Composite spray coatings containing Al2O3 and AlN were prepared and their tensile bonding strength, microhardness, corrosion behavior and thermal conductivity were compared to those of pure Al2O3. The goal of this study was to identify a spray coating with an improved thermal conductivity over that of Al2O3 for use in coating heat exchangers, furnace walls, heat pipes, etc. The coatings that were prepared had AlN : a-Al2O3 ...
Author(s): Hongwei Yang, Shan-Tung Tu, Weiling Luan
The effective thermal conductivity and thermal diffusivity were investigated for polyaniline (PANI) composites containing iron and manganese at varying temperatures. Composites were prepared containing 100% Fe, 50% Fe and 50% Mn, and 100% Mn. It was determined that both the effective thermal conductivity and effective thermal diffusivity increased with increasing iron content. The authors attribute this increase to the increase in crosslinking density between the nitrogen in PANI and Fe....
Author(s): G. P. Joshi, N. S. Saxena, S. C. K. Mishra, S. Verma, T. P. Sharma, V. Dixit
A rigid, self-supporting material derived from flax tow was prepared and its mechanical, thermal, hydrous, and acoustic properties were investigated. The study was performed to determine if this material would be a viable option for use as a biodegradable thermal and acoustic insulation in walls. The effect of flax-tow size after grinding on these properties was also investigated. It was determined that increasing the flax-tow size resulted in a reduction ...
Author(s): Brice Mboumba-Mamboundou, Malek Benzeggagh, Michele Queneudec, Nemr El Hajj, Rose-Marie Dheilly, Zoheir Aboura
The thermal and rheological properties of n-octadecane, a phase change material, with dispersed TiO2 nanoparticles were investigated at varying temperatures. The properties were investigated in both the solid and liquid phases, with varying mass fractions of TiO2 nanoparticles. The thermal conductivity was found to be enhanced in all of the composite samples when compared to the thermal conductivity of pure n-octadecane, and the maximum enhancement occurred at 3 wt. % TiO2 in ...
Author(s): Ali A. Alemrajabi, Mamoun Muhammed, Muhammet S. Toprak, Nader Nikkam, Rahmatollah Khodabandeh, Sadegh Motahar
Zn-Se alloys have potential applications in blue light emitting diodes and blue diode lasers, as well as in white LEDs and infrared lenses. Se-In alloys have potential applications in solar cells due to their energy band gap, which is close to the optimum range for solar energy conversion. The thermo-physical properties of these two types of alloys have been investigated to further their applicability in industrial applications. The thermal conductivity, ...
Author(s): K. Singh, N. Mehta, N. S. Saxena
