Powder Sampling and Particle Size Determination
Powder technology is a rapidly expanding technology and nowhere more than in particle characterization. There has been an explosion of new particle measuring techniques in the past ten year particularly in the field of on-line measurement. One of the main aims of this book is to bring the reader up-to-date with current practices. One important area of interest is the improvements in on-line light scattering instruments and the introduction of ultrasonic on-line devices. Another is the introduction of on-line microscopy, which permits shape analysis in conjunction with particle sizing.
Schools of powder technology are common in Europe and Japan but the importance of this subject has only recently been recognised in America with the emergence of the Particle Research Centre (PERC) at the University of Florida in Gainsville.
- Details all the latest developments in powder technology
- Written by established authority on powder technology
- A comprehensive text covering all aspects of powder technology and handling of particulate solids including characterization, handling and applications
Chapter 3 Particle size analysis by image analysis
Chapter 4 Particle size analysis by sieving
Chapter 5 Fluid classification
Chapter 6 Interaction between particles and fluids
Chapter 7 Gravitational sedimentation methods of particle size determination
Chapter 8 Centrifugal sedimentation methods of particle size determination
aerosol analyzer angle aperture applied ASTM attenuation calibration cell centrifuge Chem classifier coarse coefficient Colloid Conf Coulter principle count counter curve density detector determined diffraction dispersion dynamic light scattering effect electron elutriator equation errors fiber Figure flow fluid fraction frequency geometric standard deviation give graticule gravitational homogeneous Horiba hydrometer image analysis increasing instrument intensity laser beam light scattering limit liquid log-normal log-normal distribution Malvern mass material measurement method microns microscope Mie theory monitoring Nürnberg on-line operation optical Partec particle shape Particle Size Analysis particle size distribution Phys Powder Technol Proc procedure projected area publ pulses range ratio refractive index Reynolds number sample sampler scanning sedimentation sensor settling sieve slurry smaller spheres spherical particles standard deviation Stokes diameter stream surface suspension Syst technique tube ultrasonic undersize values velocity volume concentration wavelength weight x-ray
Page 6 - ... of sampling There are many possible situations in which a sample has to be obtained and conditions often necessitate the use of inferior techniques. Some principles can however be laid down, and they should be adhered to whenever possible: Rule 1. A powder should be sampled when in motion. Rule 2. The whole of the stream of powder should be taken for many short increments of time in preference to part of the stream being taken for the whole of the time. Observance of these rules coupled with...
Page 63 - We realize that the purpose of an average is to represent a group of individual values in a simple and concise manner so that the mind can get a quick understanding of the general size of the individuals in the group, undistracted by fortuitous and irrelevant variations.
Page 70 - Dentritic having a branched crystalline shape; Fibrous regularly or irregularly thread-like; Flaky plate-like; Granular having approximately an equidimensional irregular shape; Irregular lacking any symmetry; Modular having rounded, irregular shape; Spherical global shape.