Particle Characterization: Light Scattering Methods potx

[...]... for this technology being widely replaced by light scattering methods, especially for sizing particles smaller than a few millimeters 10 1.2.2 CHAPTER 1 SEDIMENTATION METHODS - SIZING (0.05-100 µm) Sedimentation is another classical particle classification and sizing method for liquid-born particles Sedimentation methods are based on the rate of settling of particles in a liquid at rest under a gravitational... and researched light scattering, polymer physics, and colloid science over the following twelve years in three countries, I came back to the field of particle characterization, knowingly and willingly, with a higher level of understanding The present book is intended to cover the theory and practice of one important branch in modern particle characterization technology — light scattering methods The topics... really just a small particle! Thus, the range of sciences and technologies that study particles stretches from astrophysics to high-energy physics A person who knows nothing about particle characterization may think that this is a part of particle physics and that all particle physicists are actually studying only micron-sized particles Therefore, we have to define the type of particles which interest... method for particle characterization wholly depends on the requirement of the application and the accessibility to a suitable analytical technique Users often have to make a compromise when choosing the best method for their particulate materials 1.2 A Survey of Particle Characterization Technologies Other Than Light Scattering Methods In this section, we describe common particle characterization methods. .. applications of particle science and technology Meanwhile, due to the evolution of other modern technologies, e.g., lasers, computers and automation, the methods involved in particle characterization have changed considerably Several conventional particle characterization methods, such as sieve analysis and sedimentation analysis, have gradually been replaced by non-invasive methods based on lightmatter... on suspension density, such as the methods using manometers, aerometers, or various divers; and measurements based on particle attenuation or scattering to radiation of light or x-rays All methods require calibration of the sedimentation device and concentration detection PARTICLE CHARACTERIZATION OVERVIEW 11 The foundation of a sedimentation experiment to deduce particle size information is the Stokes... number of particles and the volume of each individual particle The number of pulses detected during measurement is the number of particles measured, and the amplitude of the pulse is proportional to the volume of the particle: PARTICLE CHARACTERIZATION OVERVIEW 13 In Eq 1.2, U, V, , i, f, and R are the amplitude of the voltage pulse, the particle volume, electrolyte resistivity, aperture current, particle. .. method and the completeness of separation, a measurement may detect or sense only one particle at a time or a group of particles having the same property value according to how they are separated or fractionated Two typical methods used to size one particle at a time are optical particle counting and the Coulter PARTICLE CHARACTERIZATION OVERVIEW 7 Principle (electrical sensing zone method) The signal... the American Physical Society’s Particle Physics Division and finds himself like Gulliver among the Lilliputians Even when studying particles of similar dimension, astronomers have different approaches to characterize particles in the sky when compared with their industrial counterparts even though both of them may use the same principle, for example, light scattering The particles covered in this book... dependent on particle size distribution Out of necessity, there are many 6 CHAPTER 1 technologies that have been developed and successfully employed in particle characterization, especially ones for sizing particles from nanometers to millimeters There were more than 400 different methods applied in measurement of particle size, shape and surface area in 1981 [1] Prior to the adoption of light- based . Dispersion References Chapter 2 LIGHT SCATTERING - The Background Information 2.1. Light Scattering Phenomena and Technologies 2.2. Light Scattering Theory - an Outline 2.2.1. Scattering Geometry 2.2.2. Scattering. Time-Averaged Scattering Intensity of Particles 2.2.4. Scattering Intensity Fluctuations of Particles Doppler Shift ACF and Power Spectrum 2.3. Other Light Scattering Technologies 2.3.1. Static Light Scattering 2.3.2 y0 w0 h0" alt="" Particle Characterization: Light Scattering Methods Particle Technology Series Series Editor Professor Brian Scarlett Technical University of Delft The Kluwer Particle Technology