| Abstract from DBPedia | Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%. Strictly speaking, some tests measure the "accessible void", the total amount of void space accessible from the surface (cf. closed-cell foam). There are many ways to test porosity in a substance or part, such as industrial CT scanning. The term porosity is used in multiple fields including pharmaceutics, ceramics, metallurgy, materials, manufacturing, petrophysics, hydrology, earth sciences, soil mechanics, and engineering.ポロシティ（porosity, void fraction）とは、固体物質が小孔や割れ目、粒子間空隙などの空間（void, pore）を含む量を表す尺度。物質の全体積に占める空間の体積の割合で定義され、0 - 1または0 - 100%の値を取る。この概念が用いられる分野には薬剤学、窯業、金属工学、物質科学、製造業、地球科学、土質力学などがある。 (Source: http://dbpedia.org/resource/Porosity) |
