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US 5,346,883 AGranted
Method of manufacturing superconductive products
AssigneeFurukawa Electric Co., Ltd.
InventorsShoji Shiga, Naoki Uno, Yasuzo Tanaka
Life of this patent
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Abstract
The present invention provides a method of manufacturing superconductive products comprising heating a superconductive matter or incorporation including its precursor to a temperature higher than its or its precursor's melting point to melt it or its precursor, and then solidifying and cooling it in a direction in such a way that it is re-crystalized to have an orientation in the longitudinal direction of its incorporation.
Claims20
A method of manufacturing a superconductive product comprising:
- heating a longitudinally elongated body comprising a superconductive material selected from the group consisting of BiSrCaCu.sub.2 O.sub.y and Tl.sub.2 Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.z to a temperature higher than the melting point of the superconductive material, thereby melting the superconductive material and obtaining a molten superconductive material;
- and
- continuously passing said elongated body through a furnace having a temperature gradient from a high temperature region in the furnace toward a low temperature region in an outlet of the furnace, the temperature gradient being 100.degree. C./cm, wherein the temperature in the outlet of the furnace is lower then the melting point of the superconductive material, so as to cool the molten superconductive material in the longitudinal direction of said elongated body, wherein an average cooling rate for cooling the molten superconductive material is 1.degree. C./minute, thereby solidifying and recrystallizing the superconductive material along said elongated body such that the a-axis or the b-axis of each crystal of the superconductive material is oriented in the longitudinal direction of said elongated body.
A method of manufacturing a superconductive product comprising:
- heating a longitudinally elongated body comprising a precursor of a superconductive material selected from the group consisting of BiSrCaCu.sub.2 O.sub.y and Tl.sub.2 Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.z to a temperature higher than the melting point of said precursor, thereby melting said precursor and obtaining a molten precursor;
- and then
- continuously passing said elongated body through a furnace having a temperature gradient from a high temperature region in the furnace toward a low temperature region in an outlet of the furnace, the temperature gradient being 100.degree. C./cm, wherein the temperature in the outlet of the furnace is lower then the melting point of the superconductive material, so as to cool the molten superconductive material in the longitudinal direction of said elongated body, wherein an average cooling rate for cooling the molten superconductive material is 1.degree. C./minute, thereby converting said precursor into a superconductive material and solidifying and recrystallizing the superconductive material along said elongated body such that the a-axis or the b-axis of each crystal of the superconductive material is oriented in the longitudinal direction of said elongated body.
Dependencies are inferred from the claim text.