The material

Structure properties

Property Material type (graded by main pore size range), μm
100-200 140-315 200-400 315-630 630-1000 1000-1600 1600-3000
Porosity, % 55±5

Filtration degree, μm

 5 10-15 25-35 40-60 80-110 120-150 200-250
Specific surface m2 /m3 18300 12500 9700 6300 4600 2800 1400
Darcy permeability , m2 0.6×10-11 0.7×10-11 0.9×10-11 3.1×10-11 7.5×10-11 15.8×10-11 23.1×10-11
Forchheimer permeability (ki),  m

1.5×10-5

3.3×10-5

3.5×10-5

3.6×10-5

3.8×10-5

4.2×10-5

19.0×10-5

Specific quantity of pores

on the surface, pcs./m2

26.6×106 11.6×106 6.7×106 2.6×106 1.0×106 1.0×106 1.0×106

Specific quantity of air necks

on the surface, pcs./m2

83.7×106 36.4×106 20.9×106 8.4×106 4.3×106 1.5×106 0.35×106

Mechanical properties 

Property Material type (graded by main pore size range), μm
100-200 140-315 200-400 315-630 630-1000 1000-1600 1600-3000
Ultimate compressive strength, MPa 118 105 59 58 49 37 32
Yield point at compression, MPa 44 39 26 24 20 21 20
Ultimate tensile strength, MPa 33 29 16 16.5 14 12 8
Yield point at tensile, MPa 30 26 14 16 13 13 7
Ultimate shear stress, MPa 41 36 34 30 25 26 -
Young's modulus, GPa 3.5 3.1 2 1.9 1.7 1.7 1.6
Elongation, % 0.25 0.29 0.38 0.27 0.32 0.3 0.12

Physical properties

Property Material type (graded by main pore size range), μm
100-200 140-315 200-400 315-630 630-1000 1000-1600 1600-3000
Heat conductivity, W/(m·K) 30-50
Heat capacity at vacuum, J/(kg·K) 380-420
Electrical conductivity Sm/m 4.8-7.2×106