Size-controlled hydrothermal synthesis of monodispersed BaZrO3 sphere particles by seeding

- Monodispersed BaZrO3 spheres were prepared by hydrothermal reactions.
- The particle diameter was gradually controlled from 0.20 μm to 3.5 μm by seeding.
- The seed-mediated BaZrO3 sphere proceeded by a simple seed growth mechanism.
- A Zr-TEOA complex played an important rule to form the uniform BaZrO3 spheres.

Monodispersed barium zirconate (BaZrO3) fine particles with a spherical shape have been synthesized by hydrothermal reactions using barium hydroxide and a Zr-triethanolamine (TEOA) complex. The particle mean diameter was gradually controlled in a range from 0.20 μm to 3.5 μm by change in the added amount of seed nanoparticles. The mechanistic characterization of the seed-mediated BaZrO3 sphere synthesis revealed that the particle growth obeyed a simple seed growth mechanism. In the present system, utilization of the Zr-TEOA complex played an important rule to prevent uncontrollable nucleation to form the uniform BaZrO3 fine particles with narrow size distributions.

Graphical Abstract194