Estimation of Agglomeration Degree and Nanoparticles Shape of Zirconia Nanopowders

Abstract

Abstract The influence of different surfactants (Trilon B, Polyammoniumacrylate and Neonol) and mineralizers (HCl, KOH, CH 3 COOH, etc.) on agglomeration degree of zirconia nanopowders obtained by precipitation technique was investigated. By adding of surfactants and mineralizers the different phase composition, particle size and agglomeration degree of zirconia nanopowders were obtained. The comparison between experimental specific surface area (SSA) value and calculated surface area for nonagglomerated spherical particle model show that experimental value of SSA bigger than calculated value. We proposed that low calcining temperatures (less than 700 °C) lead to formation the zirconia particles with cylindrical form. When taking into account the contact area between the particles in this model, we recalculate the surface area of powders and get better fit to experimental value.