Barium Titanate via Thermal Decomposition of Ba,Tiprecursor Complexes: The Nature of the Intermediate Phases

Authors: Roberto Koferstein, Vladislav Ischenko, Eckhard Pippel, Hans-Peter Abicht, Jörg Woltersdorf | Natural & Applied Sciences Material Science Research 7 pages 3,595 words

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Solid State Sciences 9 (2007) 21, doi:10.1016/j.solidstatesciences.2006.09.004,

Abstract::

The thermal decomposition of Ba,Ti-precursor complexes, containing organic ligands and suitable for the single-source preparation of nanocrystalline BaTiO3, leads firstly to the segregation of specific Ba-rich and Ti-rich phases. Quantitative electron energy loss
spectroscopy and powder X-ray diffraction data indicated that the (i) Ba-rich phase is a BaOstabilised variant of the calcite-type high temperature modification of BaCO3 and (ii) Ti-rich phases are represented by low crystalline barium titanates with the general Ba:Ti ratio close to 1:4. The subsequent solid state reaction between these phases results then in the formation of BaTiO3.

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