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    Wyświetlanie 1-10 z 10
    Tytuł:
    Dense magnetized plasma and its applications: review of the 3-year activity of the IAEA Co-ordinated Research Programme
    Autorzy:
    Gribkov, V.
    Malaquias, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147438.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dense magnetized plasma
    ion beams
    plasma beams
    neutron beams
    X-ray beams
    irradiation
    high energy density
    volumetric interaction
    Opis:
    A review of the results received in the course of fulfillment of the International Atomic Energy Agency Co-ordinated Research Project “Dense Magnetized Plasma” for the last 3 years is presented. Niche of the plasma type within the plasma physics field is outlined. Efforts of the CRP participants concentrated on design and operation of new Dense Magnetized Plasma devices are described. All of them designed for plasma heating and for other applications mainly based on the interaction of radiations generated by the devices with different objects. Materials exploitable, diagnostics of the interaction processes, as well as analytical equipment used by the participants to process the irradiated targets are described. Works developed in the frame of the CRP are covered thermonuclear fusion applications, fundamental plasma physics and material science issues, medicine, biology, and some other spheres. New data on the interaction of the radiations generated in this apparatus with various materials are given. E.g. it was found that the necessary dose producing activation/inactivation of enzymes can be much lower if used at a high-power flux density in comparison with those received with classical sources. All these experiments are discussed in the framework of pulsed radiation chemistry in its perfect sense thereto the criteria are formulated. New foreseen applications of DMP devices mainly based on neutron radiation are proposed and discussed.
    Źródło:
    Nukleonika; 2006, 51, 1; 5-13
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantum Chemical Study of Aminonitrocyclopentanes as Possible High Energy Density Materials (HEDMs)
    Autorzy:
    Bai, J.
    Chi, W. J.
    Li, L. L.
    Yan, T.
    Wen, X. E.
    Li, B. T.
    Wu, H. S.
    Ma, F. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/358101.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    cyclopentane derivatives
    high energy density materials
    impact sensitivity
    quantum chemistry
    DFT
    available free space
    Opis:
    Nitro and amine groups were introduced into the cyclopentane skeleton, and the heats of formation, detonation performance, bond dissociation energies, and impact sensitivity for these aminonitrocyclopentanes were calculated in detail at the B3LYP/6-311G** level. The results show that all of the derivatives have negative heats of formation, which are influenced by the position of the substituent groups. Their stabilities were estimated and analyzed according to their bond dissociation energies and calculated characteristic H50 values. Most of the compounds were found to have a lower impact sensitivity than HMX. Furthermore, the detonation velocities and detonation pressures were predicted via the Kamlet-Jacobs equation. Of all these aminonitrocyclopentanes, E has the best detonation properties (ρ = 2.05 g/cm3, D = 9.11 m/s, P = 39.62 GPa) and can be considered as a candidate high energy density material.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 4; 467-480
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Studies of High-nitrogen-containing Energetic Compounds Based on the s-Tetrazine Unit
    Autorzy:
    Man, T. T.
    Wang, K.
    Zhang, J.G.
    Niu, X. Q.
    Zhang, T. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/358527.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    high-energy-density materials (HEDMs)
    substituted s-tetrazine
    compounds
    electronic properties
    thermodynamic properties
    detonation
    properties
    Opis:
    In order to develop new high-energy-density materials (HEDMs), we have investigated 12 substituted s-tetrazine (TZ) compounds, where s-tetrazine was substituted by amino, amido and related groups. Density functional theory (DFT) was used to predict the optimized geometries, electronic structures, total energy, heats of formation (HOFs) and densities. In addition the detonation properties were evaluated by using the VLW equation of state (EOS). The standard enthalpy of formation, the Gibbs free energy, entropy and equilibrium constants were used to estimate the success of the synthetic substitution reactions, which provided theoretical support for practical work. The bond dissociation energy (BDE) of bond C-R was calculated at each stage of the substitution reaction. The calculated results showed that substitution of amino, amido and their derivatives in the TZ ring enhances the HOF values and is favorable for increasing the thermal stability. The calculated detonation properties indicated that incorporating the above groups into the TZ ring is benefcial for improving the explosive performance. Considering the detonation properties and thermal stability, the 12 derivatives may be regarded as promising candidates as high-energy-density materials (HEDMs).
