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The authors report on the development of a mechanically textured, low porosity Bi-2212 ribbon. The ribbons are fabricated by compacting fine-powder Bi-2212 in a counterrotating roll set. Microstructure and texture of the as rolled ribbons are reported and compared to green-state cores from multifilament wires processed using the oxide-powder in-tube process.

Specimens of cold-pressed, highly textured Bi-2212 powders were subjected to sintering heat treatments to evaluate the impact of sintering upon texture, density, connectivity, microstructure, and growth of parasitic phases. A regime of non-melt sintering parameters were identified that produce near-solid density, strong texture, extensive growth of the Bi-2212 phase in the textured a-b planes, and no significant growth of parasitic phases. This favorable regime is stable over a sintering temperature range from 865 °C -875 °C. The results establish one element of our strategy for fabrication of highperformance Bi-2212/Ag wire using textured powder in a 'jelly-roll' configuration.

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