Synthesis and Ultrasonic Characterization of Nanoparticles Based Advanced Materials and their Applications

The D.Phil. thesis focused on physics and chemistry of nanostructures e.g. nanofibers, nanotubes, spherical nanoparticles based nanofluids and nanocomposites leading to their applications as heat transfer based coolant liquids and dielectric materials with better heat conduction. Ultrasonic and thermal conductivity behaviour of synthesized materials has been studied in a wide range of temperatures and other variable physical conditions. When propagated in materials, ultrasonic waves are influenced by the microstructure, structural in homogeneities, nonlinear thermal/physical properties, reinforcement level of particles in nanocomposites, size and distribution of reinforcements, surface phenomenon etc. The attention has been paid on the ultrasonics based non-destructive characterization of the prepared materials.