{"title":"不同高度GdBa2Cu3Oy块体超导体的微观结构和宏观超导性能","authors":"Daniela Volochová, Monika Radušovská, Pavel Diko","doi":"10.1111/jace.20435","DOIUrl":null,"url":null,"abstract":"<p>Bulk single-grain GdBCO superconductors with a nominal composition of 1 mol GdBa₂Cu₃O₇<sub>-δ</sub> + 1/2 mol Gd₂BaCuO₅ + 20 wt% Ag₂O + 0.5 wt% CeO₂, and with varying heights, were grown using a top-seeded melt growth process. The diameter of the prepared GdBCO samples was 17.5 mm, with heights ranging from 5 to 11 mm. Additionally, the tallest GdBCO sample was cut incrementally to match the heights of the grown samples. The macroscopic superconducting properties of the samples were measured at 77.3 K on both the top and bottom surfaces. It was observed that the decrease in the maximum trapped magnetic field, as well as the decrease in levitation force with decreasing sample height, differed between the top and bottom surfaces. The influence of macrostructural and microstructural features, such as the distribution of residual melt, and the volume fraction and size of Gd211 particles in growth sectors, on the trends of this decrease is analyzed.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 6","pages":""},"PeriodicalIF":3.5000,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Microstructure and macroscopic superconducting properties of GdBa2Cu3Oy bulk superconductors with different heights\",\"authors\":\"Daniela Volochová, Monika Radušovská, Pavel Diko\",\"doi\":\"10.1111/jace.20435\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Bulk single-grain GdBCO superconductors with a nominal composition of 1 mol GdBa₂Cu₃O₇<sub>-δ</sub> + 1/2 mol Gd₂BaCuO₅ + 20 wt% Ag₂O + 0.5 wt% CeO₂, and with varying heights, were grown using a top-seeded melt growth process. The diameter of the prepared GdBCO samples was 17.5 mm, with heights ranging from 5 to 11 mm. Additionally, the tallest GdBCO sample was cut incrementally to match the heights of the grown samples. The macroscopic superconducting properties of the samples were measured at 77.3 K on both the top and bottom surfaces. It was observed that the decrease in the maximum trapped magnetic field, as well as the decrease in levitation force with decreasing sample height, differed between the top and bottom surfaces. The influence of macrostructural and microstructural features, such as the distribution of residual melt, and the volume fraction and size of Gd211 particles in growth sectors, on the trends of this decrease is analyzed.</p>\",\"PeriodicalId\":200,\"journal\":{\"name\":\"Journal of the American Ceramic Society\",\"volume\":\"108 6\",\"pages\":\"\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2025-02-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the American Ceramic Society\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/jace.20435\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the American Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jace.20435","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Microstructure and macroscopic superconducting properties of GdBa2Cu3Oy bulk superconductors with different heights
Bulk single-grain GdBCO superconductors with a nominal composition of 1 mol GdBa₂Cu₃O₇-δ + 1/2 mol Gd₂BaCuO₅ + 20 wt% Ag₂O + 0.5 wt% CeO₂, and with varying heights, were grown using a top-seeded melt growth process. The diameter of the prepared GdBCO samples was 17.5 mm, with heights ranging from 5 to 11 mm. Additionally, the tallest GdBCO sample was cut incrementally to match the heights of the grown samples. The macroscopic superconducting properties of the samples were measured at 77.3 K on both the top and bottom surfaces. It was observed that the decrease in the maximum trapped magnetic field, as well as the decrease in levitation force with decreasing sample height, differed between the top and bottom surfaces. The influence of macrostructural and microstructural features, such as the distribution of residual melt, and the volume fraction and size of Gd211 particles in growth sectors, on the trends of this decrease is analyzed.
期刊介绍：
The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials.
Papers on fundamental ceramic and glass science are welcome including those in the following areas:
Enabling materials for grand challenges[...]
Materials design, selection, synthesis and processing methods[...]
Characterization of compositions, structures, defects, and properties along with new methods [...]
Mechanisms, Theory, Modeling, and Simulation[...]
JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.
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