Effect of Barium Titanate Particle Size on Electrical Properties of 0–3 Barium Titanate-Portland Cement Composites

Abstract

In this paper, the effects of barium titanate particle size on the dielectric, ferroelectric and piezoelectric properties of barium titanate (BT)–Portland cement (PC) composites were investigated. BT of various median particle sizes (75–425 μm) were used at 50% by volume to produce the composites. The results show that the dielectric constant (ϵ _r ) at room temperature of BT–PC composites were found to be increased with increasing BT particle size and that the highest value for ϵ _r of 309 was obtained when BT of 425 μm size was used. The ferroelectric hysteresis loops of composite materials indicate that the “apparent” remnant polarization of these composites increase as the BT particle size increases. Furthermore, the piezoelectric coefficient was also found to increase as BT particle size increases.

Keywords:

• BT
• particle size
• cement
• composites
• electrical properties

Acknowledgments

The authors wish to thank the staff members at the Electroceramics Research Laboratory, Faculty of Science, Chiang Mai University, for use of the research facilities which made this work possible.