Thermophoresis-assisted vapour phase synthesis of CeO2 and CexY1-xO2-deltananoparticles

Thermophoresis-assisted chemical vapour deposition (CVD) was used to produc e nano-sized particles of ceria and yttria-doped ceria. The solid precursor s cerium trichloride and yttrium trichloride were used with oxygen. After h omogeneous nucleation, condensation and coagulation, thermophoresis-assiste d particle collection was achieved in two different ways. Particle dimensio ns were studied by transmission electron microscopy (TEM) and X-ray diffrac tion (XRD)-line broadening. Crystallite and particle dimensions varied from 9 to 30 nm and from 30 to 80 nm, respectively. The influence of process co nditions is discussed. (C) 1999 Published by Elsevier Science B.V. All righ ts reserved.