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Title: Preparation of highly textured oxide superconducting films from MOD precursor solutions

Abstract

A method is described for fabricating a textured superconducting oxide film comprising: preparing a metal-organic precursor solution containing cation constituents of the film in a stoichiometry nearly equal to the stoichiometry of the oxide film; selecting a substrate that is chemically non-inert with respect to the desired superconducting oxide; applying a coating of the precursor solution to said substrate; exposing the coating to a heat treatment comprising: a first heating at a first temperature in a first controlled atmosphere selected to decompose the precursor coating while avoiding the volatilization of a metal containing precursor constituent; a second heating at a second temperature in a second controlled atmosphere selected to create local compositional inhomogeneities in the coating; a third heating at a third temperature in a third controlled atmosphere selected to minimize the amount of transient liquid present and to form a compositionally homogeneous film; and a final heat treatment at a temperature in the range of 400 C to 500 C and in an oxygen atmosphere selected to insure that the film is fully oxygenated, thereby producing a textured superconducting oxide phase.

Inventors:
;
Publication Date:
OSTI Identifier:
6326594
Patent Number(s):
US 5231074; A
Application Number:
PPN: US 7-510115
Assignee:
Massachusetts Inst. of Tech., Cambridge, MA (United States)
Resource Type:
Patent
Resource Relation:
Patent File Date: 17 Apr 1990
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; FABRICATION; SUPERCONDUCTING FILMS; CERAMICS; COATINGS; EVAPORATION; HEAT TREATMENTS; OXIDES; PRECURSOR; STOICHIOMETRY; SUBSTRATES; CHALCOGENIDES; FILMS; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; SUPERCONDUCTORS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats

Cima, M J, and McIntyre, P. Preparation of highly textured oxide superconducting films from MOD precursor solutions. United States: N. p., 1993. Web.
Cima, M J, & McIntyre, P. Preparation of highly textured oxide superconducting films from MOD precursor solutions. United States.
Cima, M J, and McIntyre, P. Tue . "Preparation of highly textured oxide superconducting films from MOD precursor solutions". United States.
@article{osti_6326594,
title = {Preparation of highly textured oxide superconducting films from MOD precursor solutions},
author = {Cima, M J and McIntyre, P},
abstractNote = {A method is described for fabricating a textured superconducting oxide film comprising: preparing a metal-organic precursor solution containing cation constituents of the film in a stoichiometry nearly equal to the stoichiometry of the oxide film; selecting a substrate that is chemically non-inert with respect to the desired superconducting oxide; applying a coating of the precursor solution to said substrate; exposing the coating to a heat treatment comprising: a first heating at a first temperature in a first controlled atmosphere selected to decompose the precursor coating while avoiding the volatilization of a metal containing precursor constituent; a second heating at a second temperature in a second controlled atmosphere selected to create local compositional inhomogeneities in the coating; a third heating at a third temperature in a third controlled atmosphere selected to minimize the amount of transient liquid present and to form a compositionally homogeneous film; and a final heat treatment at a temperature in the range of 400 C to 500 C and in an oxygen atmosphere selected to insure that the film is fully oxygenated, thereby producing a textured superconducting oxide phase.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {7}
}