{"title":"溶液纺丝制备Nd123长丝超导体的OCMG工艺","authors":"Tomoko Goto, Masahide Takahama, Takuji Kimura","doi":"10.1016/S0964-1807(98)00096-9","DOIUrl":null,"url":null,"abstract":"<div><p><span>The oxygen controlled melt growth (OCMG) process for filamentary Nd123 superconductors has been studied to enhance the </span><em>J</em><sub>c</sub> values. The filamentary Nd<sub>1.18</sub>Ba<sub>2.12</sub>Cu<sub>3.09</sub>O<sub><em>x</em></sub> (1) and Nd<sub>1.25</sub>Ba<sub>2.05</sub>Cu<sub>3.10</sub>O<sub><em>x</em></sub> (2) precursors were prepared by dry spinning through a homogeneous aqueous solution containing mixed acetates of Nd, Ba and Cu, poly(vinyl alcohol). The calcined filaments were partially melted in flowing 0.1% O<sub>2</sub>+Ar. The <em>T</em><sub>c</sub> values of filament (1) was 94.5<!--> <!-->K and 88.5<!--> <!-->K for filament (2). By controlling the heating condition, maximum <em>J</em><sub>c</sub> values of 2.4×10<sup>4</sup> A/cm<sup>2</sup> and 1.8×10<sup>4</sup> A/cm<sup>2</sup> at 77<!--> <!-->K and 0<!--> <!-->T were attained for filaments (1) and (2), respectively. A window of the optimum heating conditions for filament (2) was narrow and the reproducibility of the high <em>J</em><sub>c</sub> value was poor.</p></div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 2","pages":"Pages 157-162"},"PeriodicalIF":0.0000,"publicationDate":"1998-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00096-9","citationCount":"3","resultStr":"{\"title\":\"OCMG process for filamentary Nd123 superconductor produced by solution spinning\",\"authors\":\"Tomoko Goto, Masahide Takahama, Takuji Kimura\",\"doi\":\"10.1016/S0964-1807(98)00096-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span>The oxygen controlled melt growth (OCMG) process for filamentary Nd123 superconductors has been studied to enhance the </span><em>J</em><sub>c</sub> values. The filamentary Nd<sub>1.18</sub>Ba<sub>2.12</sub>Cu<sub>3.09</sub>O<sub><em>x</em></sub> (1) and Nd<sub>1.25</sub>Ba<sub>2.05</sub>Cu<sub>3.10</sub>O<sub><em>x</em></sub> (2) precursors were prepared by dry spinning through a homogeneous aqueous solution containing mixed acetates of Nd, Ba and Cu, poly(vinyl alcohol). The calcined filaments were partially melted in flowing 0.1% O<sub>2</sub>+Ar. The <em>T</em><sub>c</sub> values of filament (1) was 94.5<!--> <!-->K and 88.5<!--> <!-->K for filament (2). By controlling the heating condition, maximum <em>J</em><sub>c</sub> values of 2.4×10<sup>4</sup> A/cm<sup>2</sup> and 1.8×10<sup>4</sup> A/cm<sup>2</sup> at 77<!--> <!-->K and 0<!--> <!-->T were attained for filaments (1) and (2), respectively. A window of the optimum heating conditions for filament (2) was narrow and the reproducibility of the high <em>J</em><sub>c</sub> value was poor.</p></div>\",\"PeriodicalId\":100110,\"journal\":{\"name\":\"Applied Superconductivity\",\"volume\":\"6 2\",\"pages\":\"Pages 157-162\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00096-9\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Superconductivity\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0964180798000969\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Superconductivity","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0964180798000969","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
OCMG process for filamentary Nd123 superconductor produced by solution spinning
The oxygen controlled melt growth (OCMG) process for filamentary Nd123 superconductors has been studied to enhance the Jc values. The filamentary Nd1.18Ba2.12Cu3.09Ox (1) and Nd1.25Ba2.05Cu3.10Ox (2) precursors were prepared by dry spinning through a homogeneous aqueous solution containing mixed acetates of Nd, Ba and Cu, poly(vinyl alcohol). The calcined filaments were partially melted in flowing 0.1% O2+Ar. The Tc values of filament (1) was 94.5 K and 88.5 K for filament (2). By controlling the heating condition, maximum Jc values of 2.4×104 A/cm2 and 1.8×104 A/cm2 at 77 K and 0 T were attained for filaments (1) and (2), respectively. A window of the optimum heating conditions for filament (2) was narrow and the reproducibility of the high Jc value was poor.
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