Electrical conductivity and porosity relationship in metal foams

Highly Conductive Ag Nanoparticulate Films Induced by Movable Rapid Thermal Annealing Applicable to Roll-to-Roll Processing

“…The average particle size was 60.5 nm, and the resistivity was 70.2 X cm, which is 43 times that of bulk silver. [12][13][14][15] As the peak temperature increased over 500 C, the resistivity was less than twice that of bulk silver. 10 Thus, at powers lower than 25 W, the temperature is not high enough to decompose the shell.…”

Open cell conducting foams for high synchrotron radiation accelerators

“…The WP unit cell consists of a certain arrangement of (irregular) polyhedra, namely two pentagonal-face dodecahedra (with tetrahedral symmetry T h ) , and six tetrakaidecahedra (with antiprysmatic symmetry D 2d ) featuring two hexagonal and twelve pentagonal faces [11]. A computer generated WP honeycomb is displayed in In the quasi-static limit λ −→ 0, the conductivity of OCMFs can be computed using ef-fective medium theory (EMT), for which several formulations exist (see, e.g., [15], [16] for a review). These include: i) the self-consistent approach [17], credited to Bruggemann, where inclusions are thought of as being embedded in the (actual) effective medium; ii) the differential scheme, whereby inhomogeneities are incrementally added to the composite 1 , until the final concentration is reached, so that at each step the inclusions do not interact and do not modify the field computed at the previous step [18]; iii) the effective-field methods, whereby interaction among the inclusions is described in terms of an effective field acting on each inclusion, accounting for the presence of the others.…”

Conducting Foams for High Synchrotron Radiation Accelerators

“…A simplified model, consisting of stacked square-mesh grids has been used by Monti et al [10] to investigate their RF shielding properties. In the quasistatic limit the conductivity of metal foams has been computed using various formulations of effective medium theory (EMT) -(see, e.g., [11]- [12] for a review). The differential formulation of EMT [13] agrees very well with measurements [14].…”