Preparation, thermal processing behavior, and characterization of YBCO from freeze-dried nitrate precursors
Creators
- 1. Exploratory Research and Development Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- 2. Center for Materials Science, Temple University, Philadelphia, Pennsylvania 19122 (United States)
- 3. Center for Materials Research and Technology, Florida State University, Tallahassee, Florida 32306-3016 (United States)
- 4. Department of Materials Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
Description
YBCO was synthesized using atomically mixed nitrate precursors. Atomic mixing was achieved using a freeze-dried process which is fully discussed here. The thermal processing behavior of these precursors is fundamentally different from that of mechanical mixtures of the Y, Ba, and Cu oxides and it is examined in detail. Ba2Cu3O5+x (normally considered a high oxygen pressure phase) and Y2O3 formed as nitrate decomposition products at ambient atmospheric conditions. Subsequent reaction of these materials (2 h at 925 degree C) produced polycrystalline YBCO. Without any post-processing of the powders, product YBCO powders consisted of 30 μm agglomerates composed of crystals 1--3 μm on an edge. The powdered products exhibited a magnetic susceptibility greater than 90%-1/4π
Additional details
Publishing Information
- Journal Title
- Journal of Materials Research
- Journal Volume
- 7
- Journal Issue
- 8
- Journal Page Range
- p. 2017-2026.
- ISSN
- 0884-2914
- CODEN
- JMREEE
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24014227
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; FREEZING; HEAT TREATMENTS; HIGH-TC SUPERCONDUCTORS; MAGNETIC SUSCEPTIBILITY; POLYCRYSTALS; POWDERS; SYNTHESIS; TEMPERATURE RANGE 1000-4000 K; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; MAGNETIC PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS