Abstract
Bi2Sr2CaCu2Ox glass and glass fibers were prepared by a conventional melt-quenching method and fiber drawing from a glass plate respectively, and grain orientation behavior of superconducting glass-ceramics and fibers obtained by annealing was examined. At the surface and in the interior of the glass-ceramic fiber, all c-axes oriented parallel to the direction of fiber length. In the bulk glass-ceramics, the oriented grains grew from the surface to the interior of the bulk and the morphology and thickness of the oriented layer were very sensitive to the annealing atmosphere. It is concluded that the oriented layers at the surface were formed by precipitation of the Bi2Sr2CaCu2Ox phase with release of oxygen absorbed during heating.
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