Nanocomposite powders of montmorillonite and cerium oxide are synthesized using an electrochemical technique. X-ray diffraction of the nanocomposites shows a random orientation of the powders with particle sizes as small as 4-6 nm. The montmorillonite percentage in the nanocomposite is also shown to affect sintering rates and particle size growth as shown by X-ray diffraction. Fourier transmission infrared measurements confirm the presence of individual platelets of the montmorillonite within the nanocomposite matrix. Nanocomposites containing 1% of the montmorillonite in the matrix increase crystallization, while higher percentages of montmorillonite inhibit particle growth during sintering. (C) 2008 Elsevier B.V. All rights reserved.