investigated by TEM. Characterization of single crystals was carried out, relating grain size and shape to the corresponding flux profiles. Current densities were calculated based on measured trapped fields. Once circulating currents were established, flux pumping and quenching experiments were conducted. These large single crystals will be incorporated into electromagnetic forming devices for use in the military and commercial aircraft manufacturing and service industries.

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Effect of Pt Addition on Melt-Processed YBaCuO Superconductors

Cited by 103 publications

References 4 publications

Improvement on the melt-texturing performance of a (Y,Ta)0.5BaO3–YBa2Cu3Oy composite with superconductor applications

Improvement on the melt-texturing performance of a (Y,Ta)0.5BaO3–YBa2Cu3Oy composite with superconductor applications

History and recent progress of QMG™ and QMG bulk magnets

Evaluation of YBa/sub 2/Cu/sub 3/O/sub 7-x/ bulk superconductors for high field magnet applications

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