Particle size dependent high frequency dielectric properties of barium titanate

Author

McNeal, Mark P. ; Jang, Sei-Joo ; Newnham, Robert E.

Author_Institution

Intercollege Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA

Volume

2

fYear

1996

fDate

18-21 Aug 1996

Firstpage

837

Abstract

Dielectric measurements on BaTiO₃ ceramics and BaTiO ₃ powder-polypropylene composites were carried out through microwave frequencies using various techniques. Ceramic BaTiO₃ exhibited a large relaxation with a peak in the loss occurring at 776 MHz. Dielectric dispersion was also evident in the composites fabricated with ~1 μm TAM HPB BaTiO₃ powder, which exhibited a peak in loss at 1.58 GHz. Composites fabricated with ~0.1 μm Cabot BT-8 hydrothermal powder, showed a broad relaxation over the measured frequency range. The reduction in particle size and subsequent modulation of the domain structure has been attributed to the shift in the relaxation frequency

Keywords

barium compounds; dielectric losses; dielectric relaxation; electric domains; ferroelectric materials; filled polymers; particle size; permittivity; piezoceramics; powder technology; 0.1 mum; 1 mum; 1.58 GHz; 10 kHz to 5.6 GHz; 776 MHz; BaTiO₃; BaTiO₃ ceramics; BaTiO₃ powder-polypropylene composites; Cabot BT-8 hydrothermal powder; TAM HPB BaTiO₃ powder; dielectric constant; dielectric dispersion; dielectric relaxation; domain structure modulation; loss peak; microwave frequencies; particle size dependent high frequency dielectric properties; relaxation frequency shift; Barium; Ceramics; Dielectric losses; Dielectric materials; Dielectric measurements; Frequency; Polymers; Powders; Resonance; Titanium compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on

Conference_Location

East Brunswick, NJ

Print_ISBN

0-7803-3355-1

Type

conf

DOI

10.1109/ISAF.1996.598154

Filename

598154