Synthesis and characterization of SrBi2Ta2O9 powders for ferroelectric applications

authors	Aguilar, GG; Costa, MEV
nationality	International
journal	FERROELECTRICS
author keywords	SrBi2Ta2O9; ferroelectrics; chemical synthesis; perovskite powders
keywords	SOL-GEL METHOD; THIN-FILMS; SRBI2NB2O9; CERAMICS; OXIDES; ROUTE; BI
abstract	SrBi2Ta2O9 (SBT) is a bismuth-layered perovskite that finds application as thin film for nonvolatile random-access memories and as high temperature ceramic transducer. The synthesis of SBT by the solid-state reaction requires high temperatures (Tsimilar to1000degreesC), at which bismuth losses are significant, leading to non-stoichiometric compositions with decreased properties. To overcome this drawback, lower temperature reactions of organic precursors have been reported for the production of this oxide. This work describes a novel method to obtain SBT powders that uses Ta2O5 as starting reagent. The thermal behaviour of the SBT precursor gel obtained by this new method is compared to other SBT precursors: those produced by a sol-gel method starting from alkoxides reagents and those related to conventional solid-state reaction. The new method combines the advantage of using reagents that are less toxic and less expensive than alkoxides with the possibility of producing SBT at lower temperatures than those required by the conventional route.
publisher	TAYLOR & FRANCIS LTD
issn	0015-0193
year published	2003
volume	294
beginning page	211
ending page	220
digital object identifier (doi)	10.1080/00150190390238900
web of science category	Materials Science, Multidisciplinary; Physics, Condensed Matter
subject category	Materials Science; Physics
unique article identifier	WOS:000186527000022