Abstract

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.

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