On-line particle size analysis

Superlattices of silver nanoparticles passivated by mercaptan

“…XRD spectra were obtained from the Rigaku D/max-2400 diffractometer (Cu Kα). In order to determine the average size of the silver nanoparticles, the method of the XRD linewidth at half-maximum intensity [18] was used. The relation between the linewidth at half-maximum intensity B and the average size of the nanoparticles d was given by d = 0.89λ/B cos θ, where θ is the diffraction angle and λ is the wavenumber of the x-ray (in this paper, λ = 1.5405 Å).…”

The manipulation of natural mineral chalcopyrite CuFeS2via mechanochemistry: properties and thermoelectric potential

“…Based on the measured data, the granulometric specific area, S g , was calculated. 21 All measurements were performed in triplicate. For the calculation of S g , the following formula was usedwhere ρ is density and D [3,2] is the surface area moment mean diameter.…”

Rapid particle sizing by photosedimentometry

“…The theory of photosedimentation is well established (Allen 1981) and is widely used in a number of commercially available instruments. The attenuation of a light beam traversing a suspension is monitored, and may he related to the number (n,) of particles (per gram of powder) of diameter d, by application of the Beer-Lambert Law:…”

“…If the particles are allowed to settle tranquilly as a dilute suspension and certain assumptions about the particles are made, then Stokes's law can he applied (Allen 1981):…”