Effects of the chelating agent on the fabrication of SBT thin films: Part I. Stoichiometry and crystallization behavior

STACHIOTTI, MARCELO; R.MACHADO; A. FRATTINI; N. PELLEGRI; O. DE SANCTIS

FERROELECTRICS

Taylor & Francis

Lugar: Philadelphia; Año: 2006 vol. 335 p. 23 - 33

0015-0193

The effects of the chelating agent on the thermal evolution of SrBi2Ta2O9 precursor powders were investigated. The precursor solutions were prepared from non-hydrolyzing precursors of bismuth and strontium and a tantalum alkoxide.  The utilization of alkanolamines as chelating agent was found to produce the segregation of metallic bismuth in the as-prepared powders, which led to the formation of a multiphase system. On the other hand, acetoin, one of the Hydroxyketones, showed outstanding characteristics for the low-temperature synthesis of SrBi2Ta2O9: elimination of residual organics at low temperature, an earlier onset of crystallization, and no segregation of secondary phases during the whole crystallization process.