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Powder Material

Powder Material. Physical Properties of Bio-Materials (V). Poching Wu, Ph.D. Department of Bio-Mechatronic Engineering National Ilan University. Particles Characteristics. Shape Mean Particle Size Density Surface Activity Mechanical Strength Dust Formation.

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Powder Material

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  1. Powder Material Physical Properties of Bio-Materials (V) Poching Wu, Ph.D. Department of Bio-Mechatronic Engineering National Ilan University

  2. Particles Characteristics • Shape • Mean Particle Size • Density • Surface Activity • Mechanical Strength • Dust Formation

  3. Fineness Modulus & Average Diameter

  4. Geometric Mean Diameter • dgw = geometric mean diameter, m • di = diameter of sieve opening of the i’th sieve, m • di+1= diameter of opening in next larger than i’th sieve (just above in a set), m • di= geometric mean diameter of particles on I’th sieve, m • Wi = weight fraction on i’th sieve

  5. Geometric Standard deviation • Sgw = geometric standard deviation, m

  6. Equivalent Spherical DiameterStokes’ Diameter, de where  = viscosity, poise p = sample density, g/cm3 l = fluid density, g/cm3 g = gravity, 980 cm/sec2 h = Height, cm t = time, sec

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