Preparation of the textured Bi-based oxide tapes by partial melting process

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5767324

Kase, J; Morimoto, T ^[1]; Tagano, K; Kumakura, H; Dietderich, D R; Maeda, H ^[2]

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1. Asahi Glass Co. Ltd., Yokohama (Japan). Research Lab.
2. National Research Inst. for Metals, Tsukuba, Ibaraki (Japan). Tsukuba Lab.

This paper reports on Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub x} textured tapes with an excellent J{sub c} prepared by doctor-blade casting and a partial melt process. A green tape, composed of Bi{sub 2}Sr{sub 2}Cu{sub 1}O{sub x} powder and organic formulation was laid on a silver foil and heat treated. A highly textured microstructure was formed during slow cooling between 890{degrees}C and 870{degrees}C. XRD and SEM observation indicated that initially an oriented Bi{sub 2}Sr{sub 2}Cu{sub 2}O{sub x} structure forms by growth from the melt and it subsequently transforms to the Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub x} phase. A grain alignment was significantly enhanced in oxide layer with a thickness less than 20{mu}m. Silver dissolved in the oxide from substrate also plays an important role for the grain alignment by lowering the melting point of the oxide.

• OSTI ID: 5767324
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENT DENSITY
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
FABRICATION
MELTING
METALS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHASE TRANSFORMATIONS
QUENCHING
SILVER
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TEXTURE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS