書誌事項
- タイトル別名
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- Synthesis of High-purity YBa2Cu3O7-d Superconductors by Polymerized Complex Method.
- サクタイ ジュウゴウホウ ニ ヨル コウ ジュンド Y Ba 2 Cu 3 O
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High-purity ceramic samples of the superconducting YBa2Cu3O7-d (123) phase have been prepared by the polymerized complex method starting either from metal carbonates dissolved into ethyleneglycol (EG) with large excess of citric acid (CA) or from metal nitrates dissolved into a mixed solvent of water and EG with an approximately equivalent amount of CA. The method is based on the formation of a polymeric gel which is obtained through polyesterification between metal citrate complexes and EG. It has turned out that the large excess of citric acid facilitates direct gelation without passing through formation of colloid or sol, whereas coagulation of a colloid (sol) has occurred when the amount of citric acid is insufficient. X-ray diffraction, Raman scattering and complex magnetic susceptibility measurements have shown better aspects with regard to purity and superconducting properties in samples prepared via the direct gelation than those prepared via the colloid (sol) coagulation. The onset temperature of superconducting transition for the best 123 sample was 91.5 K and the transition width (10-90%) of full diamagnetism was 0.5 K for a measuring field of 10 mOe.
収録刊行物
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- 粉体および粉末冶金
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粉体および粉末冶金 40 (10), 982-986, 1993
一般社団法人 粉体粉末冶金協会
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詳細情報 詳細情報について
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- CRID
- 1390001206309522176
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- NII論文ID
- 130000819108
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- NII書誌ID
- AN00222724
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- COI
- 1:CAS:528:DyaK2cXitlemsr8%3D
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- ISSN
- 18809014
- 05328799
- http://id.crossref.org/issn/05328799
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- NDL書誌ID
- 3852183
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可