This study aimed to develop a new technique for thermal management in high powered gallium nitride (GaN) electronic and optoelectronic devices. The researchers integrated GaN with diamond through the process of depositing high-quality nanocrystalline diamond films directly onto the GaN material at temperatures between 450-500°C. Highly controlled growth conditions for the diamond ensured that it was of good quality. Thermal conductivity measurements using the laser flash method were performed ...
This research studied the effect of the addition of vinyl-modified silica and raw silica additions to polymer-silica nanocomposite foams. Extensive physical property characterization was undertaken after their addition to quantify their influence. TEM found that silica particles added through the vinyl-modified silica dispersed better than the raw silica. This created foams with a higher density and smaller cell size. A slight reduction in the thermal conductivity after the additions was ...
The purpose of this study was to produce an environmentally friendly foam using tannins, that did not contain any formaldehyde or blowing agents. Two experimental tannin foams were compared to two conventional foams, one containing both formaldehyde and blowing agents, and the other containing only a blowing agent. A variety of physical properties were assessed to determine if the new green formulation would be an appropriate replacement, this included thermal ...
The transient plane source technique was used to measure the thermal conductivity of construction materials at room temperatures. The samples were tested under both dry and partially wet conditions. It was found that the thermal conductivity increased significantly with increasing water content....
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 ...
