Wet chemical passivation of YBa sub 2 Cu sub 3 O sub 7 minus x

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Journal of the Electrochemical Society; (USA)

DOI:https://doi.org/10.1149/1.2086940· OSTI ID:6484243

Vasquez, R P; Hunt, B D; Foote, M C ^[1]

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1. Center for Space Microelectonics Technology, Jet Propulsion Lab., California Inst. of Technology, Pasadena, CA (US)

Wet chemical techniques are described for treatment of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} surfaces, which result in the formation of native compounds known to have little or no reactivity to water. Suitable native compounds include CuI, BaSO{sub 4}, CuS, Cu{sub 2}S, YF{sub 3}, and the oxalates. Formation of surface layers in which these nonreactive native compounds are major constituents is verified with x-ray photoelectron spectroscopy (XPS) measurements on YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} films treated with dilute solutions of HI, H{sub 2}SO{sub 4}, Na{sub 2}S, HF, or H{sub 2}C{sub 2}O{sub 4}. No significant changes are observed in the XPS spectra when the sulfide, sulfate, or oxalate films are dipped in water, while the iodide and fluoride films show evidence of reaction with water. X-ray diffraction measurements show that the superconducting phase is absent in the sulfide film, but is unaffected by the oxalate and sulfate treatments.

• OSTI ID: 6484243
• Journal Information: Journal of the Electrochemical Society; (USA), Journal Name: Journal of the Electrochemical Society; (USA) Vol. 137:7; ISSN 0013-4651; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BARIUM SULFATES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER HALIDES
COPPER IODIDES
COPPER OXIDES
COPPER SULFIDES
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPECTROSCOPY
FILMS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IODIDES
IODINE COMPOUNDS
KINETICS
OXIDES
OXYGEN COMPOUNDS
PASSIVATION
PHASE STUDIES
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
REACTION KINETICS
SCATTERING
SPECTRA
SPECTROSCOPY
SULFATES
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTIVITY
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
X-RAY SPECTRA
YTTRIUM COMPOUNDS
YTTRIUM FLUORIDES
YTTRIUM OXIDES