Excellent dielectric properties of Polyvinylidene fluoride composites based on sandwich structured MnO2/graphene nanosheets/MnO2

Enhanced thermal conductivity and dielectric properties of Al/β-SiCw/PVDF composites

“…Recently, the surface self-passivated micro or nanometer aluminum particles (Al) was chosen to fabricate the core-shell structured Al (Al@Al 2 O 3 )/polymer composites with an improved thermal conductivity and relatively high permittivity but low dielectric loss [2,17,23,[31][32][33][34]. However, there is much room for improvement in the dielectric constant and thermal conductivity of the composites.…”

“…Recently, the conductor-insulator core-shell structured particle has been employed to prepare polymeric composites with high dielectric constant and low loss. The metal core is used to increase the dielectric constant due to the interfacial polarization (namely, MWS effect), and the insulator shell serves as a barrier layer to control the dielectric loss efficiently through blocking the electron transfer between adjacent metal cores [2,17,23,[31][32][33][34]. Additionally, it is essentially crucial for the heat generated from electronics to be dissipated as quickly and effectively as possible, to maintain the operating temperatures of the electronic equipment at a desired level because the dielectric strength will decrease with increasing temperature owing to a poor thermal conduction of these dielectric materials [35,36].…”

“…As a kind of passive components, the embedded capacitors are of great importance for a range of applications in modern electronic systems such as kinetic weapons, electromagnetic armor, and high power microwaves, etc [1][2][3][4][5][6]. Compared with other energy storage devices, embedded capacitors possess high power density and attract special attentions due to the variety of functions including fast charge storage and discharge [7], decoupling, and by-passing as well as their capability to enhance the electrical performance and to reduce the size and cost of an electronic system [8][9].…”

“…One classic approach is to introduce either high dielectric constant ceramic particles (i.e., Barium titanate, Cadmium oxide, Tungstic oxide) [6,10,[11][12][13][14][15][16] or high electric conductivity particles such as metal (i.e., Aurum, Silver, Copper, Aluminum) [2,[17][18][19][20][21][22][23] and carbon fillers [24][25][26][27][28][29][30] into a polymer. To date, two technical routes have been developed to achieve high dielectric constants polymer composites, i.e., the preparation of percolative composites and ceramic/polymer composites [5].…”

Hierarchical electromagnetic absorption in micro-waveguide stuffed with magnetic media for resin-based composites of graphene nanosheets and manganese oxides

“…Numerous works can be attributed to the design of integrating the contribution from electric and magnetic synergistic effect in absorption [1,2,11]. So far, the applied materials in microwave absorbing contain barium titanate [12], cobalt ferrite [13], iron, iron compounds, and other iron/manganese oxides [7,14,15]. The electric conductive components are multi-walled carbon nanotubes [8], carbon black [10], active carbon-carbon fibers [16] and graphene materials [14].…”