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Peculiarities of Surface Interaction of Al+REM Alloys with Air and Water Al+REM合金与空气和水表面相互作用的特性
Pub Date : 2017-08-01 DOI: 10.13189/UJPA.2017.110402
N. Popov, L. A. Akashev, V. Shevchenko, I. G. Grigorov
The effect of the phase and chemical composition of aluminium+rare earth metal (1-2.5%R, ~22%R) polycrystalline alloys (Al+REM) on the rate of their surface film growth in air (at temperatures 400, 500, 600℃) and in water (~100℃) was studied. It is shown that in the temperature range 500-600℃ the oxidation of 1-2.5%R alloys in air is enhanced due to the increasing amount of REM oxide phases and crystallization of amorphous Al2O3. Al+1at.%Yb alloy shows the lowest oxidation stability in this temperature range owing to the formation of the greatest amount of REM oxides. Oxidation of Al+REM (~22%R) alloys in air begins at a temperature below 400℃. Their oxidation rate depends on the type and amount of dopant metal and the phase composition: the presence of REM-rich intermetallics in the alloy dramatically increases its reactivity. It is established that in the interaction of Al+REM alloys with boiling water, the active reacting phase is aluminum.
研究了铝+稀土金属(1-2.5%R, ~22%R)多晶合金(Al+REM)在空气(400、500、600℃)和水中(~100℃)中物相和化学成分对表面膜生长速率的影响。结果表明,在500 ~ 600℃范围内,1-2.5%R合金在空气中的氧化作用增强,主要是由于REM氧化相数量的增加和非晶Al2O3的结晶。铝+ 1。%Yb合金在此温度范围内氧化稳定性最低,因为形成的REM氧化物最多。Al+REM (~22%R)合金在400℃以下的空气中开始氧化。它们的氧化速率取决于掺杂金属的种类和数量以及相组成:合金中富含rem的金属间化合物的存在显著提高了其反应性。结果表明,Al+REM合金与沸水相互作用时,活性反应相为铝。
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引用次数: 2
Fabrication of Straight Optical Waveguides Based on SnO 2 Nanomaterials 基于二氧化硅纳米材料的直波导制备
Pub Date : 2017-08-01 DOI: 10.13189/UJPA.2017.110406
Asnawi, G. Yudoyono, Y. H. Pramono
The manufacture technology of thin film waveguides had done by placing a solution of tin dioxide (SnO2) on the glass substrate. The structure of the straight waveguide consists of a slide glass substrate, waveguide using tin oxide film, and the cover waveguide is the MMA (Methyl Methacrylate) film. The method for making this waveguides, the waveguide was fabricated using the spin coating method and photolithography technique. The method for making this waveguides, the waveguide was fabricated using the spin coating method and photolithography technique. Analysis of the intensity of the input and output on a straight channels waveguide is done by an optical microscope with the light source of He-Ne laser. The results have obtained the multimode waveguides with the average thickness of straight channels is 16.67 μm.
薄膜波导的制造技术是通过在玻璃衬底上放置二氧化锡溶液来完成的。直波导的结构由玻片衬底、波导采用氧化锡薄膜和覆盖波导为MMA(甲基丙烯酸甲酯)薄膜组成。制作这种波导的方法是采用自旋镀膜法和光刻技术制备这种波导。制作这种波导的方法是采用自旋镀膜法和光刻技术制备这种波导。在He-Ne激光光源下,利用光学显微镜对直通道波导的输入输出强度进行了分析。结果表明,该多模波导的平均直道厚度为16.67 μm。
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引用次数: 2
In Situ Investigation of Oxidation of Aluminum Alloy Powders with Calcium and Barium by Synchrotron Radiation 同步辐射对铝合金粉钙钡氧化的原位研究
Pub Date : 2017-08-01 DOI: 10.13189/ujpa.2017.110404
V. Shevchenko, D. Eselevich, A. Ancharov, B. Tolochko
The phase composition and structure of initial powders and the products of oxidation of aluminum alloys with calcium and barium containing 0.88 and 0.26 at.% of dopants, respectively, have been studied for the first time by the diffraction method with the use of synchrotron radiation during programmed heating in air up to 1273 K at a rate of 10 K/min. It was established that as a result of the heterogeneity of the phase composition of the oxidation products and the structural changes in the oxide shell on the particle surface, aluminum oxide loses its high protective properties and metal oxidation is activated.
研究了0.88 at和0.26 at的钙钡氧化铝合金初始粉末和氧化产物的相组成和结构。采用同步辐射在1273 K的空气中以10 K/min的速率程控加热,首次用衍射法对各%的掺杂剂进行了研究。结果表明,由于氧化产物相组成的不均匀性和颗粒表面氧化壳的结构变化,氧化铝失去了其高保护性能,激活了金属氧化。
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引用次数: 0
Photophysical Features of Phthalocyanines Metallocomplexes with Out-of-Plane Ligands 具有面外配体的酞菁金属配合物的光物理特性
Pub Date : 2017-08-01 DOI: 10.13189/UJPA.2017.110403
A. Starukhin, A. Gorski, V. Knyukshto, M. Kijak, I. Tretyakova, Yan Dovbii, V. Chernii
The objective of this work was synthesizing of Ti-, Zr-, Hf-phthalocyanines, containing chloride ions or dibenzoylmethanate fragments coordinated in out-of-plane positions to macrocycle. Spectroscopic and photophysical parameters of phthalocyanines metallocomplexes with metal atoms Ti(IV), Zr(IV) and Hf(IV) and spectroscopic features of Mg- and Zn-phthalocyanines have been detected and characterized at ambient and liquid nitrogen temperatures. The efficient intersystem crossing observed for Hf-phthalocyanine leads to very weak fluorescence and suppresses the fluorescence lifetimes to less than 1 ns. Changing of nature of central metals from heavy Hf(IV) atom to lighter atoms: Zr(IV), Zn(II), Ti(IV), Mg(II) lead to noticeable increasing of fluorescence lifetimes up to maximum value of 6,6 ns for Mg-phthalocyanine. At the same time the values of fluorescence quantum yield rises from 1 % for Hf-phthalocyanine to 56 % for Mg-phthalocyanine. The heavy atom effect has a substantially greater impact on photophysical parameters metallocomplexes of phthalocyanines than influence of attachment out-of-plane ligands.
本工作的目的是合成含有氯离子或二苯甲酰甲烷酸片段的平面外配位大环的Ti-, Zr-, hf -酞菁。在环境温度和液氮温度下,检测并表征了含有金属原子Ti(IV)、Zr(IV)和Hf(IV)的酞菁金属配合物的光谱和光物理参数以及Mg-酞菁和zn -酞菁的光谱特征。观察到hf -酞菁的有效系统间交叉导致非常弱的荧光,并将荧光寿命抑制到小于1ns。中心金属的性质由重Hf(IV)原子转变为较轻的Zr(IV)、Zn(II)、Ti(IV)、Mg(II)原子,导致荧光寿命显著增加,Mg-酞菁的荧光寿命最大值为6,6 ns。同时,荧光量子产率从hf -酞菁的1%提高到mg -酞菁的56%。重原子效应对酞菁金属配合物光物理参数的影响远大于在面外配体的影响。
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引用次数: 1
Optical and Electrical Properties of Antimony and Fluorine Doped Tin Oxide Thin Films 锑和氟掺杂氧化锡薄膜的光学和电学性质
Pub Date : 2017-06-01 DOI: 10.13189/UJPA.2017.110304
S. Oo, Zayar Thu, Than Zaw Oo, P. Kaung
The Sb:F:SnO 2 layers (AR) were prepared by spray pyrolysis method. The anti-reflective layers (AR) heat-treated at 500℃ for 30 min (solution amount 20 cc and 25 cc) have shown an improved crystallinity with crystallite size of 38-39 nm, high optical transmission of around 70 % at 450 nm. Incorporation of anti-reflective layer at cathode interface of SiO 2 /Si(N) devices increased the power conversion efficiency from 1.2% to 2.7% which is mainly contributed from photocurrent enhancement. The enhanced efficiency mainly contributed to the increase in J sc . It is attributed to enhanced light absorption and better charge transport in the SiO 2 /Si (N) device with Sb:F:SnO 2 AR layer. Results of optical and electrical studies show that the films are well suited for thin film solar cell as a window layer.
采用喷雾热解法制备Sb:F: sno2膜(AR)。经500℃热处理30 min(溶液量分别为20和25 cc)的增透层结晶度得到改善,晶粒尺寸为38 ~ 39 nm,在450 nm处透光率高达70%左右。在sio2 /Si(N)器件的阴极界面引入抗反射层,使功率转换效率从1.2%提高到2.7%,这主要得益于光电流的增强。效率的提高主要是由于jsc的增加。这是由于有Sb:F: sno2 AR层的sio2 /Si (N)器件增强了光吸收和更好的电荷输运。光学和电学研究结果表明,该薄膜非常适合用作薄膜太阳能电池的窗口层。
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引用次数: 2
The Total Ground State Energies and First Ionization Energies of the Incomplete 3d-Transition Metal-Elements Atoms 不完全三维过渡金属元素原子的总基态能和第一电离能
Pub Date : 2017-06-01 DOI: 10.13189/ujpa.2017.110303
Ebtehal Althobaiti, A. Ismail, M. Sabry
We studied the incomplete 3d-transition metal-lements, scandium through nikel, atoms and their corresponding cations by diffusion Monte Carlo (DMC) method with three different basis sets, namely VTZ_ANO, Stuttgart RSC 1997 ECP, and CRENBL ECP. Our calculations for total ground state energy and first ionization potential, agree very well with studies used LANL2DZB3LYP as basis sets, and with the experimental values of first ionization potential. Moreover, we found that the calculations with VTZ_ANO basis set are more accurate than those with the other two basis sets.
采用扩散蒙特卡罗(DMC)方法,采用VTZ_ANO、Stuttgart RSC 1997 ECP和CRENBL ECP三种不同基集研究了不完全三维过渡金属元素钪-镍、原子及其相应阳离子。我们计算的总基态能和第一电离势与以LANL2DZB3LYP为基集的研究和第一电离势的实验值吻合得很好。此外,我们发现使用VTZ_ANO基集的计算比使用其他两个基集的计算更准确。
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引用次数: 0
Crystal Structure and Theoretical Study of N,N-di[(5-chloro-2-oxo-2,3-dihydrobenzo[d]oxazole-3-yl)methyl]ethanamine N,N-二[(5-氯-2-氧-2,3-二氢苯并[d]恶唑-3-基)甲基]乙胺的晶体结构及理论研究
Pub Date : 2017-04-01 DOI: 10.13189/ujpa.2017.110203
A. Aydın, Zeynep Soyer, M. Akkurt, O. Büyükgüngör
The aim of the present work is to explore crystal and electronic structure of N,N-di[(5-chloro-2-oxo-2,3-dihydrobenzo[d]oxazole-3-yl)methyl]ethanamine. In the title compound, C18H15Cl2N3O4, the two 2, 3-dihydro-1, 3-benzoxazole ring systems are almost planar and make a dihedral angle of 96.12(7) with each other. The ethyl group is disordered over two set of sites with a site-occupancy ratio of 0.766(12):0.234(12). The crystal structure contain intermolecular C—H...O hydrogen bonds which form a zigzag chains along the c-axis, C—H...π interactions and π-π stacking interactions [centroid-centroid distance = 3.5668(19) A].
本研究的目的是研究N,N-二[(5-氯-2-氧-2,3-二氢苯并[d]恶唑-3-基)甲基]乙胺的晶体结构和电子结构。在标题化合物C18H15Cl2N3O4中,两个2,3 -二氢- 1,3 -苯并恶唑环体系几乎是平面的,彼此的二面角为96.12(7)。乙基在两组位点上无序分布,位点占用率为0.766(12):0.234(12)。晶体结构包含分子间C-H…O氢键沿着c轴形成之字形链,C-H…π相互作用与π-π叠加相互作用[质心-质心距离= 3.5668(19)A]。
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引用次数: 1
Path to 1-MW at J-PARC Rapid Cycling Synchrotron J-PARC快速循环同步加速器达到1mw的路径
Pub Date : 2017-04-01 DOI: 10.13189/UJPA.2017.110202
K. Yamamoto, Masanobu Yamamoto, T. Morishita, H. Harada, H. Oguri, K. Hasegawa, M. Kinsho
The accelerator system at Japan Proton Accelerator Research Complex (J-PARC) has been operational since May 2008 and has mainly been used to perform physics experiments. The accelerator system consists of a Linac, a Rapid Cycling Synchrotron (RCS), and a Main Ring Synchrotron. The originally designed RCS injection energy is 400MeV, but the first operation started at 181MeV. New acceleration cavities were installed in J-PARC Linac during the summer shutdown of 2013, and user operation by the Material and Life science Facility (MLF) at the injection energy of 400MeV was started from February 2014. Post beam commissioning of 400MeV injection energy, beam loss was small enough, and we established 300kW continuous operation. Subsequently, the peak current of the Linac was increased from 30mA to 50mA. This upgrade enabled us to try 1-MW beam acceleration. Finally, after some additional improvements, we successfully accelerated 1-MW equivalent protons.
日本质子加速器研究中心(J-PARC)的加速器系统自2008年5月开始运行,主要用于进行物理实验。加速器系统由直线加速器、快速循环同步加速器(RCS)和主环同步加速器组成。最初设计的RCS注入能量为400MeV,但首次运行时的能量为181MeV。在2013年夏季停工期间,J-PARC直线加速器安装了新的加速腔,材料与生命科学设施(MLF)从2014年2月开始在注入能量为400MeV的情况下进行用户操作。注入能量为400MeV的束流调试后,束流损耗足够小,并建立了300kW连续运行。随后,直线加速器的峰值电流从30mA增加到50mA。这次升级使我们能够尝试1兆瓦的波束加速。最后,经过一些额外的改进,我们成功地加速了1兆瓦当量的质子。
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引用次数: 0
Standard Cosmological Models with ∧ > 0 ∧> 0的标准宇宙学模型
Pub Date : 2017-04-01 DOI: 10.13189/UJPA.2017.110204
Paulo Aguiar
In this paper we show that the cosmological standard models can describe our universe very realistic way if we add a positive value of the cosmological constant, without the need for the introduction of cold dark matter. Also we clarify that it is physically allowed objects to move in the Universe at speeds greater than light speed without violation of Einstein's postulates.
在本文中,我们证明了如果我们添加一个正的宇宙常数,而不需要引入冷暗物质,宇宙学标准模型可以非常真实地描述我们的宇宙。我们还澄清,物理上允许物体在宇宙中以大于光速的速度运动而不违反爱因斯坦的假设。
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引用次数: 0
Fractal Scaling or Scale-invariant Radar: A Breakthrough into the Future 分形尺度或尺度不变雷达:未来的突破
Pub Date : 2017-02-01 DOI: 10.13189/UJPA.2017.110103
A. Potapov
Results of application of theory of fractal and chaos, scaling effects and fractional operators in the fundamental issues of the radio location and radio physic are presented in this paper. The key point is detection and processing of super weak signals against the background of non-Gaussian intensive noises. The main ideas and strategic directions in synthesis of fundamentally new topological radar detectors of low-contrast targets / objects have been considered. The author has been investigating these issues for exactly 35 years and has obtained results of the big scientific and practical worth. The reader is invited to look at the fundamental problems with the synergetic point of view of non-Markovian micro- and macro- systems. The results of big practical and scientific importance obtained by the author were published in four summary reports of the Presidium of Russian academy of science (2008, 2010, 2012, and 2013) and in the report for the Government of Russian Federation (2012).
本文介绍了分形和混沌理论、尺度效应和分数算子在无线电定位和无线电物理基本问题中的应用结果。关键是在非高斯强噪声背景下对超弱信号的检测和处理。讨论了新型低对比度目标/物体拓扑雷达探测器合成的主要思路和战略方向。笔者对这些问题进行了整整35年的研究,取得了具有重大科学和实用价值的成果。请读者以非马尔可夫微观和宏观系统的协同观点来看待基本问题。在俄罗斯科学院主席团的四份总结报告(2008年、2010年、2012年和2013年)和俄罗斯联邦政府报告(2012年)中发表了作者获得的具有重大现实和科学意义的成果。
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引用次数: 6
期刊
Universal Journal of Physics and Application
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