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Title: Zone refining of sintered, microwave-derived YBCO superconductors

Abstract

Post-sintering treatments such as zone melting under thermal gradient has been conducted on sintered YBCO tape cast films. YBCO precursor powder was derived through decomposition of a mixture of nitrates of cations in a microwave oven for {approx}4 min. The resulting powder was characterized and made into thin sheets by tape casting and then sintered at 945 C for 5 h. The sintered tapes were subjected to repeated zone refining operations at relatively high speeds of {approx}30 mm/h. A microstructure having uniformly oriented grains in the a-b plane throughout the bulk of the sample was obtained by three repeated zone refining operations. Details of precursor preparation, microwave processing and its advantages, zone refining conditions, and microstructural features are presented in this paper.

Authors:
; ; ;  [1];  [2]
  1. CSIR, Trivandrum (India). Regional Research Lab.
  2. Argonne National Lab., IL (United States). Energy Technology Div.
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10107413
Report Number(s):
ANL/ET/PP-80280
ON: DE95004657;; TRN: AHC29505%%137
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jul 1993
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; YTTRIUM OXIDES; ZONE REFINING; MICROSTRUCTURE; BARIUM OXIDES; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; FABRICATION; EXPERIMENTAL DATA; 360201; 360202; PREPARATION AND FABRICATION; STRUCTURE AND PHASE STUDIES

Citation Formats

Warrier, K G.K., Varma, H K, Mani, T V, Damodaran, A D, and Balachandran, U. Zone refining of sintered, microwave-derived YBCO superconductors. United States: N. p., 1993. Web. doi:10.2172/10107413.
Warrier, K G.K., Varma, H K, Mani, T V, Damodaran, A D, & Balachandran, U. Zone refining of sintered, microwave-derived YBCO superconductors. United States. https://doi.org/10.2172/10107413
Warrier, K G.K., Varma, H K, Mani, T V, Damodaran, A D, and Balachandran, U. 1993. "Zone refining of sintered, microwave-derived YBCO superconductors". United States. https://doi.org/10.2172/10107413. https://www.osti.gov/servlets/purl/10107413.
@article{osti_10107413,
title = {Zone refining of sintered, microwave-derived YBCO superconductors},
author = {Warrier, K G.K. and Varma, H K and Mani, T V and Damodaran, A D and Balachandran, U},
abstractNote = {Post-sintering treatments such as zone melting under thermal gradient has been conducted on sintered YBCO tape cast films. YBCO precursor powder was derived through decomposition of a mixture of nitrates of cations in a microwave oven for {approx}4 min. The resulting powder was characterized and made into thin sheets by tape casting and then sintered at 945 C for 5 h. The sintered tapes were subjected to repeated zone refining operations at relatively high speeds of {approx}30 mm/h. A microstructure having uniformly oriented grains in the a-b plane throughout the bulk of the sample was obtained by three repeated zone refining operations. Details of precursor preparation, microwave processing and its advantages, zone refining conditions, and microstructural features are presented in this paper.},
doi = {10.2172/10107413},
url = {https://www.osti.gov/biblio/10107413}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jul 01 00:00:00 EDT 1993},
month = {Thu Jul 01 00:00:00 EDT 1993}
}