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Electrical properties of nanoceramics reinforced with ropes of single-walled carbon nanotubes

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4 Author(s)
Zhan, Guo-Dong ; Department of Chemical Engineering and Materials Science, University of California, Davis, One Shields Avenue, California 95616 ; Kuntz, Joshua D. ; Garay, Javier E. ; Mukherjee, Amiya K.

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Single-walled carbon nanotubes (SWCNTs) were used to convert insulating nanoceramics to metallically conductive composites. Dense SWCNT/Al2O3 nanocomposites with CNT contents ranging from 5.7 to 15 vol % and with nanocrystalline alumina matrices have been fabricated by spark-plasma-sintering that retains the integrity of SWCNT in the matrix. The conductivity of these composites increases with increasing content of CNTs. The conductivity has been increased to 3345 S/m in the 15 vol % SWCNT/Al2O3 nanocomposite at room temperature. This is an increase of 13 orders of magnitude over pure alumina and of more than 735% over previously reported results in CNT–ceramic composites. © 2003 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:83 ,  Issue: 6 )

Date of Publication:

Aug 2003

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