Understanding the porosity and its effects on the superconducting properties of YBCO single grains. Issue 4 (April 2023)

• Record Type: Journal Article
• Authors: Baumann, Josef; Shi, Yunhua; Weerakonda, Dian; Durrell, John H.; Cardwell, David A.
• Is Part Of: Journal of the European Ceramic Society. Volume 43:Issue 4(2023)
• Page Start: 1542
• Page End: 1547
• Publication Date: 2023-04
• Subjects: YBCO -- Bulk superconductor -- Porosity -- Trapped field -- Critical current density; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2022.11.039
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: The influence of porosity on the trapped field achievable in 22 YBCO bulk superconductors of different sizes has been investigated and evaluated using Spearman's correlation coefficient in order to explore the significance of these critical features in a statistically significant way. The diameter of the single grain YBCO bulk sample correlates strongly with trapped field, and significantly more so than the effect of porosity. Therefore, the direct effect of porosity on the average J c was investigated as the main aim of this investigation. A correlation was found between the average J c calculated from trapped field measured at the top and bottom of the single grain and the porosity of the sample. This observation suggests that any method of reducing the porosity may significantly improve J c and trapped field.