Phys.org February 27, 2020 Barium ferrites are particularly interesting because they have unique functional properties. Researchers in Russia have created barium hexaferrite with various degrees of aluminum doping as their crystal structure allows to vary the properties of the material in the ranges needed for a particular device. They are studying the properties of the material in the frequency range of 32-50 GHz. It allows increasing the frequency range used in the production of electronic devices. Using powder form of the material they have shown that increases electronic device operational stability and reduces the cost of sintering. It can be […]
Tag Archives: S&T Russia
Russian scientists found an effective way to obtain fuel for hydrogen engines
EurekAlert February 20, 2020 Catalysts used for releasing hydrogen from an H2O molecule are made from platinum, or molybdenum which are expensive hence the output energy is expensive too. Researchers in Russia used thin films of molybdenum sulfide deposited on the surface of glassy carbon instead. In this case, the material consumption will be minimal, and the surface area of the catalyst will be the same as if it was completely made from molybdenum sulfide. They measured electrochemical characteristics which indicated that the differences in the achievable hydrogen evolution reactions performances of the films could be caused by their unique […]
Physicists find ways to overcome signal loss in magnonic circuits
Nanowerk January 2, 2020 Researchers in Russia analytically investigated properties of magnetostatic surface spin wave propagation in irregular narrow ferromagnetic waveguides that are important elements of magnonic logic. They demonstrated that the confinement effect in the narrow waveguide leads to multimode regime propagation, wave beats, and energy redistribution. These processes can be controlled by tuning the structure and excitation parameters. A gradual change in the waveguide width can be used to vary the spin wave energy density. Our results show that the impact of the width effect and the irregularity of the waveguide on the spin wave propagation are crucial. […]
Russian Air Force Begins Testing MALE Strike Drones
Defense Systems November 2, 2019 The user testing follows the manufacturer test phase and state trials culminated with weapons tests with several drones deployed to Syria. Following those tests, the Ministry of Defense is expected to make the final procurement decision. In the strike-reconnaissance configuration, Orion-E can carry four missiles. The Russian Air Force plans to deploy MALE drones in a mixed formation of manned and unmanned reconnaissance and attack platforms. These are expected to use MALE drones such as long loitering but slow Orion, and fast, long-range strike aircraft such as the S-34…read more.
Explosion Confirmed at Russian Lab Storing Smallpox, Ebola
Global Biodefense September 21, 2019 One worker was hospitalized after a gas explosion on Sep. 16 caused a fire to break out at the Russian biological research facility in the Siberian city of Koltsovo. According to news coverage and the World Health Organization, the explosion did not occur near any storage areas of smallpox or other virus stockpiles; they remain intact and secure. The State Research Centre on Virology and Biotechnology, known as Vector, is the only center in the world other than the U.S. Centers for Disease Control and Prevention approved and known to have live samples of the […]
Scientists develop filter to suppress radio interference
Phys.org August 6, 2019 To reduce the level of interference, devices that carry out the frequency filtering of radio noise are used. Researchers in Russia have designed a miniature stripline resonator on a substrate with a double-sided pattern of strip conductors. The design demonstrates the unique steepness of the slopes of the pass band and the ultra-wide high-frequency stop band, which reaches 100 dB in frequency (attenuation power decay is 10 orders of magnitude) up to a frequency five times the center frequency of the pass band. As several oscillation modes are used in the cavity as working, they managed […]
Laser solitons: Theory, topology and potential applications
Science Daily July 31, 2019 Solitons have found applications in data transmission but even these gradually dissipate unless the medium they travel through has ultra-low absorbance. In computer simulations researchers in Russia found that suggesting that it was theoretically possible to produce a stable soliton in a wide-aperture laser if it was stabilised by external radiation. Beginning from geometrically one-dimensional and turning to two-dimensional and then to three-dimensional solitons they demonstrated the evolution of the features. When the remaining questions are answered, the stability of these solitons and their topology suggest potential applications in storing digital information…read more. TECHNICAL ARTICLE
Scientists create new aluminum alloy with flexibility, strength, lightness
Phys.org May 27, 2019 At present aluminum is reinforced mainly with the help of nanopowders, but this is an extremely expensive and time-consuming process. Researchers in Russia have demonstrated that if a melting technique is used, after Al-Ni-La crystallization, the diameter of doping particle does not exceed 30-70 nanometers. Due to natural crystallization, particles are distributed uniformly, forming a reinforcing structure. Hence, the composite becomes stronger and more flexible than its powder analogues. The important feature of the new development is the high reinforcing ability of the chemical compounds with ultrafine structure: the diameter of the reinforcing elements does not […]
Physicists propose perfect material for lasers
Eurekalert May 8, 2019 In Weyl semimetals charge carriers behave the way electrons and positrons do in particle accelerators. Researchers in Russia have shown that reactions forbidden for elementary particles can also be forbidden in the crystalline materials known as Weyl semimetals. Specifically, this applies to the forbidden reaction of mutual particle-antiparticle annihilation without light emission. This property suggests that a Weyl semimetal could be the perfect gain medium for lasers. The team gauged the lifetime of an electron-hole pair in a Weyl semimetal to be about 10 nanoseconds which is much longer than in conventional materials used in laser […]
Russian Army Has New Body Armor and Promise Combat Exoskeletons
Next Big Future March 11, 2019 Russia is promising to develop Ratnik-3 which would be advanced combat exoskeletons, UAVs and combat robots. They are displaying mockups of advanced guns, new helmets and more complete body armor. The main problem for real exoskeletons that boost the weight that a soldier can carry or provide real force multipliers is the batteries and power systems for the gear. US has also been developing combat exoskeletons. Russia and the USA have had small field tests of some exoskeleton systems. US military research has admitted that it will still be 5-10 years or more before […]