TITLE

Multiwalled carbon nanotube/BaTiO3 nanocomposites: Electrical and rectification properties

AUTHOR(S)
Huang, Qing; Gao, Lian
PUB. DATE
March 2005
SOURCE
Applied Physics Letters;3/21/2005, Vol. 86 Issue 12, p123104
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Multiwalled carbon nanotube (MWNT)/BaTiO3 functional nanocomposites were fabricated via the spark plasma sintering technique. The resistivity of MWNT/BaTiO3 nanocomposites was found higher than that of MWNT-free BaTiO3 ceramics. In addition, the temperature dependence of resistivity showed abnormal metallic conductance behavior in the 1 wt. % MWNT/BaTiO3 nanocomposite. It was proposed to be due to the additional subgrain boundary between MWNT and BaTiO3 matrix, which led to transformation from an impurity-scattering mechanism to a dominant lattice-scattering mechanism in the MWNT/BaTiO3 nanocomposites as the content of carbon nanotubes increased. Based on observed unique electrical properties, bilayer ceramics stacked by one layer of MWNT-free BaTiO3 and another layer of MWNT/BaTiO3 nanocomposite were fabricated and showed excellent rectification property.
ACCESSION #
16581738

 

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