Preparation of Ba/sub 2/YCu/sub 3/O/sub 7-chi/ by spray decomposition method

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Modern Physics Letters B; (USA)

DOI:https://doi.org/10.1142/S0217984988000072· OSTI ID:5733694

Shimazu, S; Uematsu, T ^[1]; Kuwasawa, Y; matsuda, S ^[2]

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1. Dept. of Synthetic Chemistry, Chiba Univ., Chiba 260 (JP)
2. Chiba Univ. (Japan). Dept. of Physics

Ba/sub 2/YCu/sub 3/O/sub 7-chi/(BYCO) was prepared by Spray Decomposition (SPD) method varying conditions and characterized by X-ray diffraction (XRD), scanning electron micrograph (SEM), and electric conductivity measurements. SPD method gave a remarkable larger grain size of BYCO compared with the conventional grinding method. The major phase of the initial product from SPD was tetragonal and did not show superconductivity. After annealed at 1223 {Kappa}, the major phase became orthorhombic with a = 3.89A, b = 3.83A, and c = 11.66A. T/sub c/(m) and {Delta}T/sub c/(10-90{sup 0}) were 93.4 {kappa} and 1.4 {Kappa}, respectively.

• OSTI ID: 5733694
• Journal Information: Modern Physics Letters B; (USA), Journal Name: Modern Physics Letters B; (USA) Vol. 2:1; ISSN MPLBE; ISSN 0217-9849
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
FABRICATION
HEAT TREATMENTS
MICROSCOPY
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
SCANNING ELECTRON MICROSCOPY
SCATTERING
SUPERCONDUCTIVITY
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES