Some researchers argue that the anomalous k enhancement data, for nanofluids, is caused by inaccuracies of thermal measurement methods. In this paper, measurements on thermal conductivities of nanofluid mixtures (alumina/water) by means of two different methods are accomplished. The thermal conductivity was measured, and through the laser flash method, with the NETZSCH LFA 447 NanoFlash. Five samples of nanofluid, with varying alumina concentration was tested (0.1%, 0.5%, 2.0%, 3.0%, and 4.0%). The deviations between the ...
Author(s): Bernardo Buonomo, Laura Colla, Laura Fedele, Lorenzo Marinelli, Oronzio Manca
Graphite papers can enhance mechanical properties while lowering electrical properties, however, to generate conducting membranes, the chemical and thermal characteristics of the papers require further reduction. In this study, mercaptobenzene (MB) functionalized graphite and epoxy-based hybrid membranes were prepared and analyzed. A thermal analyzer measured the thermal conductivity of the samples using the transient plane source (TPS) method. Results showed that the powder-pressed pellets made of graphite-MB-gold nanoparticles (AuNPs) had ...
Author(s): Ayesha Kausar
The aim of this study was to fabricate transparent polymers with high thermal conductivities for applications in electronic packaging. Characteristics of the inorganic filler, calcium fluoride (CaF2), and the polymer matrix were examined, and thermal conductivity was measured using a thermal analyzer based on the transient plane source (TPS) method. Results showed that the thermal conductivity of the composites increased with CaF2 content. This study was the first to report ...
Author(s): Andre Bernard, Katrin Albrecht, Martina Brulisauer, Rene Schneider, Stefan R. Luthi, Thomas Geiger
The purpose of this study was to fabricate and analyze the physical properties of polyacrylate–gold nanocomposites (PGNs) with gold nanoparticles (GNPs) as their nucleation agents. The transient plane source (TPS) method was used to measure the thermal properties of the polyacrylate–gold nanocomposite foams (FPGNs) and PGNs. Results showed that the addition of GNPs improved thermal conductivity of the PGN materials, but as the size of GNPs increased, the ...
Author(s): Chih-Wei Peng, Jui-Ming Yeh, Kung-Chin Chang, Mei-Chun Lai, Pei-Shan Wu, Wei-I Hung, Yen-Hao Lin
Aerogels are nano-porous materials with impressive thermal insulation properties. This study uses a new theoretical model to predict the effective thermal conductivity of aerogels based on gas and solid conduction, as well as thermal radiation. A thermal constant analyzer measured the influence of gas pressure, atmosphere, and temperature on the thermal conductivity of nano-porous materials using the transient plane source (TPS) method. Results showed that the experimental thermal conductivity values ...
Author(s): Dan Dan, Hu Zhang, Wen-Quan Tao
