Reactivity and oxygen diffusion property of resistive barriers for Bi-2223/Ag tapes

Kòváč, Pavol; Hušek, I

doi:10.1016/s0921-4534(02)01258-3

Cited by 3 publications

(1 citation statement)

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“…Oxygen diffusion during the final heat treatment is important in order to achieve better superconducting properties in silver clad superconducting conductors [15,16]. Coated layers will inevitably form a barrier for oxygen diffusion both ways, in and out [17].…”

Section: Introductionmentioning

confidence: 99%

Insulation coating of silver tapes using an organometallic solution of Zr and Ca for application to Bi-based superconductors

Belenli

Türkoğlu

2002

Supercond. Sci. Technol.

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Silver tapes were spray coated using an organometallic solution as the carrier liquid. When this solution was annealed in air at 825 • C, ∼4% of its total weight remained as CaZrO 3 . Mixtures of Bi 2 O 3 , SrCO 3 and CaCO 3 have been prepared with seven different stoichiometries. An organometallic solution was mixed with ceramic oxide powders and spray coated onto silver tapes. Electrical insulation tests were performed applying a dc potential, and insulation survived more than 30 V. Coated tapes were coiled to progressively decreasing diameters down to 1 mm diameter with no sign of cracking, indicating the possibility of metallic bonding and diffusion. This technique appears to be suitable for use in the insulation of Bi-based superconducting tapes and wires, since it does not contain any element that is chemically reactive to this system.

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Section: Introductionmentioning

confidence: 99%