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Particle size dependent high frequency dielectric properties of barium titanate

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3 Author(s)
McNeal, Mark P. ; Intercollege Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA ; Sei-Joo Jang ; Newnham, Robert E.

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

Published in:

Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on  (Volume:2 )

Date of Conference:

18-21 Aug 1996