The thermal conductivity of two novel polyurea/silica ORMOSILs (Organically Modified Silicates) created for use in high temperature optical applications. The purpose of these new materials was to replace the materials currently in use which start to degrade in high temperature situations. The transmission/absorption, refractive index, thermal conductivity, and thermal stability of the new materials was investigated to determine their suitability. The thermal conductivities measured were 0.26 and 0.27 W/mK ...
Samples of binary reinforced composites were created by mixing varying fractions of palm fiber (20, 30, 40, and 50 weight %) in a phenoformaldehyde (PF) matrix. The thermal conductivity and thermal diffusivity were measured using Transient Plane Source equipment. The team discovered that the thermal conductivity and thermal diffusivity of the composites decreased as the amount of palm fiber increased....
Phenolic resin impregnation was combined with liquid silicon infiltration to create a carbon/silicon carbide composite. The potential application for this material is in disc brakes in vehicles due to their oxidation resistance and friction behaviour. The density of the composite was altered until a final value of 2.10g/cm3 was achieved. The thermal conductivity of the composite was measured using the TPS method, and was determined to be 48.72 W/...
This article discusses the creation and characterization of albumin based rigid and elastic foams. These foams were created using formaldehyde as the hardener for the protein, while camphor was used as the plasticizer. Crosslinking was carried out using a traditional or microwave oven. Samples differed in the amount of water, formaldehyde, and camphor added, and in the amount of time that they spent in the oven. The thermal conductivity was ...
This research investigates the core materials used to create vacuum insulation panels. Of particular interest to the investigators was the thermal conductivity of the initial materials (usually powders) under different pressures. The researchers designed their own powder sample cell holder. The powders tested were low density silica powders, and using the sample set up the team was able to test them along a pressure range from atmospheric pressure to 0.1mbar. ...
