Synthesis and investigation of RE(III) cation substituted SBN and SBT ceramics

ABSTRACT

Physico-chemical, structural and electric properties of Aurivillius phases SrBi_2-xSm_xNb₂O₉ and SrBi_2-ySm_yTa₂O₉ with x = 0.0 and 0.4 obtained in muffle and microwave furnace have been investigated by the X-ray diffraction, DTA, FTIR-spectroscopy and dielectric spectroscopy methods. The perovskite-like structure of solid solutions obtained is characterized by the orthorhombic symmetry. The assumption about the non-statistical distribution of Sm(III) cations crystal structure of Aurivillius phases was made according to the obtained results. It has been found that Sm(III) cations introduction does not influence on T_C of SrBi_2-xSm_xNb₂O₉ solid solutions.

KEYWORDS:

• Aurivillius phases
• SBN
• SBT
• ferroelectric phase transition

Funding

The work was supported by the Russian Fund for Basic Research (Grant 16–03-00782A).