Cargando…
Primary Phase Field of the Pb-Doped 2223 High-T(c) Superconductor in the (Bi, Pb)-Sr-Ca-Cu-O System
Both liquidus and subsolidus phase equilibrium data are of central importance for applications of high temperature superconductors in the (Bi, Pb)-Sr-Ca-Cu-O system, including material synthesis, melt processing and single crystal growth. The subsolidus equilibria of the 110 K high-T(c) Pb-doped 222...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
[Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology
1999
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4878872/ http://dx.doi.org/10.6028/jres.104.020 |
_version_ | 1782433622568992768 |
---|---|
author | Wong-Ng, W. Cook, L. P. Kearsley, A. Greenwood, W. |
author_facet | Wong-Ng, W. Cook, L. P. Kearsley, A. Greenwood, W. |
author_sort | Wong-Ng, W. |
collection | PubMed |
description | Both liquidus and subsolidus phase equilibrium data are of central importance for applications of high temperature superconductors in the (Bi, Pb)-Sr-Ca-Cu-O system, including material synthesis, melt processing and single crystal growth. The subsolidus equilibria of the 110 K high-T(c) Pb-doped 2223 ([Bi, Pb], Sr, Ca, Cu) phase and the location of the primary phase field (crystallization field) have been determined in this study. For the quantitative determination of liquidus data, a wicking technique was developed to capture the melt for quantitative microchemical analysis. A total of 29 five-phase volumes that include the 2223 phase as a component was obtained. The initial melt compositions of these volumes range from a mole fraction of 7.3 % to 28.0 % for Bi, 11.3 % to 27.8 % for Sr, 1.2 % to 19.4 % for Pb, 9.8 % to 30.8 % for Ca, and 17.1 % to 47.0 % for Cu. Based on these data, the crystallization field for the 2223 phase was constructed using the convex hull technique. A section of this “volume” was obtained by holding two components of the composition at the median value, allowing projection on the other three axes to show the extent of the field. |
format | Online Article Text |
id | pubmed-4878872 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1999 |
publisher | [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology |
record_format | MEDLINE/PubMed |
spelling | pubmed-48788722016-09-06 Primary Phase Field of the Pb-Doped 2223 High-T(c) Superconductor in the (Bi, Pb)-Sr-Ca-Cu-O System Wong-Ng, W. Cook, L. P. Kearsley, A. Greenwood, W. J Res Natl Inst Stand Technol Article Both liquidus and subsolidus phase equilibrium data are of central importance for applications of high temperature superconductors in the (Bi, Pb)-Sr-Ca-Cu-O system, including material synthesis, melt processing and single crystal growth. The subsolidus equilibria of the 110 K high-T(c) Pb-doped 2223 ([Bi, Pb], Sr, Ca, Cu) phase and the location of the primary phase field (crystallization field) have been determined in this study. For the quantitative determination of liquidus data, a wicking technique was developed to capture the melt for quantitative microchemical analysis. A total of 29 five-phase volumes that include the 2223 phase as a component was obtained. The initial melt compositions of these volumes range from a mole fraction of 7.3 % to 28.0 % for Bi, 11.3 % to 27.8 % for Sr, 1.2 % to 19.4 % for Pb, 9.8 % to 30.8 % for Ca, and 17.1 % to 47.0 % for Cu. Based on these data, the crystallization field for the 2223 phase was constructed using the convex hull technique. A section of this “volume” was obtained by holding two components of the composition at the median value, allowing projection on the other three axes to show the extent of the field. [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 1999 1999-06-01 /pmc/articles/PMC4878872/ http://dx.doi.org/10.6028/jres.104.020 Text en https://creativecommons.org/publicdomain/zero/1.0/ The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright. |
spellingShingle | Article Wong-Ng, W. Cook, L. P. Kearsley, A. Greenwood, W. Primary Phase Field of the Pb-Doped 2223 High-T(c) Superconductor in the (Bi, Pb)-Sr-Ca-Cu-O System |
title | Primary Phase Field of the Pb-Doped 2223 High-T(c) Superconductor in the (Bi, Pb)-Sr-Ca-Cu-O System |
title_full | Primary Phase Field of the Pb-Doped 2223 High-T(c) Superconductor in the (Bi, Pb)-Sr-Ca-Cu-O System |
title_fullStr | Primary Phase Field of the Pb-Doped 2223 High-T(c) Superconductor in the (Bi, Pb)-Sr-Ca-Cu-O System |
title_full_unstemmed | Primary Phase Field of the Pb-Doped 2223 High-T(c) Superconductor in the (Bi, Pb)-Sr-Ca-Cu-O System |
title_short | Primary Phase Field of the Pb-Doped 2223 High-T(c) Superconductor in the (Bi, Pb)-Sr-Ca-Cu-O System |
title_sort | primary phase field of the pb-doped 2223 high-t(c) superconductor in the (bi, pb)-sr-ca-cu-o system |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4878872/ http://dx.doi.org/10.6028/jres.104.020 |
work_keys_str_mv | AT wongngw primaryphasefieldofthepbdoped2223hightcsuperconductorinthebipbsrcacuosystem AT cooklp primaryphasefieldofthepbdoped2223hightcsuperconductorinthebipbsrcacuosystem AT kearsleya primaryphasefieldofthepbdoped2223hightcsuperconductorinthebipbsrcacuosystem AT greenwoodw primaryphasefieldofthepbdoped2223hightcsuperconductorinthebipbsrcacuosystem |