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 2; 171-189
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aminonitronaphthalenes as Possible High Energy Density Materials
    Autorzy:
    Murawski, R. J.
    Ball, D. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/358002.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    high energy density materials
    aminonitronaphthalenes
    density functional theory calculations
    Opis:
    As part of a series of studies evaluating the thermodynamic properties of new potential high energy materials, a series of calculations was performed on a variety of naphthalene molecules having amino and nitro groups. Calculations on seven aminonitronaphthalene molecules were performed, determining their minimum-energy geometries, vibrational frequencies, and energies. Enthalpies of formation were determined using atomization reactions, and subsequently enthalpies of combustion or decomposition were determined. Specific enthalpies of decomposition ranged from 4.1-4.8 kJ/g, while specific enthalpies of combustion ranged more widely, from 13 to almost 21 kJ/g. Some detonation properties of some of the derivatives rival those of current HEDMs.
    Źródło:
    Central European Journal of Energetic Materials; 2015, 12, 1; 3-12
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detonation Performance of Oxygen-rich Trinitromethylsubstituted Pyrazoles: an in-silico Investigation
    Autorzy:
    Naithani, N.
    George, B. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/358132.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    nitropyrazole
    aminonitropyrazoles
    detonation velocity
    detonation pressure
    density functional theory
    high energy molecules
    Opis:
    A new class of high energy molecules was designed and their detonation properties were evaluated using thermo-chemical parameters obtained from quantum chemical calculations at B3LYP/6-31G(d,p) level. The designed molecules exhibited high density, positive oxygen balance and excellent detonation properties. The impact sensitivity of these molecules, in terms of H50 values, was also evaluated from structural correlations. Among these, 3,4,5-tris(trinitromethyl)1H-pyrazol-1-amine (N13) showed the highest detonation pressure (40.67 GPa) and highest detonation velocity (9.17 km/s), though it exhibited high impact sensitive (H50 = 15 cm). Interestingly, 4,5-dinitro-3-(trinitromethyl)-1H-pyrazol-1-amine (N01) (detonation pressure 39.69 GPa; detonation velocity 9.23 km/s) was found to be an ideal high energy molecule with a near zero oxygen balance. The H50 value of N01 was predicted to be 64 cm, which is higher in magnitude, indicating a lower sensitivity than that of the conventionally used RDX (H50 = 26 cm).
    Źródło:
    Central European Journal of Energetic Materials; 2018, 15, 4; 537-533
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wybrane aspekty tworzenia struktur mieszkaniowych o charakterze miejskim na przykładzie założeń: Wiszące Ogrody i Garnizon w Gdańsku
    Selected Aspects of Creating City-like Residential Structures, on Two Case Studies from Gdańsk: Wiszące Ogrody and Garnizon
    Autorzy:
    Woyciechowski, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/2021240.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    City-like residential and mixed use structures
    energy impact
    high density developments
    public space quality
    residential quarters
    sheared use
    Źródło:
    Studia komitetu przestrzennego zagospodarowania kraju PAN; 2018, 187; 228-244
    0079-3507
    Pojawia się w:
    Studia komitetu przestrzennego zagospodarowania kraju PAN
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bezemisyjny ciągnik podwieszany GAD-1 o napędzie akumulatorowym
    No emissions GAD-1 suspended locomotive with electric drive
    Autorzy:
    Niedziela, Bogusław
    Kasperek, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1841102.pdf
    Data publikacji:
    2019
    Wydawca:
    STE GROUP
    Tematy:
    akumulator
    duża gęstość energii
    battery
    high energy density
    Opis:
    Wprowadzanie do eksploatacji w podziemiach kopalń węgla coraz większej liczby napędów spalinowych stwarza znaczny dyskomfort pracy załóg górniczych, związany ze stężeniem spalin i emitowanym ciepłem. Bezemisyjny ciągnik podwieszony GAD-1 o napędzie akumulatorowym, wyposażony w ogniwa najnowszej generacji, może stanowić korzystną alternatywę w odniesieniu do urządzeń transportowych o napędzie spalinowym.
