L. C. Klein—contributing editor
Criteria for Flame-Spray Synthesis of Hollow, Shell-Like, or Inhomogeneous Oxides
Article first published online: 25 APR 2005
Journal of the American Ceramic Society
Volume 88, Issue 6, pages 1388–1393, June 2005
How to Cite
Jossen, R., Pratsinis, S. E., Stark, W. J. and Mädler, L. (2005), Criteria for Flame-Spray Synthesis of Hollow, Shell-Like, or Inhomogeneous Oxides. Journal of the American Ceramic Society, 88: 1388–1393. doi: 10.1111/j.1551-2916.2005.00249.x
Supported by TH Gesuch No. 34/02-3 and the Swiss Commission for Technology and Innovation, TopNano21 No. 5978.2.
- Issue published online: 27 APR 2005
- Article first published online: 25 APR 2005
- Manuscript No. 10623. Received October 24, 2003; approved November 9, 2004.
The influence of metal precursor and solvent composition on the morphology of SiO2, Bi2O3, and other oxide particles made by flame spray pyrolysis (FSP) was investigated. Silica precursors with boiling points Tbp=299–548 K dissolved in xylene were used as well as different solvents (Tbp=308–557 K) with tetraethyl-orthosilicate (TEOS) as the silica precursor. For Bi2O3, nonvolatile bismuth nitrate pentahydrate was dissolved in solvents with Tbp=338–468 K. Product powders were characterized by nitrogen adsorption, X-ray diffraction, and scanning and transmission electron microscopy. From these data as well as from the literature of FSP synthesis of Bi2O3, CeO2, MgO, ZnO, Fe2O3, Y2O3, Al2O3, and Mg–Al spinel, it is inferred that hollow/inhomogeneous particles are formed at low combustion enthalpy densities and when the solvent boiling point is comparable or smaller than the precursor melting or decomposition point.