Materials Literature
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The charge transfer excited state of a mechanically interlocked [2]rotaxane (R(4+)) with a donor 1,5-dioxynaphthalene (DNP) unit in the rod and the acceptor cyclobis(paraquat-p-phenylene) (CBPQT(4+)) ring component, along with the analogous non-interlocked [2]pseudorotaxane (P(4+)), is studied by resonance Raman spect…
The dynamic process of cold crystallization of amorphous poly(trimethylene terephthalate) (PTT) was investigated with resonance light scattering (RLS). By using an enhanced scattering peak at 329 nm, which was in close proximity to the absorption band of PTT film, density fluctuation due to gradual transition from amo…
The dependences of the internal friction and the Young’s modulus defect of polycrystalline indium on the oscillatory strain amplitude have been studied over a wide range of temperatures (7–320 K) and oscillatory strain amplitudes (10 −7 −3.5 × 10 −4 ) at oscillatory loading frequencies of about 100 kHz. It has been re…
The potential energy surfaces (PES), energies E , and activation barriers h of elementary reactions of dissociative addition of CH 4 and C 2 H 6 molecules to the Al 12 Ti cluster with a marquee structure in the singlet and triplet states were calculated within the B3LYP approximation of the density functional theory u…
This work addresses the resistivity increase in Cu interconnects with decreasing line width. Recent published resistivity data for Cu interconnect lines is found to be accurately modeled by a fixed surface scattering specularity parameter, p = 0.52, and a grain boundary reflection coefficient, R = 0.43. In this model,…
The influence of compacting pressure on the structure and mechanical properties of sintered ceramics based on weakly crystalline potassium polytitanate with a composition close to K 2 O · 6TiO 2 has been studied. It is established that an increase in the pressure during the uniaxial cold pressing of compacts leads to…
Analogous to multiwalled carbon nanotubes, nitrogen-doped carbon nanotube cups (NCNCs) have been synthesized with defined volumetric parameters (diameter and segment lengths) by controlling the catalyst particle size and the concentration of nitrogen precursor utilized in the chemical vapor deposition (CVD) reaction,…
A series of materials based on the perovskite Ln 0.435 Ba 0.145 Sr 0.4 Fe 0.8 Co 0.2 O 3 − δ system ( Ln = La 1 − x − y Pr x Sm y ) has been characterized as intermediate temperature solid oxide fuel cell (IT-SOFC) cathodes. Among the different La, Pr, and Sm combinations, those containing at a time Sm and La or alter…
In this work, the real component of the relative permittivity and the loss tangent of epoxy resin with and without inorganic nano-fillers are determined by dielectric spectroscopy. The nano-fillers used in this study were alumina (Al2O3), silica (SiO2) and titania (TiO2). The dielectric spectroscopy measurements were…
The use of traditional inorganic fillers and pigments for both filling and coating applications in papermaking may have certain limitations in such aspects as recyclability and combustibility. Novel renewable organic fillers and pigments derived from natural resources can possibly be completely recyclable, combustible…
We report an experimental and theoretical lattice-dynamics study of yttrium orthovanadate YVO4 up to 33 GPa together with a theoretical study of its structural stability under pressure. Raman-active modes of the zircon phase are observed up to 7.5 GPa, where the onset of an irreversible zircon-to-scheelite phase trans…
Nowadays production of natural biodegradable polymer composites is an important research topic on the stage of renewable sources implementation instead of petrochemical sources. In this work, possibilities of processing biocomposites on the base on different types of biopolymers – polylactide (PLA), thermoplastic star…
A indústria alimentar procura constantemente novas estratégias para aumentar o tempo de prateleira dos alimentos. Nos últimos anos, os filmes e revestimentos edíveis têm sido considerados uma das tecnologias com potencial para alcançar tais objectivos, assegurando a segurança microbiológica e a protecção dos alimentos…
采用固相烧结法合成了单相巨介电常数氧化物CaCu3Ti4O12（CCTO）.用阻抗分析仪分析了10—420 K温度范围内的介电频谱和阻抗谱特性，并结合ZVIEW软件进行了模拟.结果表明：温度高于室温时，频谱出现两个明显的弛豫台阶，低频弛豫介电常数随温度升高而显著增大，表现出热离子极化特点；温度低于室温时，频谱表现出类德拜弛豫，且高、低平台介电常数值基本不随温度变化，表现出界面极化特点和较好的温度稳定性.频谱中依次出现的介电弛豫对应于阻抗谱中
A theoretical analysis of size effects in plastically deformed crystals with transverse sizes in micro and nanometer ranges has been performed in the framework of the dislocation-kinetic approach. The analysis is based on the evolution equation of the dislocation density in these crystals and takes into account the ge…
The effect of rubber-wood fiber (RWF) on the mechanical properties of the 50/50 polyvinyl chloride/epoxidized natural rubber (PVC/ENR) blend was investigated over a range of fiber loadings (0 to 30%). The RWF filled PVC/ENR blend was prepared by using a Haake mixer at 150oC mixing temperature, 10 min. total mixing tim…
三维(3D ) 编织了 composites 是一种先进的并且被使用在航空并且太空航行学地更广泛地。3D 的优点，用法，缺乏和编织 composites 被分析的劣势，和改进材料的性质的可能的途径被介绍，也就是说完整的 5-directional 编织了的 3D 的一种新类型 composites 被开发。做这类预先形成的方法被建议。这被指出四步的编织它是最可能的认识到工业化生产几乎没在 composites'properties 上有效果。由分析模拟模型，材料的优点与 3D 4-di- rectional 和 5-directional 材料相比被介绍。最后，一个微结构模型被分析为未来打基础这些 composites 的理论分析。
Nanotechnology is an emerging interdisciplinary technology that has been booming in many areas during the recent decade. Nanostructures are capable of enhancing the physical properties of conventional textiles, in areas such as antimicrobial properties, water repellence, soil resistance, antistatic, anti-infrared and…
Six perovskites were synthesized and characterized by powder X-ray diffraction and cyclic voltammetry on conical electrodes in either air or nitric oxide in argon at 200, 300, and . At , the current densities in air was the highest for the strontium-free cobaltite, whereas the current densities were the highest for in…
This paper presents a reduction technique which was the detailed lumped parameter linear transformer model order as a starting point and allows its reductions to any size of the model order specified by the user. An improved clustering algorithm is employed in the proposed method to obtain the reduced order denominato…