Properties of aurivillius phases in the Bi4Ti3O12-BiFeO3 system

Abstract

A number of new Bi m +1 Fe m −3 TiO 3 m +3 compounds with integer and fractional m values are identified in the Bi 4 Ti 3 O 12 -BiFeO 3 system. All of the compounds are shown to have Aurivillius-type structures. The phase-transition and decomposition temperatures of the new and earlier known compounds of the Bi 4 Ti 3 O 12 -BiFeO 3 system are determined. The linear thermal expansion coefficients of the synthesized compounds are evaluated using dilatometry, and their sintering onset temperatures are determined.