比表面積は総表面積を質量で割った値で、粉末や多孔質固体で使われます。

主要な公式

SSA = S / m
Spherical estimate: SSA approx 6 / (ρ x d)
BET: gas adsorption is used to estimate monolayer surface coverage.

実用例

Example: if S = 12 m2 and m = 4 g, SSA = 12 / 4 = 3 m2/g.
重要な注意: BET values are laboratory measurements. Geometric formulas are only rough estimates for non-porous particles.

関連リソース

Use Sphere, Ellipsoid, unit conversion, and surface area vs volume.