Microstructural and transport properties of high Jc Bi(2223)/Ag tapes

Yamada, Yutaka; Xu, Jiaojiao; Kessler, J.; Seibt, E.; Goldacker, W.; Jahn, Wolfgang; Flükiger, R.

doi:10.1016/0921-4534(91)91366-c

Cited by 27 publications

(12 citation statements)

References 3 publications

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“…Similar results were demonstrated in an in situ neutron diffraction study on a multifilamentary tape under 8% O 2 by Fahr et al [27]. They found, as had many authors [28,29], that initially the Bi2223 grains form near the silver interface where they form colonies of well-aligned grains. By increasing the annealing time, Bi2223 grains in the core of the filament appear which are characterized by an inferior degree of alignment.…”

Section: Discussionsupporting

confidence: 85%

Experimental Corroboration for a Ferrite-Core Model of High-T_c Bulk Superconductor Lenses (Supertrons)

Matsuzawa

Kobayashi

Mochizuki

et al. 1994

Jpn. J. Appl. Phys.

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Dense Bi2223 superconductor discs with a highly oriented structure were prepared by the sinter-forging method. A detailed investigation of the processing parameters has been carried out on the phase assemblage, the particle size of the calcined precursor powder and the sinter-forging time and temperature. A high transport critical current density, J c , was obtained from a starting powder rich in Bi2212 and secondary phases. Using fine powder, a high degree of orientation, larger than those of multifilamentary tapes, and excellent intergrain connection were observed. The optimal sinter-forging temperature was found to be in the range of 845-850 • C and the transport critical current densities reached values of 12 700 A cm −2 at 77 K in self-field. The combination of textural and microstructural investigations testify that a nucleation-growth mechanism from the Bi2212 particles is responsible for the Bi2223 phase formation, rather than an intercalation process.

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Section: Discussionsupporting

confidence: 85%

Experimental Corroboration for a Ferrite-Core Model of High-T_c Bulk Superconductor Lenses (Supertrons)

Matsuzawa

Kobayashi

Mochizuki

et al. 1994

Jpn. J. Appl. Phys.

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“…The starting powder has been shown to greatly affect J c [6]. The fabrication of long Ag-Bi(2223) tape needs the manufacture of BiPbSrCaCuO powder with high homogeneity, ultrafine particles and low carbon content in large quantities [7]. The polymeric solution-solgel (SSG) process can realize molecular-level homogeneity in powder in principle, but cannot manufacture powder in large quantities, and, since there is more than one metallic cation involved in the SSG transition, some metallic salts are always preferentially saturated and precipitated out in the later period of SSG.…”

Section: Introductionmentioning

confidence: 99%

The combination of the polymeric solution - sol - gel process and combustion synthesis to manufacture BiPbSrCaCuO powder

Mao

Zhou

et al. 1996

Supercond. Sci. Technol.

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The polymeric solution-sol-gel (SSG) process has been greatly improved by combination of the high homogeneity of SSG and the high efficiency of combustion synthesis to manufacture BiPbSrCaCuO powder with high homogeneity, ultrafine particles and low carbon content for fabrication of high-J c silver-sheathed bismuth-based 2223 superconducting tape. The improved SSG, termed solution-sol-gel-SHS (SSGS), is realized by ignition of homogeneous wet gel derived from polymeric SSG. X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infared spectroscopy (FTIR) are used to optimize the SSG process and investigate the mechanism of the SSG transition.

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“…More importantly, though, melt processing has been shown to be highly effective at producing well textured material. In melt processed Bi2223 tapes, it is thought that a reaction at the Ag/oxide interface is responsible for the texture, although at present this is poorly understood [3].…”

Section: Parti Partial Liquid Phase Equilibru In the Bi-sr-ca-cu-o-agmentioning

confidence: 99%

High temperature phase equilibria studies in the Bi-Sr-Ca-Cu-O-Ag system

Margulies

1999

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A variety of experimental techniques were utilized to examine the high temperature phase equilibria in the Bi-Sr-Ca-Cu-O-Ag systemu Quenching studies were used to determine the b'quid solubility of Ag in the Bi2Sr2CaCu20g (Bi2212) melt and the details of the peritectic decomposition pathway of Bi22I2 as a function on Ag content and oxygen partial pressure (PO2). A liquid immiscibility region between oxide and Ag liquids in the 8-98 at% range was found above 900''C. Two eutectics were found in the Bi2212-Ag pseudobinary. On the oxide rich side, a eutectic exists at approximately 4 at% Ag. On the Ag rich side, a eutectic exists at approximately 98 at% Ag at a temperature of IS'C below the mehing point of pure Ag. Six distinct solid phases were found to be in equilibrium with the partial melt within the Ag content and PO2 range studied. The stability of these solid phases

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Microstructural and transport properties of high Jc Bi(2223)/Ag tapes

Cited by 27 publications

References 3 publications

Experimental Corroboration for a Ferrite-Core Model of High-T_c Bulk Superconductor Lenses (Supertrons)

Experimental Corroboration for a Ferrite-Core Model of High-T_c Bulk Superconductor Lenses (Supertrons)

The combination of the polymeric solution - sol - gel process and combustion synthesis to manufacture BiPbSrCaCuO powder

High temperature phase equilibria studies in the Bi-Sr-Ca-Cu-O-Ag system

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Microstructural and transport properties of high Jc Bi(2223)/Ag tapes

Cited by 27 publications

References 3 publications

Experimental Corroboration for a Ferrite-Core Model of High-Tc Bulk Superconductor Lenses (Supertrons)

Experimental Corroboration for a Ferrite-Core Model of High-Tc Bulk Superconductor Lenses (Supertrons)

The combination of the polymeric solution - sol - gel process and combustion synthesis to manufacture BiPbSrCaCuO powder

High temperature phase equilibria studies in the Bi-Sr-Ca-Cu-O-Ag system

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Product

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Experimental Corroboration for a Ferrite-Core Model of High-T_c Bulk Superconductor Lenses (Supertrons)

Experimental Corroboration for a Ferrite-Core Model of High-T_c Bulk Superconductor Lenses (Supertrons)