Densification and Critical Current Density of YBa2Cu3Ox Ceramics
The improvement of Jc was explored from the aspect of densification of sintered bodies in YBa2 Cu3 Ox. Two methods were employed to increase the bulk density of sintered bodies; (a) Calcined powder was ball-milled to obtain fine particles and increase the sinterabi1ity. (b) Specimens were formed by swaging to get powder compacts of high density.
Sintered bodies of over 6.0 g/cm3 were easily obtained but they did not necessarily show a high Jc value. Several problems such as the reaction of powder with water during ball milling, the formation of microcracks on sintering and low oxygen contents of specimens were identified. Reducing these problems improved the Jc value up to 600 – 800 A/cm2.
KeywordsBulk Density Sinter Temperature Critical Current Density Current Path Sintered Body
Unable to display preview. Download preview PDF.
- 7.J. W. Ekin, Adv. Ceram. Mater. 2 [3B] (1987), 586.Google Scholar
- 8.D. W. Johnson, Jr., E. M. Gyorgy, W. W. Rhodes, R. J. Cava, L. C. Feldman and R. B. van Dover, Adv. Ceram. Mater. 2 [3B] (1987), 364.Google Scholar
- 14.Y. Saito, unpublished data.Google Scholar
- 15.T. Kandori, unpublished data.Google Scholar