Microwave Synthesis of CaTiO3 Nanoparticles by the Sol-Gel Method

A technique for the microwave-activated synthesis of calcium titanate nanopowder was proposed. The microwave effect used in the synthesis of CaTiO3 samples when using sodium carbonate as a precipitant allowed obtaining a chemically homogeneous nanopowder with a significant reduction of the process time. References1. Zhang Q., Saito F. Effect of Fe2O3 crystallite sizeon its mechanochemical reaction with La2O3 to formLaFeO3. Journal of Materials Science. 2001;36(9):2287–2290. DOI: https://doi.org/10.1023/a:10175208069222. Bayraktar D., Clemens F., Diethelm S., et al.Production and properties of substituted LaFeO3‑perovskitetubular membranes for partial oxidation ofmethane to syngas. Journal of the European CeramicSociety. 2007;27(6): 2455–2461. DOI: https://doi.org/10.1016/j.jeurceramsoc.2006.10.0043. Reznichenko V. A., Averin V. V., Olyunina T. V.Titanaty. Nauchnye osnovy, tekhnologiya, proizvodstvo[Titanates. Scientific foundations, technology, production].Moscow: Nauka Publ.; 2010. 72 p. (In Russ.)4. Suzdalev I. P. Nanotekhnologiya: fiziko-khimiyananoklasterov, nanostruktur i nanomaterialov[Nanotechnology: physical chemistry of nanoclusters,nanostructures and nanomaterials]. Moscow:KomKniga Publ.; 2006. 592 p. (In Russ.)5. Gusev A. I. Nanomaterialy, nanostruktury,nanotekhnologii [Nanomaterials, nanostructures,nanotechnology]. Moscow: Fizmatlit Publ.; 2007. 416 p.6. International Center for Diffraction Data.7. X-ray diffraction date cards, ASTM

Three-Dimensional TEM Tomography Analysis of Epitaxially Assembled Perovskite Oxide Nanocrystalline Particles

We investigated epitaxial assembly in aggregates of CaTiO3 nanoparticles, which were synthesized under a hydrothermal condition at 150°C using water/ethanol solvent, by transmission electron microscopy analysis combined with a three-dimensional tomography technique. The obtained results indicate that epitaxial assembly is involved in the crystal growth of CaTiO3 nanoparticles, and that in aggregates of CaTiO3 nanoparticles epitaxial assembly occur on their {101} planes.