Abstract
The initial stage of nanopowder sintering at low temperatures has been theoretically studied. Analytical expressions are obtained to control the nanopowder shrinkage at this stage. They also indicate that the nanopowder densification and the increase in the nanoparticle size at the initial stage of sintering are determined by a nondiffusion mechanism and that they can be calculated with a fluctuational sintering model. The effect of the granulometric composition of nanoparticles on sintering has been studied. It is shown that the shrinkage and the increase in the average particle size in the cases of sintering a nanopowder with a normal size distribution of particles and a nanopowder consisting of the same particles are the same.
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