Preparation and characterization of Bi5FeTi3O15 Aurivillius phase and Sr-doped ceramics

Layered perovskite-like oxides with the Aurivillius phase’s structure are promising for high-technology industries such as magnetoelectronics, photonics, and catalysis. This work reports the synthesis condition and magnetic properties of the Sr-doped ceramic materials (BSFTO) based on four-layer Aurivillius phase Bi5FeTi3O15. (Bi1−xSrx)5FeTi3O15−δ (x = 0–0.14) ceramics were synthesized by a solid-state reaction method, and their structure (XRD), morphology (SEM, helium pycnometry), elemental composition (EDX), and sintering (dilatometry) were investigated. The XRD/EDX measurements show that the single-phase materials based on BSFTO solid solutions were synthesized with x = 0.0–0.1, which corresponds to the content of strontium 0–50 mol.%. The optimal synthesis regimes of the obtained materials and their sintering temperatures were determined. At x < 0.1, field dependent magnetization indicates a possible low-temperature magnetic ordering, and they have nonzero magnetization at RT. The results of the present work confirm the possibility of successful synthesis of pure-phase BSFTO materials that can have promising functional applications. © 2023, The Author(s) under exclusive licence to Australian Ceramic Society.