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http://dx.doi.org/10.6109/jkiice.2011.15.8.1771

Superconductor Preparation by use of YBa2Cu3Ox powder and BaPbO3 Additive  

Chu, Soon-Nam (경원대학교 공과대학 전기공학과)
Park, Jung-Cheul (경원대학교 IT대학 전자공학과)
Abstract
In this paper, as an attempt to improve the preparation conditions of $YBa_2Cu_3Ox$ superconducting bulk samples, the properties of $YBa_2Cu_3Ox$ superconductor depending on the particle size of YBCO powder and $BaPbO_3$ as an additive have been investigated, and a study on the effects of additive to the density, grain alignment, and porosity of samples that affect the critical current of superconductor has been performed. In order to prepare superconductor, $YBa_2Cu_3Ox$ powder synthesized by sol-gel method, showing a size distribution of 0.2~1 ${\mu}m$ was used. The $BaPbO_3$ added to promote grain growth and to decrease porosities and weak links between grain boundaries of $YBa_2Cu_3Ox$ superconductors. In the samples prepared by sol-gel synthesized powder with 10, 20, and 30 wt% conductive $BaPbO_3$ additives, the sample with 20 wt% $BaPbO_3$ obtained the highest critical current of 4.74 A, showing 20 wt% higher critical current than that with solid state synthesized powder.
Keywords
$YBa_2Cu_3Ox$; superconductor; critical current; sol-gel; $BaPbO_3$;
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