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Recent advances in theoretical methods combined with the advent of massively parallel supercomputers allow one to reliably simulate the properties of complex materials and device structures from first principles. We describe applications in two general areas: i) novel polymer composites for ultra-high-density capacitors, necessary for pulsed-power applications, such as electric rail guns, power conditioning,...
In recent years, combining a ferroelectric ceramic and a polymer matrix to form a flexible composite with coupling properties in between that of two individual phases has been pursued for sensors in medical applications and hydrophones. For hydrophone applications, a useful piezoelectric material should have high piezoelectric voltage coefficient (g33), piezoelectric strain coefficient (d33) and high...
A new nanocrystalline TiO2-polymer composite with high volume particle loading has been developed for matching layers of ultra high frequency medical ultrasonic transducers. The composite consists of 25 nm size TiO2 particles and epoxy resin with the acoustic impedance reaching as high as 7.19 MRayls. Ultrasonic spectroscopy methods are used to measure the ultrasonic velocity of the composite thin...
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