Materials Literature
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Методом наведенного тока в растровом электронном микроскопе (EBIC) и методом тока, индуцированного световым пучком (LBIC), исследованы структурные дефекты, влияющие на эффективность солнечных элементов на основе мультикристаллического кремния. Экспериментально показано, что при больших значениях диффузионной длины и г…
X-ray absorption spectroscopy is a powerful tool for the diagnosis of plasmas over a wide range of both temperature and density. However, such a measurement is often limited to probing plasmas with temperatures well below that of the x-ray source in order to avoid object plasma emission lines from obscuring important…
In this study a new group of metal composite foam was demonstrated as absorption material. Closed cell metal foam was produced by casting around ceramic hollow spheres and mechanical properties were verified by uni-axial compressive test. The effect of random and ordered arrangement, density variation and sample size…
We made an off-axis surface of SiC with the chemical-mechanical polishing (CMP) method to examine the influence of an atomic step on the electronic properties. It became clear that processing pressure had the threshold in the electric field that let the removal of the atom accelerate using the abrasive of the piezoele…
用静态腐蚀失重法和电化学技术,研究饱和CO2-H2S介质中温度和Cl-对Cr13钢腐蚀行为的影响。结果表明：介质中不含Cl-时,Cr13钢在饱和CO2-H2S体系中的腐蚀速率随温度的升高先升高后降低,且当温度为70℃时,Cr13钢的腐蚀速率达到最大值;介质中Cl-质量浓度为100 g/L时,Cr13钢在介质中的腐蚀速率随温度的升高而升高。较低温度50℃时,Cr13钢表面上形成的腐蚀产物膜主要以FeS为主;而高温150℃时,腐蚀产物膜则以Fe1-xS为主。随温度增加,Cr13钢在饱和CO2-H2S介质体系中的电化学反应电阻降低,表明Cr13钢发生腐蚀的倾向和反应速率增加,并且Cl-的存在使得相同温度下交流阻抗曲线的曲率半径缩小,这表…
The morphological and functional characteristics of the cells in cultures in the presence of nanoparticles of Eu2O3 and luminescence characteristics of nanoparticles in cells and also the possible toxic effect of nanoparticles of Eu2O3 in the range of 6.8–340 μg/ml for SPEV cell line, human fibroblasts in suspension w…
Изучено влияние концентрации пропиленоксида и катализатора (salen)CoDNP/[PPN]Cl ((salen)CoDNP: [PPN]Cl = 1 моль/моль) на кинетику сополимеризации СО2 с пропиленоксидом при давлении 0.5 МПа и температуре 20°С. Процесс протекает при постоянной скорости после индукционного периода, длительность которого изменяется при из…
Residual voids in degassing process of encapsulation gel for a power device limit the lifetime and the performance of the device itself because of the partial discharges occurrence in it. In this paper the limit of the degassing capability is evaluated based on the equation of equilibrium. It turns out that the gas in…
固体表面のナノメートル領域における化学結合状態（原子価状態）変化を高速でリアルタイム観察するための手法について述べた．本手法の概略は，固体試料に放射光軟X線を照射し，表面から放出される全光電子を静電レンズ系で拡大し画像化するものであり，空間分解能は40 nmである．照射する放射光軟X線の集光素子として，近年開発されたポリキャピラリーを用い，キャピラリーの位置をビーム方向及びビームと直角の水平方向に微調整しビームを最適化することにより，バルクの試料について10ミリ秒でも明瞭な画像観察を行うことが可能となった．また，局所部における化学結合状態を観察するための顕微X線吸収スペクトル（顕微XAFS）測定の高速化について検討した結果，シリコ…
Asian Journal of Chemistry, a Multidisciplinary Chemistry Journal is an Peer Reviewed International Journal and publishes from India. The journal has been established since January 1989 on a firm foundation of International Quality Research. This Journal encompasses all branches of chemistry and its sub – disciplines…
利用激光熔融静电纺丝技术制备了PLLA/PCL及PLLA/PCL/nHA复合纤维,热压后形成层压复合纤维支架。利用扫描电镜对纤维支架进行了表征,同时对其进行了亲水性的测试,最后通过倒置荧光显微镜和MTT实验对复合纤维支架的细胞相容性进行了评价。研究结果表明,层压复合纤维支架的直径和孔结构具有多样性,nHA能够提高PLLA/PCL层压纤维支架的亲水性,改善支架的细胞相容性,增加细胞的附着能力,提高细胞的存活率。
В рамках теории функционала электронной плотности (в приближении B3LYP/6-311++G**) рассчитана элементарная реакция отрыва молекулы H2 от аниона [B10H11]-, предположительно являющаяся лимитирующей стадией кислотно-катализируемых реакций замещения экзо-полиэдрических атомов H в декагидро-клозо-декаборатном анионе [B10H1…
Strain engineering is ubiquitous in design and fabrication of innovative, high-performance electronic, optoelectronic, and photovoltaic devices. Raman spectroscopy is one of the most straightforward techniques that has been utilized to estimate the localized strain. However, this technique is incapable of measuring th…
介绍了相移Rugate薄膜空间滤波器的基本结构和原理,设计了相移Rugate薄膜滤波器,根据实际制备的条件进行了误差分析,给出了制备技术需要达到的精度和所需要的薄膜材料的消光系数,计算了相应的损耗,并分析了空间滤波器内部的电场分布。
A transparent hybrid film with hydroxypropylcellulose (HPC, Mw: 1.0×105) and silica particles (SiO2, average diameter: 12.3 nm) was prepared by a solution cast method, based on the specific dispersion-agglomeration behavior of HPC/SiO2 nanohybrid aqueous suspensions. For the transparent suspension, with 10% of total w…
Изучено влияние параметров механохимической активации энергонапряженности и времени обработки смеси гидроксокарбоната никеля NiCO3 · 2Ni(OH)2 · nH2O и парамолибдата аммония (NH4)6Mo7O24 · 4H2O на фазовый состав, удельную поверхность и морфологию механоактивированных продуктов при различных атомных отношениях Ni :…
ABSTRACTNovel ultra-hard materials: single-phase (binderless) polycrystalline diamond and cBN, have been produced by direct conversion sintering under static high pressure and high temperature. The polycrystalline diamond and cBN consist of fine grains of several tens or hundreds nano-meters without containing any sec…
在变形温度800~1100℃,变形速率0.01~5 s-1范围内,利用Gleeble-1500D热模拟试验机,采用等温压缩实验研究了Fe-25Mn-3Al高锰奥氏体TWIP钢的热变形行为。结果表明,Fe-25Mn-3Al钢流变应力曲线出现一个明显的流变应力峰值,峰值之后流变应力逐渐降低,主要为稳态流变特征。双曲正弦形式的Arrhenius模型可以较好地描述Fe-25Mn-3Al钢热变形流变应力,钢的热变形激活能Q为365.2 kJ/mol。动态再结晶机制为Fe-25Mn-3Al钢热变形过程中最主要的动态软化机制。
We present designs of 1.65 NA visible imaging lens with 1.75 mm field size and 20× magnification. Small obscuration is enabled using semi-transparent annular surface or novel multi reflections optical element.
Most fuel cell modelling at the stack scale to date has focused on either the flow distribution, or electrochemistry, neglecting any coupled effects, due to computational limitations. In this paper, the authors describe the development and application of a novel methodology, whereby diffusion terms in the transport eq…