    Introduction of growing number of diesel drives to mine undergrounds creates a significant discomfort of work associated with concentration of exhaust gases and with generated heat. Emission-free GAD-1 suspended locomotive with electric drive, equipped with state-of-the-art batteries, can be an alternative design or can be a completion to diesel transportation machines.
    Źródło:
    Systemy Wspomagania w Inżynierii Produkcji; 2019, 8, 1; 247-251
    2391-9361
    Pojawia się w:
    Systemy Wspomagania w Inżynierii Produkcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation between Microstructure and Exothermic Reaction Kinetics of Al-CuO Thermite Nanocomposite Powders Fabricated by Cryomilling
    Autorzy:
    Oh, Minseok
    Kim, Kwanil
    Ahn, Byungmin
    Powiązania:
    https://bibliotekanauki.pl/articles/355529.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-CuO
    thermite
    nanocomposite
    cryomilling
    high energy density materials
    Opis:
    Al-CuO is a thermite material exhibiting the exothermic reaction only when aluminum melts. For wide spread of its applica-tion, the reaction temperature needs to be reduced in addition to the enhancement of total reaction energy. In the present study, a thermite nanocomposite with a large contact area between Al and CuO was fabricated in order to lower the exothermic reaction temperature and to improve the reactivity. A cryomilling process was performed to achieve the nanostructure, and the effect of composition on the microstructure and its reactivity was studied in detail. The microstructure was characterized using SEM and XRD, and the thermal property was analyzed using DSC. The results show that as the molar ratio between Al and CuO varies, the fraction of uniform nanocomposite structure was changed affecting the exothermic reaction characteristics.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 931-934
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spark Plasma Sintering of Mn-Zn Ferrite Powders by High Energy Ball Milling
    Autorzy:
    Suh, Jun Young
    Song, Yo-Seung
    Chang, Si Young
    Powiązania:
    https://bibliotekanauki.pl/articles/351276.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high energy ball milling
    nano-sized particles
    SPS
    conventional sintering
    density
    Opis:
    The Mn-Zn ferrite powders prepared by high energy ball milling were heat-treated, subsequently compacted and sintered by spark plasma sintering (SPS). Based on the observation of microstructure, the characteristics of samples after SPS were investigated and compared with ones after conventional sintering. The size of initial powders was approximately 650 nm and decreased to 230 nm after milling at 300 rpm for 3 h. After heat treatment at 973 K for 1 h, the milled powders became larger to approximately 550 nm in size again and the peaks of Mn2 O3 disappeared in XRD patterns. In the samples after SPS, the Fe2 O3 and MnZnFe2 O4 phases decomposed at the higher temperatures than 1173 K and 1373 K, respectively, while only MnZnFe2 O4 phase was detected in the samples conventionally sintered at 1273~1673 K. As the sintering temperature increased, the relative density after SPS increased more quickly than that after conventional sintering. In particular, it reached approximately 99% after SPS at 1473 K.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 565-569
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Study on Nitroimine Derivatives of Azetidine as High-Energy-Density Compounds
    Autorzy:
    Li, Bu-tong
    Li, Lu-lin
    Powiązania:
    https://bibliotekanauki.pl/articles/358762.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    high-energy-density compounds
    Kamlet-Jacobs equations
    azetidin derivatives
    Opis:
    A series of derivatives of azetidine were designed by stepwise replacing the hydrogen atoms of azetidine with nitroimine groups. At the G3MP2 level, the heats of formation (HOFs), bond dissociation energies (BDEs), molecular densities (ρ0), detonation velocities (D), and detonation pressures (P) of the nitroimine-substituted azetidines were investigated to look for high-energy-density compounds (HEDCs). It was found that the nitroimine-substituted azetidines have high HOFs and large BDEs, and sufficient thermal and kinetic stability. Furthermore, the covalent bond strength in the four-membered ring, accompanied by intramolecular hydrogen bonds, are the determining factors for isomer stability. Based on our calculations, derivatives E and F have better detonation performance than RDX and can be regarded as potential high-energy-density compounds. This work may provide basic information for further study of the title compounds.
    Źródło:
    Central European Journal of Energetic Materials; 2020, 17, 1; 107-118
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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