期刊
THERMOCHIMICA ACTA
卷 445, 期 1, 页码 23-26出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tca.2006.03.020
关键词
flame spray pyrolysis; barium carbonate; nanomaterials; crystal structure
Barium carbonate nanoparticles (50-100nm) 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. (c) 2006 Elsevier B.V. All rights reserved.
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