Formation of BaCeO3 and its influence on microstructure of sintered/melt-textured Y--Ba--Cu--O oxides with CeO2 addition
- 1. Superconductivity Research Department, Korea Atomic Energy Research Institute, P.O. Box 7, Daedukdanji, Daejon, 305-606 (Korea, Republic of)
- 2. Department of Materials Science and Engineering, Choongnam National University, Daeduk Science Town, Daejon, 301-764 (Korea, Republic of)
- 3. Center for Materials Science and Engineering, Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
Description
Formation of BaCeO3 and its effects on microstructure were studied in sintered/melt-textured Y--Ba--Cu--O oxides containing 5 wt.% CeO2 and various amounts of Y2Ba1Cu1O5. The added CeO2 was converted to fine particles of BaCeO3 near 930 degree C which is the conventional sintering temperature for Y--Ba--Cu--O. Y2Ba1Cu1O5 and CuO are formed as by-products of the reaction between CeO2 and Y1Ba2Cu3O7-y phase. The CeO2 addition reduced the particle size of Y2B1Cu1O5 which was trapped in the Y1Ba2Cu3O7-y matrix after the melt-texture growth. During the peritectic decomposition stage of Y1Ba2Cu3O7-y phase into Y2B1Cu1O5 and liquid phase, the morphology of the decomposed Y2Ba1Cu1O5 was changed from a blocky shape in the undoped sample to an acicular shape of high anisotropy in the CeO2-added sample. The formation of the highly anisotropic Y2Ba1Cu1O5 particles appears to be responsible for the refinement of Y2Ba1Cu1O5 particle after the melt-texture processing
Additional details
Publishing Information
- Journal Title
- Journal of Materials Research
- Journal Volume
- 9
- Journal Issue
- 8
- Journal Page Range
- p. 1952-1960.
- ISSN
- 0884-2914
- CODEN
- JMREEE
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 25072042
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ADDITIVES; BARIUM OXIDES; CERIUM OXIDES; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; MICROSTRUCTURE; SINTERING; TEMPERATURE RANGE 1000-4000 K; TEXTURE; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CERIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL STRUCTURE; FABRICATION; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS