BSN — Ceramics — Advanced radar-absorbing material

Composite Nanomaterials for Implementation of Promising Memristive Structures

“…Parasitic leakage of microcurrents through the insulating layer is also possible. Applying a negative voltage to a conductive layer applied to an insulating layer results in an electric field that prevents parasitic leaks, as well as a shift of oxygen vacancies to the center of the core, where the nanostructure is more uniform due to the absence of edge effects [13][14][15]. Thus, when an electric field is applied from a voltage source between the electrodes of the memristive cell, the drift of oxygen vacancies along the direction from one electrode to another for nanometer distances occurs in the active layer due to displacement of the boundary of the location of oxygen vacancies, which leads to a change in the resistance of the memristive cell, and the electric field effect from the electrode applied to the insulating layer compresses the conduction region to the center of the core, where the uniformity of the core composition is higher, which increases stability and repeatability of memristive cell characteristics [16,17].…”

“…Analysis of alternative materials for creating a resistive memristor layer showed the possibility of using the following materials [4][5][6][7][8][9][10][11][12][13][14][15][16][17]: single-crystal magnetite, conductive polymers, etc. However, memristors made on basis of such materials are produced by uncharacteristic methods for modern technology.…”

“…It follows that the use of these materials is not rational for production. For this reason, the most often used structure is 'metal-insulator-metal', which in turn is easily integrated into semiconductor technology [4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Polymer matrix composites as broadband radar absorbing structures for stealth aircrafts

“…Though many articles are available on the successful RAS realization research programs across the world, all of them are mainly focused on using radar absorbing materials (RAMs) as fillers, such as carbonaceous materials like carbon black, multiwall carbon nanotubes (MWCNTs), short carbon fibers (SCFs), and so on, graphene, ferrites, magnetic material-coated conducting materials, high permittivity materials, and many more to add primarily in narrow bandwidths. [14][15][16][17][18][19][20][21][22][23][24][25][26][27] For example Chen et al 28 have explored the 3D flakes of Bi 2 Te 3, a semiconducting material as radar absorbing filler materials. Being 3D flake morphology, it has huge planes for reflections in addition to its inherent strong interfacial polarization, enables flakes of Bi 2 Te 3 for high reflection loss.…”