Materials Literature
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Strojní zařízení kvasného průmyslu je značně zatěžováno mechanickým opotřebením jednotlivých pohyblivých prvků a korozní degradací. Jedná se především o linky na plnění kegů, lahví, ale i etiketovací stroje. Snahou konstruktérů je tedy nahrazovat klasické oceli korozivzdornými materiály. Cílem příspěvku je porovnat ab…
摘要： 分子电子器件是未来分子电路的微电子元件，已成为有机功能纳米材料研究的热点。 卟啉类化合物的π共轭体系表现出的独特光电性能和良好的热稳定性，使其作为光电器件、模拟生物酶、分子识别和传感材料在材料化学、医学、生物化学和分析化学等领域展现出良好的应用前景，由于卟啉分子平面结构的易修饰性，常用卟啉化合物组装单元来构建功能化的卟啉光电器件。 本文综述了卟啉类化合物的特点及其在光电器件中的应用进展。
It has been demonstrated from various author* that a Si Carbon Nanotube heterojunction can he obtained by growing MultiWall Carbon nanotubcs (MWCVT) over a silicon substrate The electron transport characteristics of hybrid Si-CNT structures have been also largely investigated. Among the wide spectrum of nanotube chara…
The Al/hBN composite coatings were fabricated by atmospheric plasma-spray technology, which were used as an abradable sealing coating for aircraft turbo engines. The Al/hBN composite powders were prepared by spray granulation with polyvinyl alcohol binder (ZLPC), spray granulation with sodium silicate binder (ZLSC), a…
The effects of Dy, Mn alone doping and co-doping on the structural, electrical and ferroelectric properties of BiFeO3 thin films were investigated. (Bi1−x Dy x )(Fe1−y Mn y )O3 thin films, with (x, y) = (0, 0), (1, 0), (0, 1), and (1, 1) denoted by BFO, BDyFO, BFMnO, and BDyFMn, respectively, were prepared by using a…
The structural, electrical, and multiferroic properties of the double-layered (Bi0.95La0.05)(Fe0.97Cr0.03)O3/NiFe2O4 thin film deposited on a Pt(111)/Ti/SiO2/Si(100) substrate by a chemical solution deposition method are reported. The formation of the perovskite-based distorted rhombohedral and spinel phases was confi…
Since 2008, the Idaho National Laboratory (INL) has been developing a next-generation nuclear fuel performance code called BISON. BISON is built using INL’s Multiphysics Object-Oriented Simulation Environment, or MOOSE. MOOSE is a massively parallel, finite element-based framework to solve systems of coupled non-linea…
摘要： 用Winsor相图法研究了自制的6种不同结构的烷基芳基磺酸盐/不同醇/正癸烷/NaCl/水体系在不同温度下所形成的微乳液。 探讨了烷基芳基磺酸盐结构对微乳液相行为的影响。 同时考察了温度和醇对微乳液相行为的影响。 结果表明，随着烷基芳基磺酸盐长烷基链的增长，中相形成盐度S1、中相消失盐度S2、中相盐宽ΔS和最佳盐浓度S*值均减小，最佳中相体积V*M和最佳增容量σ*值均增大；随着烷基芳基磺酸盐分子的芳环向长烷基链中间位置移动，S1、S2、ΔS、S*值均减小，V*M和σ*值均增大；随着温度升高，V*M和σ*值均减小，S1、S2、ΔS、S*值均增大，在25 ℃时，体系无中相微乳液形成；随着正构醇碳原子数的增加，V*M和σ*值均增…
摘要： 以过氧化苯甲酰为引发剂，采用溶液共聚法在不同温度下合成了一系列苯乙烯-马来酸酐共聚物，经磺化制得不同相对分子质量的聚苯乙烯-马来酸酐磺酸钠(SSMA)。 通过测定平均粒径、Zeta电势、黏度等考察了SSMA对20%除虫脲悬浮剂分散稳定性的影响。 结果表明,最佳分散剂为75 ℃聚合得到的SSMA，其质量分数为3%时，水悬浮剂的分散稳定性最好；当pH=9时SSMA分子完全电离，能为颗粒提供较大的空间势垒，水悬浮剂分散稳定性最好；Na+或Ca2+压缩颗粒界面的双电层，降低Zeta电势的绝对值，使颗粒因带电量减少而聚结，导致水悬浮剂分散稳定性变差；当离子浓度相同时，Ca2+的聚沉能力强于Na+，添加Ca2+后的水悬浮剂的分散稳定性…
The monodispersed BaTiO3 nanocrystals have been synthesized by one-step solvothermal method. The average particle size of BaTiO3 powders is as small as 5 nm with a narrow size distribution. Using this powder, 5nm bulk dense Nano ceramics have been prepared by pressureless two-step sintering method. The microstructure,…
