Contact mechanics of highly porous oxide nanoparticle agglomerates.

ABSTRACT: Efficient nanopowder processing requires knowledge of the powder's mechanical properties. Due to the large surface area to volume ratio, nanoparticles experience relatively strong attractive interactions, leading to the formation of micron-size porous structures called agglomerates. Significant effort has been directed towards the development of models and experimental procedures to estimate the elasticity of porous objects such as nanoparticle agglomerates; however, none of the existing models has been validated for solid fractions below 0.1. Here, we measure the elasticity of titania (TiO[Formula: see text], 22 nm), alumina (Al[Formula: see text]O[Formula: see text], 8 nm), and silica (SiO[Formula: see text], 16 nm) nanopowder agglomerates by Atomic Force Microscopy, using a 3.75 [Formul

SUBMITTER: Fabre A 

PROVIDER: S-EPMC4949302 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature