Dielectric and ferroelectric properties of Lanthanum modified SrBi4Ti4O15 ceramics

• Structural analysis by X-ray diffraction and Raman spectroscopy of La doped SBT ceramic.
• Decrement in dielectric constant and transition temperature with La doping.
• Decrement in dielectric loss and increase of diffuseness with La doping.
• Improvement in ferroelectric and piezoelectric properties with doping.

Structural and electrical properties of Lanthanum substituted Strontium Bismuth Titanate SrBi4−xLaxTi4O15 (0≤x≤0.1) ceramics have been investigated. The X-ray diffraction pattern and Raman spectra indicate that all the compositions are of single phase. A decrement in the grain size is observed with La-content. The temperature dependent dielectric study shows decrease in dielectric constant and increases in the diffuseness with the increase in Lanthanum substitution. The ferroelectric and piezoelectric properties enhance with an increase in Lanthanum concentration.