Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
313 words
A method for manufacturing a superconducting article, characterized by comprising the steps of: forming a first layer comprising a mixture of LnBa₂Cu₃O x and Ln₂BaCuO x on the surface of a substrate, said Ln being an optional rare earth element, and the content ratio of said Ln₂BaCuO x in said first layer being within the range of from 5 to 80 wt.% relative to the total amount of LnBa₂Cu₃O x and Ln₂BaCuO x ; then locally and sequentially heating and melting said first layer to locally and sequentially form a molten pool of said mixture of said first layer, and causing said molten pool of said first layer to locally and sequentially solidify, thereby arranging the a-b plane of the crystal of said mixture of said first layer in parallel with the surface of said substrate; then forming a second layer comprising a mixture of at least CuO and BaCuO₂ on the surface of said first layer, said second layer having a melting point within the range of from 800 to 1,000°C, which is lower than the melting point of said first layer; then melting said mixture of said second layer, and keeping the molten state of said second layer for a period of time of from 1 minute to 4 hours in an oxygen-containing atmosphere to cause the resultant melt of said mixture of said second layer to diffusion-react with Ln₂BaCuO x in said first layer, thereby converting said first layer and said second layer into a film of a superconducting substance comprising LnBa₂Cu₃O x , in which the a-b plane of the crystal thereof is arranged in parallel with the surface of said substrate; and then cooling said film of said superconducting substance thus produced to a room temperature, thereby manufacturing a superconducting article comprising said substrate and said film of said superconducting substance formed on the surface of said substrate.
Claim 2
Independent Claim
313 words
A method for manufacturing a superconducting article, characterized by comprising the steps of: forming a first layer comprising a mixture of LnBa₂Cu₃O x and Ln₂BaCuO x on the surface of a substrate, said Ln being an optional rare earth element, and the content ratio of said Ln₂BaCuO x in said first layer being within the range of from 5 to 80 wt.% relative to the total amount of LnBa₂Cu₃O x and Ln₂BaCuO x ; then locally and sequentially heating and melting said first layer to locally and sequentially form a molten pool of said mixture of said first layer, and causing said molten pool of said first layer to locally and sequentially solidify, thereby arranging the a-b plane of the crystal of said mixture of said first layer in parallel with the surface of said substrate; then forming a second layer comprising a mixture of at least CuO and BaCuO₂ on the surface of said first layer, said second layer having a melting point within the range of from 800 to 1,000°C, which is lower than the melting point of said first layer; then melting said mixture of said second layer, and keeping the molten state of said second layer for a period of time of from 1 minute to 4 hours in an oxygen-containing atmosphere to cause the resultant melt of said mixture of said second layer to diffusion-react with Ln₂BaCuO x in said first layer, thereby converting said first layer and said second layer into a film of a superconducting substance comprising LnBa₂Cu₃O x , in which the a-b plane of the crystal thereof is arranged in parallel with the surface of said substrate; and then cooling said film of said superconducting substance thus produced to a room temperature, thereby manufacturing a superconducting article comprising said substrate and said film of said superconducting substance formed on the surface of said substrate.
Claim 3
Dependent Claim
20 words
The method as claimed in Claim 1, wherein: said substrate comprises any one of ceramics, silver, nickel and nickel-based alloy.
Claim 4
Dependent Claim
51 words
The method as claimed in Claim 1 or 2, wherein: said second layer comprises a mixture of CuO, BaCuO₂ and BaO; and the ratio of copper (Cu) to barium (Ba) in said second layer is within the range of Cu : Ba = 1 : 0.10 to 0.95 in molar ratio.
Claim 5
Dependent Claim
62 words
The method as claimed in Claim 1 or 2, wherein: said second layer comprises a mixture of CuO, BaCuO₂, BaO, Y₂O₃ and YBa₂Cu₃O₇; and the ratio of copper (Cu) to barium (Ba) and yttrium (Y) in said second layer is within the range of Cu : Ba : Y = 1 : 0.10 to 0.95 : 0.001 to 0.330 in molar ratio.