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High Dielectric Permittivity (high + dielectric_permittivity)

Distribution by Scientific Domains
Polymers and Materials Science100%

Selected Abstracts

Potential Bioelectroactive Bone Regeneration Polymer Nanocomposites with High Dielectric Permittivity,

ADVANCED ENGINEERING MATERIALS, Issue 10 2009
Zhi-Min Dang
The frequency dependence of the dielectric permittivity of (barium titanate,hydroxyapatite)/poly(vinylidene fluoride) three-phase nanocomposites is investigated at room temperature and different fractions of barium titanate. The permittivity increases with increasing concentration of barium titanate. A weak decrease in permittivity is also observed for frequencies below 106 Hz. The SEM image inset in a dielectric permittivity vs. frequency curve shows that rod-like hydroxyapatite and sphere-like barium titanate nanoparticles exist in the three-phase nanocomposites. [source]

Advanced Calcium Copper Titanate/Polyimide Functional Hybrid Films with High Dielectric Permittivity

ADVANCED MATERIALS, Issue 20 2009
Zhi-Min Dang
A functional hybrid film with high dielectric permittivity and good thermal stability is obtained using calcium copper titanate as filler in a polyimide polymer matrix. The giant dielectric permittivity of the filler and its semiconducting characteristics impart good dielectric properties to the hybrid films. A dielectric permittivity high as 49 is achieved at a 40,vol% filler concentration at 102,Hz. [source]

High Dielectric Permittivity and Low Percolation Threshold in Nanocomposites Based on Poly(vinylidene fluoride) and Exfoliated Graphite Nanoplates

ADVANCED MATERIALS, Issue 6 2009
Fuan He
A novel nanocomposite, based on poly-(vinylidene fluoride) and exfoliated graphite nanoplates (PVDF/xGnPs), exhibits high dielectric constant with a low percolation threshold, which can be attributed to the good dispersion of xGnP in the PVDF matrix and the formation of a large number of parallel-board microcapacitors. [source]

Advanced Calcium Copper Titanate/Polyimide Functional Hybrid Films with High Dielectric Permittivity

ADVANCED MATERIALS, Issue 20 2009
Zhi-Min Dang
A functional hybrid film with high dielectric permittivity and good thermal stability is obtained using calcium copper titanate as filler in a polyimide polymer matrix. The giant dielectric permittivity of the filler and its semiconducting characteristics impart good dielectric properties to the hybrid films. A dielectric permittivity high as 49 is achieved at a 40,vol% filler concentration at 102,Hz. [source]