Size Effect for Ba(Zr_xTi_{1 − x})O₃ (x = 0.05) Nano-Particles

This paper focuses on the size effect for barium zirconate titanate (BZT) prepared by a sol-gel method. BZT particles with different crystal sizes were prepared by carefully controlling the annealing temperatures and times of the alkoxide-derived precursor particles. Particle size was calculated from the XRD patterns using Scherrer's equation. The change in the Curie temperature was estimated by XRD pattern measured at different temperatures, and the intrinsic dielectric permittivity for BZT nano-particles were calculated from the phonon mode frequencies using the Lyddane-Sachs-Teller (LST) relation.

Keywords:

• Barium zirconate titanate
• size effect
• Raman scattering
• phase transition

Acknowledgments

Paper originally presented at IMF-11, Iguassu Falls, Brazil, September 5–9, 2005; received for publication January 26, 2006.