Particle size distribution analysis is one of the useful tools used to characterize the physical properties of a powder system. It refers to the measurement of the spread of particles in a powder material in various sizes. In order to understand the behavior of a powder, particle size distribution analysis is performed on the powder itself.
The purpose of particle size distribution analysis is to provide an estimation of the size and its effects on powder characteristics. It is important to have a thorough understanding of the powder so that its formulation and processing can be accurately controlled and optimized.
The particle size distribution analysis of a powder may be performed using a variety of techniques. The most common techniques are particle counting, microscopy, sieve analysis, laser diffraction and image analysis. Each technique has its own applications, advantages and disadvantages.
Particle counting involves counting the number of particles in a given volume of powder. The particles are counted by visual inspection or with the assistance of a microscope. This technique is most effective for small particles as it can measure the number of particles per unit volume.
Microscopy involves the study of particles under a microscope. It is used to determine the shape, size and surface area of each particle. Microscopes are available in manual and automated formats, depending upon their application.
Sieve analysis is a mechanical analysis of a powder sample. It involves sieving the sample through a series of sieves in order to divide the sample into size fractions. This technique is particularly useful for determining the amount of coarse and fine particles present in a sample.
Laser diffraction is a technique used to measure the size of particles. It involves passing a laser beam through the sample, which causes the particles to scatter. The pattern of scattering is then used to determine the size of each particle.
Image analysis is a method of analyzing the characteristics of a powder by analyzing images taken by a digital microscope or CCD camera. It is used to determine the shape and size of the particles in the powder.
The results obtained from the particle size distribution analysis can be used to characterize the physical properties of a powder system. It is important to have a thorough understanding of the powder so that its formulation and processing can be accurately controlled and optimized. By conducting particle size distribution analysis, the behavior of a powder can be better understood.
