Investigation of microstructure, ferroelectric and dielectric behavior of CaCu3Ti(4−x)Mn xO12 perovskites synthesized through semi-wet route

Abstract

The Mn-doped CCTO (CaCu3Ti(4−x)MnxO12 system x = 0.25, 0.50 and 1.00) ceramic has been synthesized by using metal nitrates and solid TiO2 powder sintered at 1223 K for 8 h. The crystal phase of CCTMO was confirmed by the XRD at 1223 K for 8 h. The phase-structure, as well as microstructure, was examined by XRD and SEM, respectively. The SEM micrograph revealed the effect of Mn concentration on grain size and grain formation. The bright-field TEM image of the system confirmed the particle size in the range of 22–30 nm. The stoichiometry and purity of synthesized material were observed by EDX. The investigated dielectric permittivity and tangent loss were found to be 150 and 0.6, respectively, at room temperature (10 kHz), which may be used in electronic devices. © 2019, Springer Nature Switzerland AG.