In this study, the influence of silver phase on thermal properties of BaTiO₃/Ag composites are investigated. A thermal analyzer was used to measure the thermal conductivity and thermal diffusivity of the composites at ambient and elevated temperature up to 175°C. Results found that for a fixed silver composition, the thermal conductivity of the composite remained nearly constant below its tetragonal to cubic transformation temperature (120°C), then decreased and stayed ...
This article investigates the effects of improving thermal conductivity of polyvinylidene fluoride (PVDF) /expanded graphite (EG) composites using the ball milling method. PVDF is widely used in the field of thermal conductivity due to its superior mechanical properties, chemical resistance, and oxidative stability. Thermal conductivity of the composites was measured, using the transient plane source method. Results showed thermal and electrical conductivities of PVDF/GNSs composites improved due to larger ...
This article investigated new macro-cellular carbons, called carbon meringues, formed by whipping an aqueous solution of tannin until liquid foam is obtained. Carbon meringues were fully investigated, and thermal conductivity was analyzed using a transient plane source method. Thermal conductivity of carbon meringues was found to be slightly higher than that of tannin-based CVC foams of low density. Carbon meringues maintained higher mechanical strength in the same range of density....
Using a gelation-freezing method, diatomite-derived porous silica ceramics with high porosities up to 90% were fabricated. Diatomite particles contain large numbers of meso- and micropores, intrinsically reducing the thermal conductivity. In this study, thermal conductivity of the sintered specimens was measured. Results indicate that ceramics had a low thermal conductivity due to their very high porosity....
With little information available about the thermal conductivity of sprayed concrete, this article investigates sprayed concrete aging from five hours after casting to 20 days. Thermal conductivity was measured. Thermal conductivity was found to be higher at an early age and decreased as the concrete aged. Thermal conductivity is found to have an exponential relationship with density, regardless of mix constituents....
