New preparative methods to enhance phase purity and physical properties of cuprate superconductors

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5997468

Salomon, R E; Schaeffer, R; Macho, J; Thomas, A; Myer, G H ^[1]; Coppa, N V ^[2]

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1. Temple Univ., Philadelphia, PA (United States) Ben Franklin Superconductivity Center, Philadelphia, PA (United States)
2. Los Alamos National Lab., NM (United States)

Several methods which avoid the problems inherent in solid state reactions have been developed. These methods include freeze drying, liquid ammonia based processes and a novel xerogel process. They are applicable to both 123, 124 and BISCCO based superconductors and have as their goal the atomic mixing of precursors in order to reduce inhomogeneity in the final product. The three methods are described and compared to each other and to conventional methods of synthesis. The products prepared by these methods are fully characterized by elemental analysis, XRD, TGA, DSC, resistivity and magnetic susceptibility versus temperature and by SEM. 13 refs., 2 figs.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5997468
• Report Number(s): LA-UR-91-3229; CONF-9109102-2; ON: DE92002468
• Resource Relation: Conference: 5. annual conference on superconductivity and applications, Buffalo, NY (United States), 24-26 Sep 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
CHEMICAL PREPARATION
AMMONIA
BARIUM OXIDES
COPPER OXIDES
ELECTRIC CONDUCTIVITY
IMPURITIES
LYOPHILIZATION
MAGNETIZATION
MIXING
PHYSICAL PROPERTIES
X-RAY DIFFRACTION
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
DIFFRACTION
ELECTRICAL PROPERTIES
HYDRIDES
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SUPERCONDUCTORS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)