To support the safety analysis of the conversion of the BR2 research reactor to low-enriched uranium (LEU) fuel and extend the validation basis of the RELAP code for the analysis of the conversion of research reactors from highly enriched (HEU) fuel to LEU, the simulation of BR2 tests A/400/1, C/600/3, and F/400/1 was…
The paper describes technology of the LTCC structure which enables light absorbance measurements of liquid sample. The manufactured ceramic structure contains buried microfluidic channels. The structure consists of two co-fired glass windows which separate the light source and detector from the test solution. A constr…
Aerogels are the lightest insulation materials known today with a thermal conductivity in the range of 0.001- 0.03 W/K. The first patent concerning silica aerogel dates back to the 1932, but the first aerospace application was realized many years after, in 2003, when aerogels were selected as thermal insulation to rea…
The reaction of CdCl 2 ·2H 2 O with temozolomide (TMZ) affords the complex [Cd(TMZ)Cl 2 ] n , whose structure has been characterised by IR spectroscopy, elemental analysis and X-ray single crystal diffraction analysis. It crystallises in the orthorhombic system and space group Pbca, with a = 17.491(4), b = 6.8100(14),…
A 1 T -TiSe 2 surface is studied by means of scanning tunneling microscopy (SMT) and X-ray photoelectron diffraction (XPD). The diffraction patterns were modeled in the multiple electron scattering approximation using the EDAC code. Variants of the point and structural defects on the 1 T -TiSe 2 surface are considered…
Fe(x)Ag(100-x) granular thin films, 25 < or = x < or = 40, have been prepared by DC-Magnetron sputtering deposition. These samples are composed of small Fe nanoparticles (2.5-3 nm) embedded in an Ag matrix, and their size remains nearly constant with increasing Fe content. A crossover in the collective magnetic behavi…
A mechanism of unidirectional exchange anisotropy formation at thermo-magnetic treatment of permalloy-manganese bilayers has been studied. A shift of hysteresis loops appears at annealing beginning from 230 degrees C. The maximal exchange field of 155 Oe is reached after the 250 degrees C annealing for 2 h. As demonst…
We present an analytical treatment of diffusional release of a dispersed solute from a cylindrical non-erodible polymeric matrix and study the mechanism of diffusional release of solute from the matrix system as a function of solute loading parameter. The diffusion equation is solved exactly under perfect sink conditi…
Reaction of the rigid ligand 2,3,5,6-tetraiodo-1,4-benzenedicarboxylic acid (H 2 BDC–I 4 ) with Ni II chloride in different solvents affords two coordination polymers {[Ni(BDC–I 4 )(MeOH) 4 ](H 2 BDC–I 4 )(MeOH) 2 } n and {[Ni(BDC–I 4 )(DMF) 2 (H 2 O) 2 ] (DMF) 2 (H 2 O)} n . Both complexes have one-dimensional, linea…
Using principle of minimum total potential energy approach in conjunction with Rayleigh-Ritz method, the electro-thermo- mechanical axial buckling behavior of piezoelectric polymeric cylindrical shell reinforced with double-walled boron-nitride nanotube (DWBNNT) is investigated. Coupling between electrical and mechani…