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    Wyświetlanie 1-5 z 5
    Tytuł:
    Two-Dimensional Optical Imaging of Artificial Magnetic Field in the Laboratory
    Autorzy:
    Li, X.
    An, N.
    Feng, X.
    Bai, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400280.pdf
    Data publikacji:
    2013-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Ja
    42.30.-d
    78.20.Ls
    Opis:
    Two-dimensional images of the artificial magnetic field created by permanent magnets were obtained by means of the Faraday magnetic rotation effect. This provides a convenient and effective means to observe and measure macro-scale magnetic field, as well as lays a base for three-dimensional optical imaging of magnetic field. The magnetic field imaging here can also be considered as a key part of the magnetic rotation geomagnetic field imaging method which we put forward before, and will provide experimental support for this method.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 1; 34-38
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and Characterization of HMX/Estane Nanocomposites
    Autorzy:
    Shi, X.
    Wang, J.
    Li, X.
    An, Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/358274.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    HMX
    Estane 5703
    spray drying
    nanocomposites
    thermal stability
    Opis:
    A new insensitive explosive based on octahydro-1,3,5,7-tetranitro1,3,5,7-tetrazocine (HMX) was prepared by spray drying using Estane 5703 as a binder. Scanning electron microscopy was used to characterize the morphology and particle size of the HMX/Estane 5703 nanocomposites. The composites were analyzed by X-ray diffractometry and differential scanning calorimetry and their impact sensitivity was determined. For comparison, raw HMX was also tested using these three methods. The nanocomposite morphology was found to be microspherical (1 to 8 μm diameter) and composed of many tiny particles, 30 to 150 nm in size. The crystal type of the HMX/Estane 5703 nanocomposites was unchanged. The activation energy, self-ignition temperature and average drop height of the raw HMX were 515.66 kJ·mol-1, 278.63 °C and 18.4 cm, respectively. In comparison, the corresponding values for the HMX/Estane 5703 nanocomposites were 488.92 kJ·mol-1, 279.3 °C and 75.4 cm, respectively.
    Źródło:
    Central European Journal of Energetic Materials; 2014, 11, 3; 433-442
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Insensitive Booster Explosive: DAAF Surface-coated with Viton A
    Autorzy:
    Li, X.
    Wu, B.
    Liu, S.
    An, C.
    Wang, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358841.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    DAAF
    refinement
    surface-coated
    thermal analysis
    impact sensitivity
    Opis:
    3,3’-Diamino-4,4’-azoxyfurazan (DAAF) is the principal component of an insensitive booster explosive; refined DAAF and DAAF surface-coated with Viton A were prepared. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and differential scanning calorimetry (DSC) were employed to characterize the morphology, composition, and thermal decomposition of these samples. The impact sensitivity and theoretical detonation velocity of DAAF-based composites were also measured and analyzed. The results showed that DAAF surface-coated with Viton A was successfully obtained, and the impact sensitivity of DAAF/Viton A composites was much lower than that of crude DAAF. In addition, DAAF/Viton A composites exhibited better thermal stability compared to crude DAAF and refined DAAF. The theoretical detonation velocity of DAAF/Viton A composites and TATB/Viton A composites are roughly the same. Therefore, there is still great potential for DAAF to be used as the main explosive component of a booster explosive.
    Źródło:
    Central European Journal of Energetic Materials; 2018, 15, 3; 445-455
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Process Optimization and Characterization of an HMX/Viton Nanocomposite
    Autorzy:
    Shi, X.
    Wang, C.
    Wang, J.
    Li, X.
    An, C.
    Ji, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/358667.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    HMX
    spray drying
    processing parameters
    optimization
    impact sensitivity
    nanoparticles
    Opis:
    HMX/Viton A nanocomposites were prepared by a spray drying process using different processing parameters, which included the dry gas inlet temperature, the air flow rate, and the solution feed flow rate. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the nanocomposites. The effects of the processing parameters on the morphology of the samples were investigated and are discussed. The thermal decomposition behaviour and impact sensitivity of the raw HMX and HMX/Viton A nanocomposites were also measured and compared. Optimal morphology and dispersion of the coated samples was achieved when the dry gas inlet temperature and the air and solution feed flow rates were 55 °C, 660 L/h and 1.5 mL/min, respectively. Under these optimal processing conditions, the nanocomposites were spherical in shape, ranged from 0.2-2 μm in size, and were composed of many tiny particles of 50-100 nm in size. The crystal phase of the nanocomposites was the same as that of raw HMX. Compared with those of raw HMX, the melting point and impact sensitivity of the nanocomposites were lower and the thermal decomposition rate was slightly higher.
    Źródło:
    Central European Journal of Energetic Materials; 2015, 12, 3; 487-495
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation of Al Nanoparticles and Their Influence on the Thermal Decomposition of RDX
    Autorzy:
    Hou, C.
    Geng, X.
    An, Ch.
    Wang, J.
    Xu, W.
    Li, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/358260.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    Al nanoparticles
    properties
    RDX
    thermal decomposition
    Opis:
    Aluminum (Al) nanoparticles were prepared by the DC arc plasma method in order to study the influence of Al nanoparticles on the thermal decomposition of cyclotrimethylenetrinitramine (RDX). The Al powder was characterized by TEM, BET, XRD, and LSA, and the thermal decomposition of RDX and RDX/nanometer Al were examined by DSC. Based on the DSC curves, the thermal decomposition parameters of the samples were calculated and compared. The results showed that the particles of Al are homogeneous and fine, and that the surface is smooth. The TEM results showed that the nanoparticles are spherical, with an average diameter of approximately 60 nm. The peak temperature of RDX decomposition decreased by 4.36 K at the heating rates of 5, 10, and 20 K/min after the addition of nano-Al powder, and the activation energy for decomposition decreased by about 11 kJ/mol. Furthermore, the critical explosion temperature was also reduced. These observable changes indicate that Al nanoparticles act as catalysts for the thermal decomposition of RDX.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 1; 123-133
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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