Multi-layer articles and method of making same

A technology for multi-layer products and deposition layers, which can be used in manufacturing tools, chemical instruments and methods, cable/conductor manufacturing, etc. The effect of high density and low impurity density

Inactive Publication Date: 2010-06-02
AMERICAN SUPERCONDUCTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These defects and / or impurities can affect the crystallographic orientation of the epitaxial layer deposited on the surface of the buffer layer (e.g., an epitaxial layer of superconductor material), which may reduce the ability of the resulting multilayer superconductor to exhibit certain superconducting properties

Method used

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  • Multi-layer articles and method of making same
  • Multi-layer articles and method of making same
  • Multi-layer articles and method of making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0164] Prepare a precursor solution as described below. About 51.4gY(CH 3 CO 2 ) 3 4H 2 O was dissolved in about 514 g of water. About 77.6gBa(CH 3 CO 2 ) 2 Dissolved in about 388g of water, about 91gCu(CH 3 CO 2 ) 3 2H 2 O was dissolved in about 1365 g of water. These three solutions are then mixed together. About 243 g of the solution obtained are mixed with about 10 ml of pure trifluoroacetic acid. The solution was dried under vacuum at about 60°C until all solvent was removed and only solids remained. The solid was then dissolved in methanol and diluted to a total volume of about 50 ml to form a precursor solution.

Embodiment 2

[0166] A multilayer article was prepared as follows. The precursor solution prepared in Example 1 was spin-coated on a CeO 2 / YSZ / CeO 2 / Ni buffered substrate.

[0167] The buffered substrate was prepared by rotationally deforming a nickel sample to over about 97% to form a ribbon. Annealing the ribbon at about 1000°C for about 1 hour forms a fine cubic textured material. Using electron beam evaporation and at a temperature of about 625 °C, a CeO with a thickness of about 30 nm 2 Layers were deposited on the textured nickel surface at a rate of about 1 Angstrom / sec. A ~300 nm thick layer of YSZ was deposited at a rate of ~0.5 Å / s on CeO using RF sputtering at a temperature of ~725 °C. 2 layer. Using radio frequency sputtering and at a temperature of about 725 °C, a CeO with a thickness of about 20 nm 2 Layers were deposited on the YSZ layer at a rate of about 0.7 Angstroms / sec. The buffered CeO 2 / YSZ / CeO 2 / Ni substrate cut into two parts.

[0168] The spin coating...

Embodiment 3

[0173] A multilayer article was prepared as follows. The unused part of CeO prepared in embodiment 2 2 / YSZ / CeO 2 The Ni / Ni buffered substrate was incubated at 900° C. for about 1 hour in a gaseous environment with a nominal total gas pressure of forming gas (about 4 vol% hydrogen in argon) of about 760 Torr. The gas environment has approximately 1 x 10 -12 Hold to about 1×10 -16 Torr's nominal oxygen pressure. The precursor solution prepared according to Example 1 was spin-coated on CeO 2 / YSZ / CeO 2 / Ni buffer substrate on the conditioned surface, decomposed and further heated according to Example 2. The resulting YBa was determined by transmission measurements at 77 K in a self-field using a 1 µV / cm standard 2 Cu 3 o 7-x layer has approximately 1.34 x 10 6 The critical current density in amperes / cm².

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Abstract

The invention relates to multi-layer articles and methods of making such articles. The methods include first conditioning an underlying layer, such as a buffer layer or a superconductor layer, then disposing a layer of material on the conditioned termination plane. The conditioned termination plane can be a high quality termination plane. Superconductor articles formed by these methods can exhibitrelatively high critical current densities.

Description

[0001] The present application claims priority under 35 U.S.C. §119(e)(1) to commonly-owned U.S. Provisional Patent Application 60 / 166,1140, filed November 18, 1999, entitled "Multilayer Articles and Methods of Making Same" right. technical field [0002] The present invention relates to multilayer articles, such as multilayer superconductors, and methods of making such multilayer articles. Background technique [0003] Multilayer articles can be used in a variety of applications. For example, superconductors, including oxide superconductors, can be formed from multilayer articles. Typically, such superconductors comprise a layer of superconducting material and a layer, commonly referred to as a substrate, which enhances the mechanical strength of the multilayer article. [0004] In general, the substrate should exhibit some other property besides enhancing the strength of the multilayer superconductor. For example, the substrate should have a low Curie temperature so tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L39/24B22F7/00B22F7/02B23K35/36C30B5/00C30B23/02H01B12/06H01B13/00H01L39/14
CPCH01L39/2451H01L39/2425H01L39/2461C30B23/02H01L39/143H01L39/248C30B23/002C30B29/16Y10T428/12028H10N60/203H10N60/0324H10N60/0548H10N60/0632H10N60/0801
Inventor 张威马丁·W·鲁皮科祖雷斯·安纳瓦拉普莱斯利·G·弗里策迈尔爱德华·J·西格尔瓦莱里·普吕尼耶李齐
Owner AMERICAN SUPERCONDUCTOR
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