Finite size effects in a BaTiO₃ ferroelectric glass ceramic

Abstract

A series of BaTiO₃ glass ceramics were synthesized to produce dispersed nanometer sized crystals grown in a residual glass matrix. Structure property relations are made between the crystallite size distribution and the dielectric temperature dependence of the ceramics. The phase transition temperature, dielectric anomaly broadening and peak dielectric constant all scale systematically with the mean size of the BaTiO₃ crystals. These results are discussed in relation to other size effect studies performed on ferroelectric materials.

Key Words:

• BaTiO₃
• nanometer
• glass ceramics
• polarization