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Effect of dehydroxylation of hydrothermal barium titanate on dielectric properties in polystyrene composite
Author(s) -
Badheka Prerak,
Magadala Venkat,
Devaraju Naga Gopi,
Lee Burtrand I.,
Kim Eung Soo
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.22890
Subject(s) - dielectric , barium titanate , materials science , composite material , composite number , polystyrene , ceramic , capacitor , dielectric loss , high κ dielectric , permittivity , polymer , optoelectronics , quantum mechanics , voltage , physics
In today's world, technology for capacitors has grown significantly with its requirements in the direction of better dielectric properties. Developing an ideal composite material (polymer and ceramic) for satisfying the processing parameters is of great interest for capacitor industry. In this study, chemically treated barium titanate (BT) nanocrystals were prepared and used to make ceramic–polystyrene (PS) composites. A unique methodology was used in processing these materials. Effects of the chemically treated BT, filler loading, and frequency on the dielectric properties of these composites were examined, and compared with untreated BT–PS composites. Composite dielectric constant was proportional to the volume ratio of the BT filler and remained stable at different frequencies. The experimental data show that the dielectric constant of composites made with treated BT powders can attain values 2.5 times higher than that of untreated BT–PS composites. In addition, the composite shows consistency in dielectric constant values measured at different frequencies. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci, 2006