Processing and superconducting properties of highly textured Bi(Pb)-2223 ceramics by sinter-forging

Rouessac, V.; Wang, J; Provost, J.; Desgardin, G.

doi:10.1016/0921-4534(96)00423-6

Cited by 29 publications

(24 citation statements)

References 17 publications

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“…For the CS processing, the pellet was sintered at 920 • C for 24 h without any applied stress. In the case of the HP technique, the samples were processed using a home made hot-pressing furnace described elsewhere [12], by applying a thermo-mechanical cycle illustrated in Fig. 1.…”

Section: Sample Preparationmentioning

confidence: 99%

Texture, mechanical and thermoelectric properties of Ca3Co4O9 ceramics

Kenfaui

Chateigner

Gomina

et al. 2010

Journal of Alloys and Compounds

100

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Section: Sample Preparationmentioning

confidence: 99%

Texture, mechanical and thermoelectric properties of Ca3Co4O9 ceramics

Kenfaui

Chateigner

Gomina

et al. 2010

Journal of Alloys and Compounds

100

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“…The powders were coldpressed into 2 mm thick and 25 mm diameter pellets, under uniaxial pressure of 23 MPa, which resulted in a green density of 60% of the theoretical value. The pellets were then placed in the furnace [18] between two 0.125 mm silver sheets to avoid reaction with the alumina supports during heating. The pressure employed during heating was fixed at 10 MPa and the operating temperature ranged between 838 • C and 855 • C. The temperature should be sufficiently high to limit the Bi2223 decomposition which occurs below 822 • C under air at ambient pressure.…”

Section: Methodsmentioning

confidence: 99%

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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“…However, Rouessac showed [114] that larger thickness can be obtained by superposition of several discs. A short-time sinter forging allows the different discs to be soldered without any degradation of the texture quality.…”

Section: Hot Pressing Texturing: Sinter Forging (Creep Sintering)mentioning

confidence: 99%

The antipode theorem and points of coincidence

Гельман¹

1996

Russ. Math. Surv.

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Most of the potential applications of the high-temperature superconductors require large critical currents, much higher than those obtained using a classical sintering process. This paper reviews different processes and corresponding recent results in the field of texturing high-T c superconductors in order to align and develop the planes where the current flows easily. Different melt-textured growth methods are discussed from both theoretical and practical viewpoints, and the limitations associated with the diffusion and interface phenomena are introduced. Influence of the process parameters, as well as the microstructure of the precursors and the use of additives in order to enlarge the single domain size and to optimise the superconducting characteristics is discussed. Mechanical texturing and texturing under a magnetic field, as well as combination of both processes, are also considered. Recent results, which appear to be an important breakthrough for the industrial development because of the large crystallization rates are also mentioned.

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Processing and superconducting properties of highly textured Bi(Pb)-2223 ceramics by sinter-forging

Cited by 29 publications

References 17 publications

Texture, mechanical and thermoelectric properties of Ca3Co4O9 ceramics

Texture, mechanical and thermoelectric properties of Ca3Co4O9 ceramics

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

The antipode theorem and points of coincidence

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Processing and superconducting properties of highly textured Bi(Pb)-2223 ceramics by sinter-forging

Cited by 29 publications

References 17 publications

Texture, mechanical and thermoelectric properties of Ca3Co4O9 ceramics

Texture, mechanical and thermoelectric properties of Ca3Co4O9 ceramics

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

The antipode theorem and points of coincidence

Contact Info

Product

Resources

About

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