Fabrication of single domain GdBCO bulk superconductors by a new modified TSIG technique

Yang, Wan‐Min; Zhi, Xu; Chen, S.L.; Wang, M.; Li, J.W.; Ma, Jan; Chao, Xiaolian

doi:10.1016/j.physc.2013.06.008

Cited by 37 publications

(22 citation statements)

References 16 publications

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“…As can be seen, the highest levitation force of the drilled SmBCO sample reached 66.3 N, and the density of the levitation force was close to 8.24 N/cm 2 . This result indicates that the drilled single domain SmBCO bulk superconductor had a slightly lower performance compared with the normal REBCO (RE = Y, Gd, and Sm) bulk superconductor fabricated at SNNU [24][25][26]. This may be because the sub-domain boundaries from the surface near the holes exist as the specific surface area increases.…”

Section: The Superconducting Properties Of the Drilled Single Domain Smbco Bulk Superconductormentioning

confidence: 95%

Influence of Artificially Macroscopical Drilling on the Crystal Growth Orientation of Single Domain SmBCO Bulk Superconductor

et al. 2021

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A large drilled single domain SmBa2Cu3O7−δ (SmBCO) bulk superconductor with a diameter of 32 mm and different hole sizes was successfully fabricated using the modified top-seeded infiltration and growth (TSIG) process. The morphology, superconducting properties, and grain boundary orientation growth of the drilled SmBCO samples were investigated. It was found that not only are the properties of the drilled sample equivalent to those of normal SmBCO bulk superconductors, but also the NdBCO seed crystal can be well controlled because of the increase in the specific surface area in the solid phase pellet. In addition, the growth orientation along the tangent direction of the holes was first noticed in the drilled single domain SmBCO bulk superconductor. This conclusion is highly important for the accurate control of the growth temperature of high temperature bulk superconductors.

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Section: The Superconducting Properties Of the Drilled Single Domain Smbco Bulk Superconductormentioning

confidence: 95%

Influence of Artificially Macroscopical Drilling on the Crystal Growth Orientation of Single Domain SmBCO Bulk Superconductor

et al. 2021

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“…In order to reduce the cost and simplify the fabrication process, we have invented a new RE + 011 TSIG method to fabricate single-domain REBCO superconductor by using only one precursor powder BaCuO 2 (011) [11][12][13][14][15]. e traditional solid phase RE211 and the traditional liquid phase (REBa 2 Cu 3 O 7-y and Ba 3 Cu 5 O 8 ) are, respectively, replaced with the new solid phase (RE 2 O 3 + xBaCuO 2 ) and Y 2 O 3 + 6CuO + 10BaCuO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…is method has a considerable number of advantages, for example, improving the production efficiency, reducing the preparation cost, simplifying the experiment process, and enhancing the physical properties of REBCO bulk compared with the traditional TSIG ways. However, the size of the Gd211 particle is significantly larger in the single-domain GdBCO samples prepared by the Gd + 011 TSIG method [11]. Now, the question arises how to reduce the size of Gd211 particles and improve the physical properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of Gd211 Particles Characteristic in the Precursor Pellets on the Levitation Force of Single‐Domain GdBCO Bulks Prepared by the Gd + 011 TSIG Method

Yuan

Yang

2018

Advances in Materials Science and Engineering

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In this paper, single-domain GdBCO bulks have been fabricated by a new Gd + 011 TSIG method with precursor solid phase pellets (PSPPs) of different Gd211 particle sizes and distributions, prepared by solid state reaction with well-mixed (Gd2O3 + BaCuO2) pellets at different temperatures. The novel results indicated that (1) the average size of Gd211 particles in PSPP is monotonically increasing with increasing the sintering temperature up to 1200°C. (2) With increasing the sintering temperature from 950 to 1200°C, the porous ratio and the density of the PSPP are, respectively, monotonically decreasing and increasing. Furthermore when the sintering temperature is less than 1000°C, the porous ratio is higher and the density is lower than the values of the pressed pellets. (3) With increasing the sintering temperature, the average size of Gd211 particles in the GdBCO bulk first decreases and then increases. In addition, the smallest Gd211 particles are obtained in the sample sintered at 1050°C. (4) The maximum levitation force is obtained in the sample sintered at 1150°C with a relatively larger size of Gd211 particles and lower porosity. This result is significant when fabricating high-quality GdBCO bulk superconductors by controlling the porosity, Gd211 particle size, and their distribution characteristic.

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“…Three separate precursor powders (Y-211, Y-123 and Ba 3 Cu 5 O 8 or BaCuO 2 ) are usually required in a conventional TSIG process [16,17], although Li et al [18] recently proposed a modified TSIG process based on the use of only two precursor powders (Y-211 and BaCuO 2 ). Yang et al [19,20] further developed the modified TSIG process in which BaCuO 2 is the only required prereacted precursor powder. These studies indicate that pure phase Y-211 and Y-123 precursor powders are not essential to achieve a complete peritectic reaction and the subsequent growth of YBCO single grains in a seeded melt process, and that it is possible to use a mixture of raw oxides, from which Y-123 and Y-211 form via chemical reaction during melt processing, rather than pure Y-123 and Y-211 to fabricate large YBCO single grains.…”

Section: Introductionmentioning

confidence: 99%

A novel pre-sintering technique for the growth of Y–Ba–Cu–O superconducting single grains from raw metal oxides

Shi

Dennis

et al. 2017

Supercond. Sci. Technol.

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Most established top seeded melt growth (TSMG) processes of bulk, single grain Y-Ba-Cu-O (YBCO) superconductors are performed using a mixture of pre-reacted precursor powders. Here we report the successful growth of large, single grain YBCO samples by TSMG with good superconducting properties from a simple precursor composition consisting of a sintered mixture of the raw oxides. The elimination of the requirement to synthesize precursor powders in a separate process prior to melt processing has the potential to reduce significantly the cost of bulk superconductors, which is essential for their commercial exploitation. The growth morphology, microstructure, trapped magnetic field and critical current density, J c , at different positions within the sample and maximum levitation force of the YBCO single grains fabricated by this process are reported. Measurements of the superconducting properties show that the trapped filed can reach 0.45 T and that a zero field J c of 2.5 × 10 4 A cm −2 can be achieved in these samples. These values are comparable to those observed in samples fabricated using pre-reacted, high purity commercial oxide precursor powders. The experimental results are discussed and the possibility of further improving the melt process using raw oxides is outlined.

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Fabrication of single domain GdBCO bulk superconductors by a new modified TSIG technique

Cited by 37 publications

References 16 publications

Influence of Artificially Macroscopical Drilling on the Crystal Growth Orientation of Single Domain SmBCO Bulk Superconductor

Influence of Artificially Macroscopical Drilling on the Crystal Growth Orientation of Single Domain SmBCO Bulk Superconductor

Effects of Gd211 Particles Characteristic in the Precursor Pellets on the Levitation Force of Single‐Domain GdBCO Bulks Prepared by the Gd + 011 TSIG Method

A novel pre-sintering technique for the growth of Y–Ba–Cu–O superconducting single grains from raw metal oxides

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