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Unprecedented formation of metastable monoclinic BaCO3 nanoparticles |
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| Authors: | Reto Strobel Marek Maciejewski Alfons Baiker |
| Affiliation: | a Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092 Zurich, Switzerland b Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, HCI, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich, Switzerland |
| Abstract: | Barium carbonate nanoparticles (50-100 nm) were prepared by flame spray pyrolysis. The rapid quenching during the preparation process resulted in the unprecedented formation of pure monoclinic BaCO3. The as-prepared materials were characterized by electron microscopy, X-ray diffraction as well as by thermogravimetric and differential scanning calorimetric analyses. At ambient conditions the metastable monoclinic phase transformed easily into the thermodynamically stable orthorhombic BaCO3 (witherite) within a few days. |
| Keywords: | Flame spray pyrolysis Barium carbonate Nanomaterials Crystal structure |
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