Materials Literature
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In the article the comparison between a method of definition of capillary characteristics of textile materials and a method of definition of washing ability of binary solutions of PEAHENS is presented. For textile materials the most popular using method is the indirect method of an estimation of wetting by means of he…
Целью работы являлось решение актуальной задачи определения предельного содержания реагирующих веществ, обеспечивающего безопасность реализации процесса реакционного механического легирования.
Визначено структуру та основні етапи розробки металогідридних систем для енерготехнологічної переробки водню, що дає можливість провести розрахунки роботи системи та повністю визначити комплекс конструктивних та режимних параметрів, які характеризують її загальну ефективність.
TiO2 is a material with attractive properties which have led to various applications such as anti-reflective coatings [1] or self cleaning surfaces [2]. One of the most applied deposition techniques used for TiO2 is reactive magnetron sputtering. Unfortunately TiO2 suffers from a comparatively low deposition rate when…
采用标准电子陶瓷工艺制备了(Mg0.95Zn0.05)2(Ti0.8Sn0.2)O4陶瓷。研究了(Mg0.95Zn0.05)2(Ti0.8Sn0.2)O4陶瓷的烧结特性、相结构和微波介电性能。采用X射线衍射分析其物相组成,利用SEM观察其显微结构。XRD图谱表明烧结样品为立方尖晶石(Mg0.95Zn0.05)2(Ti0.8Sn0.2)O4结构,晶胞参数为a=b=c=0.848794nm。实验结果表明,随烧结温度升高,样品相对介电常数(er)和品质因数(Q.f)先增加后减小,谐振频率温度系数(τf)变化不大。1325℃/5h烧结样品具有优良微波介电性能:er=13.1,Q.f=131170GHz(10GHz)、τf=-55.6×10…
Photocatalytic conversion of water to hydrogen and oxygen is a promising avenue for the production of fuels from solar energy. While many semiconductors can absorb solar photons and catalyze the production of hydrogen and oxygen from water, the process typically produces hydrogen at low rates because of inherent defic…
Sonofusion phenomenon will not be achieved unless there is an appropriate host media. To increase the probability of sonofusion reaction, the cavitating bubble’s radius must be as large as possible and due to the bubble collapse, it produces intense shock waves. In this paper, the effective parameters in sonofusion me…
Influence of gases (Ar, He, N2, SO2, O2) and sodium nitrite on the intensity of the solid-state and nitrogenous components of terbium sulfate triboluminescence was studied. A saturation by SO2 and addition of sodium nitrite crystals lead to suppression of the both components. Oxygen suppresses the nitrogen linesonly.…
The synthesis temperature affected the properties and photo catalytic activity of Tantalum (V) nitride (Ta3N5) nanoparticles for hydrogen evolution. The Ta3N5 prepared at lower temperature showed higher photo catalytic activity due to the lower particle size and higher surface area.
Создана экспериментальная установка для измерения времен затухания люминесценции\nредкоземельных ионов в конденсированных средах (кристаллах, стеклах и растворах). С\nиспользованием методики, позволяющей устранить влияние перепоглощения излучения,\nпроведены измерения времени затухания люминесценции ионов Yb3+ в крист…
Regenerative titanium dioxide (TiO2) photoelectrochemical solar cells are regarded as a potential low-cost alternative to conventional solid-state photovoltaic devices such as silicon-based solar cells, However, charge collection and transport in TiO2-based devices is poor - significant charge recombination occurs due…
In this paper, the processes of birth, decay and formation of stable polytetrahedral nanoclusters in the structure of amorphous alloy Cu80Zr20 in the process of quenching from the liquid phase are studied by the molecular dynamics method
The influence of microwave frequencies at high temperature on the structural properties of Boron Nitride (BN) powder had been investigated. Crystallite size, microstrain and the graphitization index (G.I.) were determined before and after the microwave measurements. The x-ray diffraction patterns showed a remarkable i…
Aluminium doped zinc oxide (ZnO:Al) films prepared by magnetron sputter deposition and surface textured by etching are widely applied in silicon thin film solar cells. Based on 15 years of experience in ZnO texturization for solar cell application in our institute we propose an etch model, that describes the interacti…
Manganese oxides typically form by the oxidation of aqueous Mn(II) catalyzed by mineral surfaces and are nonspecific but potent redox-active mineral components commonly found in the environment. They therefore participate in a wide array of reactions with organic and inorganic compounds. They often exhibit high sorpti…
Our presented research is focused on cross section measurements of (n,xn gamma) reactions in the framework of Generation IV nuclear reactors studies. Indeed the development of new fast reactors or the investigations concerning new fuel cycles require the improvement of nuclear data bases over a wide range of energies,…
Topological insulators(TIs) constitute a novel state of quantum matter which possesses non-trivial topological properties. Although discovered only in the recent few years, TIs have attracted intensive interest among the community of condensed matter physics and material science. TIs are insulating in the bulk but ha…
At different heating rates, the glass transition temperature (T g) and the crystallization temperature (Tc) are obtained from the non-isothermal differential scanning calorimetry (DSC) measurements of bulk Ga15Se85-xAgx (x = 0, 2, 4, 6 and 8) chalcogenide glasses prepared by melt quenching technique. Their amorphous s…
采用快速共沉淀法制备Ni0.8Co0.1Mn0.1（OH）2前驱体,利用前驱体与LiOH.H2O的高温固相反应得到锂离子电池层状正极材料LiNi0.8Co0.1Mn0.1O2,探讨pH值对材料结构和电化学性能的影响。通过X射线衍射（XRD）、扫描电镜（SEM）和电化学测试对合成样品进行表征。结果表明,pH值为11.00~12.00时,合成的Ni0.8Co0.1Mn0.1（OH）2前驱体均无杂相;pH值为11.50时,合成的前驱体制备出的正极材料具有良好的电化学性能,0.1C倍率下首次放电比容量为192.4 mA.h/g;经过40次循环,容量保持率为91.56%。
The production and use of Ra-226 sealed sources was internationally recommended to be halted for health and safety reasons. Consequently, all Ra-226 sources in Cuba were collected, characterized and conditioned. The paper describes the safety and operational aspects related to the Ra-226 conditioning. For this, a Spec…