Abstract
The effects of the chelating agent on the thermal evolution of SrBi 2 Ta 2 O 9 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 SrBi 2 Ta 2 O 9 : elimination of residual organics at low temperature, an earlier onset of crystallization, and no segregation of secondary phases during the whole crystallization process.
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