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Composites of MgB<sub>2</sub>with Bi<sub>2</sub>O<sub>3</sub>, Bi, Sb<sub>2</sub>O<sub>3</sub>, or Sb Obtained by Ex-situ Spark Plasma Sintering
Bibliographic Information
- Published
- 2012-11-01
- Resource Type
- journal article
- Rights Information
-
- https://iopscience.iop.org/page/copyright
- https://iopscience.iop.org/info/page/text-and-data-mining
- DOI
-
- 10.1143/jjap.51.11pg13
- 10.7567/jjap.51.11pg13
- Publisher
- IOP Publishing
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Description
<jats:p>Mixtures of MgB<jats:sub>2</jats:sub>and metal or oxide additions with starting compositions of (MgB<jats:sub>2</jats:sub>)(M<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>)<jats:sub><jats:italic>x</jats:italic></jats:sub>,<jats:italic>x</jats:italic>= 0.0025, 0.005, 0.015, and (MgB<jats:sub>2</jats:sub>)(M)<jats:sub><jats:italic>y</jats:italic></jats:sub>,<jats:italic>y</jats:italic>= 0.01, M = Bi, Sb, were processed by spark plasma sintering (SPS). As-obtained samples are composites with high density exceeding 94% of the theoretical values. Secondary phases indicate similar reactions for samples with Bi- or Sb-based additions. However, samples show very different superconducting characteristics depending on the addition type and amount. A direct correlation with the melting temperature of the addition could not be revealed, although some aspects will be discussed. From the critical current density (<jats:italic>J</jats:italic><jats:sub>c</jats:sub>) and irreversibility field (<jats:italic>H</jats:italic><jats:sub>irr</jats:sub>) enhancement viewpoints, optimum additions are oxides for<jats:italic>x</jats:italic>=0.0025, 0.005. Both oxides improve<jats:italic>J</jats:italic><jats:sub>c</jats:sub>at high fields, but Sb<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>is effective up to 10 K, whereas Bi<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>is effective up to 30 K. Metal additions decrease<jats:italic>J</jats:italic><jats:sub>c</jats:sub>and<jats:italic>H</jats:italic><jats:sub>irr</jats:sub>when compared with a pristine MgB<jats:sub>2</jats:sub>sample.</jats:p>
Journal
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 51 (11S), 11PG13-, 2012-11-01
IOP Publishing
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Details 詳細情報について
-
- CRID
- 1360003446857340672
-
- NII Article ID
- 210000141651
- 210000073274
-
- ISSN
- 13474065
- 00214922
- http://id.crossref.org/issn/00214922
- https://id.crossref.org/issn/13474065
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- Article Type
- journal article
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- Data Source
-
- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE
