Dielectric and Ferroelectric Properties of Ba(Ti_0.82Sn_0.18)O₃ Ceramics Prepared by Two-Steps Sintering

Abstract

The method of two-steps sintering was applied to Ba(Ti_0.82Sn_0.18)O₃ ceramics to improve their electrical properties. The ceramics were sintered at T₁(1350°C) with a short time, followed by firing at T₂ (1100°C) for 4–16 h. Effects of dwell time at T₂ on the properties of the ceramics were investigated. The examination of dielectric spectra indicates that the ceramics exhibited a relaxor behavior. An improvement in density and dielectric constant at the transition temperature of the ceramics were observed for a longer dwell time. The dielectric behavior was confirmed by the ferroelectric behavior of the samples.

Keywords:

• Phase transition
• dielectric properties
• diffuseness parameter

Acknowledgments

This study was financially supported by The Thailand Research Fund (TRF) and Office of the Higher Education Commission (OHEC) Thailand. Thanks also to Faculty of Science and Technology Chiang Mai Rajabhat University for supporting facilities, and Faculty of Science Chiang Mai University.