Determination of oxygen content and carbonate impurity in YBa sub 2 Cu sub 3 O sub 7 minus x by diffuse reflectance infrared spectroscopy
Journal Article
·
· Journal of Applied Physics; (USA)
- Earth Sciences Department, Lawrence Livermore National Laboratory, Livermore, California 94550 (US)
Samples of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} with {ital x} ranging from {similar to}0 to 0.65 have been analyzed by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) in the midinfrared region (400--6000 cm{sup {minus}1}). Spectral line shapes vary gradually as a function of oxygen stoichiometry, and the reflectance at 400 and 1000 cm{sup {minus}1} decreases linearly with decreasing oxygen content. Spectra of samples that were incompletely synthesized or exposed to a 4% CO{sub 2} atmosphere at 650 {degree}C clearly indicated the presence of carbonate. DRIFTS is therefore a quick, nondestructive method for determining oxygen content in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} powders, and for detecting carbonate species due to synthesis error or reaction with CO{sub 2}-bearing atmosphere.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5635940
- Journal Information:
- Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360200 -- Ceramics
Cermets
& Refractories
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ALKALINE EARTH METAL COMPOUNDS
ATMOSPHERES
BARIUM COMPOUNDS
BARIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DETECTION
ELEMENTS
IMPURITIES
INFRARED SPECTRA
NONMETALS
OPTICAL PROPERTIES
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECTRA
SPECTRAL REFLECTANCE
STOICHIOMETRY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360200 -- Ceramics
Cermets
& Refractories
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ALKALINE EARTH METAL COMPOUNDS
ATMOSPHERES
BARIUM COMPOUNDS
BARIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DETECTION
ELEMENTS
IMPURITIES
INFRARED SPECTRA
NONMETALS
OPTICAL PROPERTIES
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECTRA
SPECTRAL REFLECTANCE
STOICHIOMETRY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES