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    Wyświetlanie 1-7 z 7
    Tytuł:
    The Influence of Different Resin Cements and Pretreatments on the Bond Strength between Zirconia and Cement
    Autorzy:
    Sun, T.
    Hu, C.
    Wang, L.
    Shao, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1218424.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.85.jc
    Opis:
    The aim of this study was to analyze the influence of various luting materials and surface treatments on adhesive strength for zirconia ceramics and luting cements. The zirconia framework specimens were made into cylinders. Prior to cement, zirconia framework specimens underwent various surface treatments (sandblasting with 110 μm $Al_2O_3$ particles, milling with 240-grift silicon sand paper and silanization). Resin luting cement and glass ionomer luting cement were then applied on the surface of zirconia specimens. The specimens were then subjected to a shear force. The fractured surfaces were visually analyzed by scanning electron microscopy. The shear bond strength values of resin luting cement bonded to zirconia specimens were significantly higher than glass ionomer luting cement bonded to zirconia specimens (P < 0.05). The shear bond strength values of zirconia specimens sandblasted with 110 μm $Al_2O_3$ particles were significantly higher than those milled with silicon carbide papers and underwent silanization (P < 0.05). The shear bond strength values of zirconia specimens milled with silicon carbide papers and underwent silanization were not significantly different (P < 0.05). The highest shear bond strength values were achieved when the zirconia specimens were sandblasted and bonded to resin luting cement. Airborne-particle abrasion was an effective method which could enhance the bond strength of zirconia ceramics and cements. The resin luting cement exhibited a higher bond to zirconia than glass ionomer luting cement.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 313-315
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Predictions of Lattice Parameters and Mechanical Properties of Pentaerythritol Tetranitrate under the Temperature and Pressure by Molecular Dynamics Simulations
    Autorzy:
    Tan, J.J.
    Hu, C.
    Li, Y.
    Ge, N.
    Chen, T.
    Ji, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033453.pdf
    Data publikacji:
    2017-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    molecular dynamics
    lattice parameter
    equation of state
    elasticity
    mechanical properties
    Opis:
    Molecular dynamics simulations with condensed-phase optimized molecular potentials for atomistic simulation studies force field are performed to investigate the structure, equation of state, and mechanical properties of high energetic material pentaerythritol tetranitrate. The equilibrium structural parameters, pressure-volume relationship and elastic constants at ambient conditions agree excellently with experiments. In addition, fitting the pressure-volume data to the Birch-Murnaghan or Murnaghan equation of state, the bulk modulus B₀ and its first pressure derivative B'₀ are obtained. Moreover, the elastic constants are calculated in the pressure range of 0-10 GPa at room temperature and in the temperature range of 200-400 K at the standard pressure, respectively. By the Voigt-Reuss-Hill approximation, the mechanical properties such as bulk modulus B, shear modulus G, and the Young modulus E are also obtained successfully. The predicted physical properties under temperature and pressure can provide powerful guidelines for the engineering application and further experimental investigations.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 2; 318-323
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optically Detected Magnetic Resonance of Excess Electrons in CdTe/(Cd,Mg)Te Quantum Wells
    Autorzy:
    Hu, C. Y.
    Ossau, W.
    Yakovlev, D. R.
    König, B.
    Wojtowicz, T.
    Karczewski, G.
    Kossut, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1969094.pdf
    Data publikacji:
    1998-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.70.Hb
    71.35.-y
    71.35.Ji
    Opis:
    The spin resonance of excess electrons is observed with the detection either on the neutral or the negatively charged exciton X$\text{}^{-}$ emission in type I CdTe/(Cd,Mg)Te quantum wells with excess electrons of low density. It is found that the electron spin-dependent and electron spin-conserving formation and recombination of X$\text{}^{-}$ make the optical detection of the spin resonance of excess electrons feasible. For the first time, optically detected magnetic resonance is used to study fast optical transition processes in the nanosecond timescale where the microwave-induced magnetic transition rate is much lower than the optical transition rate.
    Źródło:
    Acta Physica Polonica A; 1998, 94, 2; 351-354
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical Reactions and Electronic Functions of Carbon Cluster Arrays Studied by Scanning Tunneling Spectroscopy and High-resolution Electron Energy Loss Spectroscopy
    Autorzy:
    Kasuya, A.
    Hu, C.-W.
    Suto, S.
    Tohji, K.
    Takahashi, H.
    Czajka, R.
    Wawro, A.
    Nishina, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968721.pdf
    Data publikacji:
    1998-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.16.Ch
    61.14.Rq
    73.61.Wp
    Opis:
    Novel nanometer scale structures have been produced by thermal heating or laser irradiation on the surface of single- and multi-layers of C$\text{}_{60}$ and C$\text{}_{84}$ on Si. These structures were examined by combined measurements of scanning tunneling spectroscopy and high resolution electron energy loss spectroscopy. The results show specific chemical reactions of substrate with carbon clusters having single- and double-bonded network. Covalent bonds are formed in some of these chemical reactions.
    Źródło:
    Acta Physica Polonica A; 1998, 93, 2; 317-322
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties of the $K_{α}$ X-Ray Transitions in Highly Ionized Chlorine
    Autorzy:
    Jiang, C.
    Hu, F.
    Zang, Y.
    Jiang, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1204977.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    31.15.V-
    31.30.jc
    Opis:
    Relativistic configuration interaction calculations with the inclusion of the Breit interaction, quantum electrodynamics and finite nuclear mass corrections have been carried out in the extended optimal level scheme using multi-configuration Dirac-Fock wave functions on the wavelengths, electric dipole transition rates and oscillator strengths of chlorine. Through the use of the active space method, the calculated values are compared with the other available data on He-like and Be-like chlorine and are found to be in very good agreement with them. In this paper we give accurate transition properties from Cl(VIII) through Cl(XVI). These data provide reference value for level lifetime, charge state distribution and average charge of chlorine plasma.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 3; 694-699
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electric Interaction between Two Identical Conducting Spheres in a Uniform Electric Field
    Autorzy:
    Gao, X.
    Wang, Q.
    Li, C.
    Hu, L.
    Sun, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401870.pdf
    Data publikacji:
    2015-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    41.20.Cv
    47.65.Gx
    Opis:
    An experimental apparatus is devised to measure the interaction between two spheres separated by a small gap in a uniform electric field. The results show that the interaction between two conducting spheres is near that between two dielectric spheres with high permittivity. Accordingly, the calculation can be simplified by mirror image method, for it is only available for conducting system. A method using multiple mirror images of point charges is put forward to analyze the induction of two identical conducting spheres in a uniform electric field. The key operation on how to add compensative charges is emphasized and given out in detail. The results from experiment and calculation are compared, and they agree with each other very well.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 3; 289-293
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interaction of Magnetic Nanoparticles with Lyotropic Liquid Crystal Studied by AFM
    Autorzy:
    Tomašovičová, N.
    Yang, C.
    Balejčíková, L.
    Gdovinová, V.
    Kubovčíková, M.
    Hayryan, S.
    Hwang, I.
    Hu, Chin-Kun
    Kopčanský, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032211.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.Fk
    87.14.em
    82.37.Gk
    Opis:
    In this work the interaction of lysozyme fibrils with magnetic particles has been studied by atomic force microscopy. The experiments were carried out for a better understanding of the binding process of such complex soft matter systems. The obtained results show that interaction between lysozyme fibrils and magnetic particles starts immediately after mixing them together. Moreover, the samples remain stable in duration of several days after preparation.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 958-960
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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