Abstract
The average size of particles of highly dispersed materials (Al2O3, TiO2, Y2O3) is calculated from their specific surface areas. The latter is determined with the analysis of sorption capacity of materials with nitrogen at −196°C in the ranges of relative equilibrium pressures of 0.05–0.35 (the Brunauer-Emmett-Teller method, BET) and 0.4–0.7 (the comparative method). Good agreement is obtained between results produced with the comparative method and familiar methods of analysis such as scanning and transmission electron microscopy and small-angle X-ray scattering.
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