Engineering of thermal conductivity in functional materials using chemical doping and nanoparticle additives
Master of Philosophy
Institute for Superconducting and Electronic Materials
The intrinsic ability of solid materials to conduct heat is called thermal conductivity (and here is denoted by the symbol κ). It is essential to control the thermal conductivity in functional materials wherever heat transfer plays a key role, such as in thermoelectric devices, "thermal interface" materials for heat management in electronics, biomedical implants and personal protective equipment. Techniques are needed to tailor the thermal conductivity for specific applications. For example, thermoelectric devices require lower thermal conductivity to maximise their efficiency. Such devices offer a way to capture approximately 60-70% of the energy that is converted into unused heat as a secondary by-product of many technological and industrial processes. Consequently, methods to control thermal conductivity are important to improve thermo-electronic devices' efficiency. This thesis focuses on controlling thermal conductivity using chemical doping methods, including embedding a secondary phase of nanoparticles into a primary phase to form a so-called nanocomposite. In this thesis, the laser flash analysis technique was applied as the principal method to understand the thermal transport behaviour among the fabricated materials.
Rahman, Md Rezoanur, Engineering of thermal conductivity in functional materials using chemical doping and nanoparticle additives, Master of Philosophy thesis, Institute for Superconducting and Electronic Materials, University of Wollongong, 2022. https://ro.uow.edu.au/theses1/1365
FoR codes (2020)
4016 Materials engineering, 4017 Mechanical engineering, 4018 Nanotechnology
Unless otherwise indicated, the views expressed in this thesis are those of the author and do not necessarily represent the views of the University of Wollongong.