Structure and dielectric properties of Bi1-xLaxFeO3 nanostructured ceramics

Nanostructured ceramic samples of the composition Bi1-xLaxFeO3 (BLFO) at x = 0, 0.05, 0.10, 0.15, and 0.2 (BFO-0, BLFO-5, BLFO-10, BLFO-15, and BLFO-20) were produced from nanopowders by spark plasma sintering. The structure and dielectric properties of BLFO ceramics were studied in a wide range of temperatures and frequencies. Phase analysis showed that the BFO-0 sample contained less than 5% impurity phases, decreasing to zero at 5% doping with La. The temperature dependences of the dielectric permittivity epsilon'(T) revealed a number of anomalies. It has been shown that with an increase in the La concentration, epsilon' increases and tg delta decreases.

Automated summary

The study revealed that with an increase in the La concentration, the dielectric permittivity ε' increases and the tg delta decreases.