Yttria-stabilized zirconia (YSZ) was synthesized by the spark plasma sintering process to generate pore-free, homogenous bulk samples that were then tested for thermal conductivity, which was measured by two separate methods: TPS and LFT. The TPS method was found to be better for measuring of thermal conductivity in this specific case. Using the phonon-hopping model (PHM) the authors were able to determine how grain boundaries of the bulk samples affected ...
Two calcium silicate boards of different densities, porosities and pore size were analyzed for their thermal properties, specifically thermal conductivity. The boards were heated from room temperature to 400°C and the thermal conductivity was monitored during this time. A separate experiment 'aged' the boards first by heating at 1000°C for 4 hours before testing the thermal conductivity from room temperature to 400°C once again. The experimental results were compared with three ...
Using the TPS method, the thermal conductivities of a variety of metallic hollow sphere structures (MHSS) were measured. The thermal conductivities were also calculated using Misnar's analytical model and compared to the experimental results, with good agreement between the two sets of data....
Using the TPS method, the authors measured the thermal conductivity and thermal diffusivity of samples of Swedish wood. They also looked at the effect of density, porosity and anisotropy on the measured thermal properties. Both longitudinal and transverse measurements were taken at temperatures ranging from 20°C to 100°C and an increase in temperature resulted in a slight increase in thermal conductivity. The types of mechanisms that lead to heat conduction ...
Researchers have developed an innovative processing route for producing microcellular cordierite ceramics within a three-step method. A) constructing ceramic-filled foams by heating a mixture of polysiloxane, expandable microspheres, talc, and alumina B) cross-linking the foamed body, and C) with the use of sintering, convert the body into microcellular cordierite ceramics....
