This article is an excellent showcase of the ability of the TPS to measure the thermal conductivity of saturated samples. The author compares the thermal property measurement of dry and wet (40% by wet weight) building materials. The fast test time of the TPS enables it to get a reading prior to moisture redistribution affecting the measurement. A low temperature rise during the test further facilitates this. The design of the ...
The thermal conductivity of polyamide 12 (also known as nylon 12) in loose powder and bulk forms were determined at varying temperatures. The authors stated that there was a lack of information available on the thermal conductivity of this polymer, which is necessary for assessing the material’s performance during laser sintering. It was determined that the thermal conductivity of the powder increased with increasing temperature, while the thermal conductivity of the ...
Ultralow density silica aerogels were formulated by sol-gel process using tetramethyl orthosilicate as the precursor. A supercritical drying step was performed using acetonitrile solvent extraction. These aerogels were found to have a high specific surface area (~812m2/g) and they were found to be excellent thermal insulators with thermal conductivities ranging from 0.024 to 0.043 W/m K at temperatures up to 400oC....
Calcium is partially substituted by bismuth in the Ca1-xBixMnO3-delta (x=0.00, 0.02, and 0.05) system in order to determine how this substitution affects the electrical resistivity, thermopower, and thermal conductivity. The experimental results were then used to calculate the thermoelectric figure of merit for each sample. The highest observed figure of merit was 0.047, which represented a 487% increase over the unsubstituted sample....
Thermoelectric materials are currently being researched as a source of energy in order to reduce carbon dioxide emissions. The efficiency of these materials depends on their Seebeck coefficient, electrical resistivity, and thermal conductivity, as well as the absolute temperature. Cobalt oxides (Ca3Co4O9+delta) have been researched extensively as potential thermoelectric materials because of their high Seebeck coefficient and low electrical resistivity and thermal conductivity. Systems have been studied ...
