Dielectric Behavior of Nano Barium Titanate Filled Polymeric Composites

Abstract

Rapid growth of electronic industry requires development of new materials that combine the high dielectric constant intrinsic to ferroelectric ceramic materials with easy processing characteristics of polymers. Ceramic-polymeric composites possess interesting properties for a variety of electronic applications including passive electronic devices. In fact, polymer-ceramic materials have drawn lot attention for use in microelectronic packaging, because they can give higher performance with lower cost, size and weight. In this work, attempts are made to prepare ceramic polymer composites followed by characterization of dielectric properties. The Barium Titanate ceramic powders are synthesized using the hydrothermal process. Crystal structure and crystallite size of particles are determined using X-ray diffraction. Silane treatment is carried out on Barium Titanate powder to increase its compatibility with polymer, followed with preparation of ceramic polymer composites. Epoxy and polyvinyledene fluoride (PVDF) polymers are used as matrices for preparation of the composites. The proportion of nanopowder is varied from 60 to 90 wt%. Dielectric properties such as volume resistivity, dielectric constant, dissipation factor are evaluated. Results indicate that the dielectric constant and dissipation factor vary between 18 -140 and 0.01 to 0.09, respectively as the relative ratio of polymer and silane modified Barium Titanate is varied. Specifically, at 90 wt% of 0.1 wt% silane modified Barium Titanate, the highest dielectric constant of 140 along with dissipation factor of 0.07 is obtained in the epoxy based system.

Dielectric studies and AC conductivity of piezoelectric barium titanate ceramic polymer composites

“…4 These composites have good mechanical properties with easy processing and can be formed into any shape through simple molding process, which can be used for various electrical and electronic applications. 5 BT/PVA composite can serve as a good dielectric in capacitor applications and as an active component in ultrasonic transducers.…”

Influence of B-Site Gd+3 Substitution on Various Properties of Co-Ferrite Nanoparticles

“…The variation in the dielectric loss with increasing Gd 3+ concentrations at low frequencies could be due to hindrance in the electronic exchange between Co + 2 /Fe + 3 and Fe + 2 /Fe + 3 [69-75]. At higher frequencies, the dielectric loss decreases drastically which may allow these materials to nd their applications in highfrequency devices [76][77][78][79].…”

Advances in polymeric nanocomposites for automotive applications: A review

“…In PNCs, different nanofillers or nanocomponents, or other nanoscale particles are integrated and distributed in a matrix of the polymer. These composites could be synthesized by implementing the nanometer‐size clay particles in polymers like polypropylene (PP), polyethylene (PE), polyesters, and epoxides 11–13 . These materials are incorporated into the polymer through dispersed or exfoliated by using the traditional melt compounding or solution process.…”

“…These composites could be synthesized by implementing the nanometer-size clay particles in polymers like polypropylene (PP), polyethylene (PE), polyesters, and epoxides. [11][12][13] These materials are incorporated into the polymer through dispersed or exfoliated by using the traditional melt compounding or solution process. Moreover, these composites can also be produced through the in-situ intercalated polymerization process, in which initially, the monomer is intercalated into the clay before being polymerized in situ.…”