Effective thermal conductivity of porous strontium oxide and strontium carbonate samples

Abstract

Correlation between site preference and magnetic characteristics of self assembled strontium ferrite dot array on functionalized multi-walled carbon nanotubes

Investigation of thermophysical properties of alates (swarmers) termite wing as potential raw material for insulation

“…This agrees with the expression of [40]. Several researchers and authors including [10], [15], [28], [41], [42], and [43] have severally defined thermal diffusivity  as the ratio of thermal conductivity k to thermal capacity…”

Effect of thermal coarsening on the thermal conductivity of nanoporous gold

“…For large pores and high porosity (above 95%), thermal radiation becomes significantly important [24]. However, in the present measurement, thermal conductivity generated from thermal radiation [23] is calculated to be\10 -5 W m -1 K -1 . So, the heat transfer in pores can be neglected compared with the conduction in solid phase.…”

“…In general, the convection in nanosized pore can be neglected [23]. In a vacuum level of 10 -4 Pa, the heat conduction in pores occurs in the free molecular regime, then the gas conductivity is also negligible.…”

Thermal characterization of nanocrystalline porous CePO4ceramics

“…As reported previously [28][29][30], density variations and hence porosity variations caused by the sintering temperature of the samples under investigation can affect the thermal conductivity value. By considering porous ceramics as a two-phase network in which pores are randomly embedded in a solid matrix, the thermal diffusivity of the specimen is given by the expression, k c ð pÞ ¼ Philosophical Magazine 725 conductivity of the specimen having porosity p; 0 and C 0 are the density and specific heat capacity of the sample with zero porosity [35].…”

“…In the case of heterogeneous materials such as ceramics, local variation in thermal parameters can occur because of the presence of different solid phases, pores, boundary resistance, etc., and thereby affect the propagation of thermal energy carriers [28][29][30][31][32]. The appearance of porosity amounts to a new phase in ceramic materials prepared through the gel route.…”