J. Kurian, K.V.O. Nair, P.K. Sajith, Asha M. John, J. Koshy
{"title":"BSCCO超导体新型钙钛矿陶瓷衬底:Ba2GdNbO6上的Bi(2223)厚膜(TC(0)=109K","authors":"J. Kurian, K.V.O. Nair, P.K. Sajith, Asha M. John, J. Koshy","doi":"10.1016/S0964-1807(98)00068-4","DOIUrl":null,"url":null,"abstract":"<div><p>Ba<sub>2</sub>GdNbO<sub>6</sub><span> has been developed as a new substrate suitable for the BSCCO superconductor. Ba</span><sub>2</sub>GdNbO<sub>6</sub><span> has a complex cubic perovskite (A</span><sub>2</sub>BB′O<sub>6</sub><span>) structure with a lattice constant </span><em>a</em>=8.587 Å. The DTA studies revealed that there is no phase transition occurring in Ba<sub>2</sub>GdNbO<sub>6</sub><span> in the temperature range of 30–1300°C. The thermal expansion coefficient of Ba</span><sub>2</sub>GdNbO<sub>6</sub> is found to be 7.913×10<sup>−6</sup>°C<sup>−1</sup>. The dielectric constant and loss factor of Ba<sub>2</sub>GdNbO<sub>6</sub> are in a range suitable for its use as a substrate for microwave applications. The Bi(2223) superconductor does not show any detectable chemical reaction with Ba<sub>2</sub>GdNbO<sub>6</sub><span> even under extreme processing conditions. The thick films<span> of Bi(2223) dip-coated on polycrystalline Ba</span></span><sub>2</sub>GdNbO<sub>6</sub> substrate gave a <em>T</em><sub>C</sub>(0) of 109<!--> <!-->K and a current density of approximately 4×10<sup>3</sup> A/cm<sup>2</sup> at 77<!--> <!-->K and zero magnetic field.</p></div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 6","pages":"Pages 259-265"},"PeriodicalIF":0.0000,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00068-4","citationCount":"18","resultStr":"{\"title\":\"Bi(2223) thick films (TC(0)=109K) on Ba2GdNbO6: a new perovskite ceramic substrate for BSCCO superconductor\",\"authors\":\"J. Kurian, K.V.O. Nair, P.K. Sajith, Asha M. John, J. Koshy\",\"doi\":\"10.1016/S0964-1807(98)00068-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Ba<sub>2</sub>GdNbO<sub>6</sub><span> has been developed as a new substrate suitable for the BSCCO superconductor. Ba</span><sub>2</sub>GdNbO<sub>6</sub><span> has a complex cubic perovskite (A</span><sub>2</sub>BB′O<sub>6</sub><span>) structure with a lattice constant </span><em>a</em>=8.587 Å. The DTA studies revealed that there is no phase transition occurring in Ba<sub>2</sub>GdNbO<sub>6</sub><span> in the temperature range of 30–1300°C. The thermal expansion coefficient of Ba</span><sub>2</sub>GdNbO<sub>6</sub> is found to be 7.913×10<sup>−6</sup>°C<sup>−1</sup>. The dielectric constant and loss factor of Ba<sub>2</sub>GdNbO<sub>6</sub> are in a range suitable for its use as a substrate for microwave applications. The Bi(2223) superconductor does not show any detectable chemical reaction with Ba<sub>2</sub>GdNbO<sub>6</sub><span> even under extreme processing conditions. The thick films<span> of Bi(2223) dip-coated on polycrystalline Ba</span></span><sub>2</sub>GdNbO<sub>6</sub> substrate gave a <em>T</em><sub>C</sub>(0) of 109<!--> <!-->K and a current density of approximately 4×10<sup>3</sup> A/cm<sup>2</sup> at 77<!--> <!-->K and zero magnetic field.</p></div>\",\"PeriodicalId\":100110,\"journal\":{\"name\":\"Applied Superconductivity\",\"volume\":\"6 6\",\"pages\":\"Pages 259-265\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0964-1807(98)00068-4\",\"citationCount\":\"18\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Superconductivity\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0964180798000684\",\"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/S0964180798000684","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 18
摘要
Ba2GdNbO6是一种适用于BSCCO超导体的新型衬底材料。Ba2GdNbO6具有复杂的立方钙钛矿(A2BB 'O6)结构，晶格常数a=8.587 Å。DTA研究表明，在30 ~ 1300℃的温度范围内，Ba2GdNbO6没有发生相变。结果表明，Ba2GdNbO6的热膨胀系数为7.913×10−6°C−1。Ba2GdNbO6的介电常数和损耗因子在合适的范围内，适合作为微波应用的衬底。即使在极端的加工条件下，Bi(2223)超导体也不会与Ba2GdNbO6发生任何可检测的化学反应。在多晶Ba2GdNbO6衬底上浸涂Bi(2223)厚膜，在77 K和零磁场条件下，TC(0)为109 K，电流密度约为4×103 a /cm2。
Bi(2223) thick films (TC(0)=109K) on Ba2GdNbO6: a new perovskite ceramic substrate for BSCCO superconductor
Ba2GdNbO6 has been developed as a new substrate suitable for the BSCCO superconductor. Ba2GdNbO6 has a complex cubic perovskite (A2BB′O6) structure with a lattice constant a=8.587 Å. The DTA studies revealed that there is no phase transition occurring in Ba2GdNbO6 in the temperature range of 30–1300°C. The thermal expansion coefficient of Ba2GdNbO6 is found to be 7.913×10−6°C−1. The dielectric constant and loss factor of Ba2GdNbO6 are in a range suitable for its use as a substrate for microwave applications. The Bi(2223) superconductor does not show any detectable chemical reaction with Ba2GdNbO6 even under extreme processing conditions. The thick films of Bi(2223) dip-coated on polycrystalline Ba2GdNbO6 substrate gave a TC(0) of 109 K and a current density of approximately 4×103 A/cm2 at 77 K and zero magnetic field.
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