D. Johnson—contributing editor
Burned Rice Husk: An Effective Additive for Enhancing the Electromagnetic Properties of MgB2 Superconductor
Article first published online: 23 NOV 2009
© 2009 The American Ceramic Society
Journal of the American Ceramic Society
Volume 93, Issue 3, pages 732–736, March 2010
How to Cite
Varghese, N., Vinod, K., Shipra, Sundaresan, A. and Syamaprasad, U. (2010), Burned Rice Husk: An Effective Additive for Enhancing the Electromagnetic Properties of MgB2 Superconductor. Journal of the American Ceramic Society, 93: 732–736. doi: 10.1111/j.1551-2916.2009.03438.x
- Issue published online: 26 FEB 2010
- Article first published online: 23 NOV 2009
- Manuscript No. 26454. Received July 15, 2009; approved September 10, 2009.
We investigated the effect of doping of burned rice husk which contains ultrafine SiO2 and highly reactive carbon, on the crystal lattice and superconducting properties of MgB2 superconductor prepared by an in situ powder in sealed tube method. XRD, TEM, and magnetic measurements confirm the substitution of carbon atoms at boron sites in the MgB2 lattice and the formation of intragrain nanoinclusions in MgB2. From JC (H) characteristics, doped samples show a drastic enhancement of JC compared with pure MgB2. The enhancement of in-field JC values is due to the flux pinning on lattice defects produced by C substitution and nanoscale inclusions of impurity phases.