Graphene is a 2D single layer of carbon atoms, superior to graphite in mechanical properties and thermal conductivity. Polymer/graphene composites can be fabricated using several techniques, however this study analyzed a solid state in situ method for the creation of polyamide-6 (PA6)/graphene composites. Thermal conductivity was measured using a Thermal Constant Analyzer by transient plane source method. Thermal conductivity of PA6-graphene composites increased with the increase of ...
Nano-sized materials with large aspect ratios are found to be effective as second fillers for the formation of 3D thermally conductive networks in polymer composites. In this study, multi-walled carbon nanotube (MWCNT) was incorporated as second filler for polymer composites. A thermal analyzer was used to measure thermal conductivity of composites at room temperature. Expanded graphite and MWCNT, as fillers, effectively enhanced thermal conductivity of the composites due to its ...
In this study, some of the most commonly used measurement techniques for thermal conductivity and interfacial contact resistance of bulk and thin film materials are analyzed. For thermal analysis of bulk materials, the laser flash diffusivity method, the steady-state absolute method, comparative technique, and transient plane source (TPS) method are most used. The absolute and comparative technique allow for large sample sizes to be measured, but requires the longest time ...
In this study, sintering parameters in conventional pressure-less sintering are analyzed and the effects of uncoated, Cu(Ni)-coated, and Cr-coated diamond particles are compared for their bulk thermal conductivities. Thermal conductivity was measured at room temperature using a Thermal Constant Analyzer. The addition of diamond particles caused a decrease in the thermal conductivity due to facial air gaps in the composites....
Tetrahedrite is a naturally occurring mineral, possessing a high figure of merit (ZT), used to evaluate the efficiency of thermoelectric (TE) materials. Phase stability and thermoelectric properties of single phase nanocrystalline Zn-doped tetrahedrite was studied. Thermal conductivity was directly measured using a transient plane source technique. It was observed that Zn, and other transition metals, reduced the thermal conductivity significantly due to increased phonon scattering....
