A-site substitution-controlled dielectric dispersion in lead-free sodium bismuth titanate

Pramana

M Raghavender¹  G S Kumar¹  G Prasad1¹ 

[1] Materials Research Laboratory, Department of Physics, Osmania University, Hyderabad 500 007, India$$

关键词: Na0.5Bi0.5TiO3;    lead-free ferroelectrics;    dielectric dispersion;    impedance;    relaxation times.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Effect of doping in Na0.5Bi0.5TiO3 (NBT) with Ce3+ and Sm3+ at the A-site on dielectric behaviour, impedance and conductivity is being reported. Na0.5Bi0.5−𝑥𝐴𝑥TiO3 samples (A being Ce and Sm) are studied with varying values of 𝑥. For Na0.5Bi0.5−𝑥Ce𝑥TiO3 samples 𝑥 is 0.001, 0.005 and 0.007 and for Na0.5Bi0.5−𝑥Sm𝑥TiO3 samples 𝑥 is 0.05, 0.1 and 0.15. Dielectric constant and loss are studied in the frequency range 10 kHz to 1 MHz and in the temperature range 30–650°C. Impedance and electric modulus studies are undertaken. The relaxations observed in the samples are non-Debye and activation energies for relaxation and conduction are evaluated.

【 授权许可】

Unknown