Effect of the pore volume fraction on the thermal conductivity and mechanical properties of kaolin-based foams

Cumulative pore volume, pore size distribution and phases percolation in porous inorganic polymer composites: Relation microstructure and effective thermal conductivity

“…Many researchers have used these recent time the advantage to design new class of porous matrices [4][5][6][7][8]. The global mechanism of the consolidation is resumed to the conversion of the high viscous suspension into a rigid and porous solid [2,3].…”

“…The addition of blowing agents changes the porosity from nanometric and meso to nanometric, meso and ultra-macro sizes. Hydrogen peroxide as blowing agent [5], redox reaction of aluminum powder in alkaline solution [4,9] or that of metallic Si [5][6][7][8] have been used as low temperature, low-energy , environmentally-friendly and sustainable processes for the production of ultra porous inorganic matrices in comparison to the high temperature treatment for burnout of fugitive additives and sintering with the aim to achieve porous ceramics [5][6][7][8][9][10][11][12]. Although the effective possibility of the above techniques to be used for the production of porous inorganic polymer without thermal treatment, the final products still suffer homogeneity and the difficulty for the control of the pore shape, pore size and correlation of the properties of the fresh paste to the final microstructure in relation with the bulk chemical composition of the initial formulation.…”

“…Medri et al [5], Bourret et al [6] and Kamseu et al [4] used the mathematic equation (1) to calculate the total porosity of the obtained foams.…”

A new approach to modeling the effective thermal conductivity of ceramics porous media using a generalized self-consistent method

“…Landauer developed a model to predict effective thermal conductivity of porous media which is defined as a mixture of two phases [4][5][6][7]. The percolation model assumes a completely random distribution of solid and gas that is equivalent to an Effective Medium Theory (EMT) [8][9][10]. Kou et al [3] proposed a self-similar fractal model.…”

Temperature dependence of Young׳s modulus of silica refractories

“…the volume fraction of pores), which is known to provide one of the lowest estimates of the porosity dependence of Young's modulus (which is often a quite realistic one for moderately high porosities) [20]. Other relations, in particular the power-law relation (Gibson-Ashby relation), yield much higher values and are known to provide appropriate predictions mainly for highly cellular materials with porosities above 70% [21]. Now, using this exponential relation, Eq.…”