The air permeability specific surface of a powder material is a single-parameter measurement of the fineness of the powder. The specific surface is derived from the resistance to flow of air (or some other gas) through a porous bed of the powder. The SI units are m2·kg−1 ("mass specific surface") or m2·m−3 ("volume specific surface").
Read more about Air Permeability Specific Surface: Significance, Methods
Famous quotes containing the words air, specific and/or surface:
“Only the gaunt fierce bird
Flies, merciless with fear
Lest air hold him not,
Beats up the scaffold of space
Sick of the world’s rot
God’s hideous face.”
—Allen Tate (1899–1979)
“Self-esteem and self-contempt have specific odors; they can be smelled.”
—Eric Hoffer (1902–1983)
“Just under the surface I shall be, all together at first, then separate and drift, through all the earth and perhaps in the end through a cliff into the sea, something of me.”
—Samuel Beckett (1906–1989)