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Journal of Nanomaterials
Volume 2013, Article ID 842963, 7 pages
Research Article

Investigation on the Electrical Conductivity of Transformer Oil-Based AlN Nanofluid

1State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China

Received 26 July 2013; Revised 1 November 2013; Accepted 9 December 2013

Academic Editor: Theodorian Borca-Tasciuc

Copyright © 2013 M. Dong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Aluminum-nitride-(AlN)-transformer oil-based nanofluid was prepared by dispersing AlN nanoparticles in transformer oil. The composition-dependent electrical conductivity of AlN-transformer oil nanofluid was investigated at different ambient temperatures. The results indicate the nonlinear dependences of the electrical conductivity on volumetric fraction and temperature. In comparison to the pure transformer oil, the electrical conductivity of nanofluid containing 0.5% AlN nanoparticles has increased by 1057 times at 60°C. By considering the electrophoresis of the AlN nanoparticles, a straightforward electrical conductivity model is established to modulate and understand the experiment results.