Journal of Advanced Dielectrics, Volume. 11, Issue 5, 2160016(2021)
Crystal structure and dielectric properties of layered perovskite-like solid solutions Bi TiTaO9 (x = 0.0, 0.1, 0.2, 0.3) with high Curie temperature
S. V. Zubkov1,2、*
Author Affiliations
1Research Institute of Physics, Southern Federal University, pr. Stachki 194, Rostov-on Don 344090, Russia2Department “International”, Don State Technical University, 1, pr. Gagarina, Rostov-on Don 344003, Russiashow less
The Aurivillius phases [Bi2O2][AO] are well-known ferroelectrics with high Curie temperatures . High-temperature piezoceramics BiTiTaO9 (BGdTTa, = 0.0, 0.1, 0.2, 0.3) were prepared by a solid-state reaction method. The structural and electrophysical characteristics of BGdTTa ceramics have been studied. According to the data of powder X-ray diffraction, all the compounds are single-phase with the structures of two-layer Aurivillius phases ( = 2) with the orthorhombic crystal lattice (space group A21am). The temperature dependence of the relative permittivity / ( of the compounds was measured and showed that the Curie temperature of perovskite-like oxides BiTiTaO9 increases linearly with an increase in the substitution parameter to = 925C. The activation energies of charge carriers have been found in different temperature ranges.The Aurivillius phases [Bi2O2][AO] are well-known ferroelectrics with high Curie temperatures . High-temperature piezoceramics BiTiTaO9 (BGdTTa, = 0.0, 0.1, 0.2, 0.3) were prepared by a solid-state reaction method. The structural and electrophysical characteristics of BGdTTa ceramics have been studied. According to the data of powder X-ray diffraction, all the compounds are single-phase with the structures of two-layer Aurivillius phases ( = 2) with the orthorhombic crystal lattice (space group A21am). The temperature dependence of the relative permittivity / ( of the compounds was measured and showed that the Curie temperature of perovskite-like oxides BiTiTaO9 increases linearly with an increase in the substitution parameter to = 925C. The activation energies of charge carriers have been found in different temperature ranges.