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Determination of the size of particles of highly dispersed materials by low temperature nitrogen adsorption |
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| Authors: | A V Zhilkina A A Gordienko N A Prokudina L I Trusov G M Kuz’micheva N A Dulina E V Savinkina |
| Institution: | 1575. Moscow State University of Fine Chemical Technologies, Moscow, 119571, Russia 2575. Association ASPECT, Moscow, 119571, Russia 3575. Institute of Single Crystals, National Academy of Sciences of Ukraine, Kharkov, 310001, Ukraine |
| 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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