Materials Literature
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This presentation describes one effect of using density dependent melt temperature and shear modulus in calculations with the Preston, Tonks and Wallace (PTW) Strength Model to simulate lab experiments. Calculations are in error if density dependent melt and shear functions are inconsistent with a PTW parameter set fo…
The article deals with manufactured electrode materials for lithium secondary batteries - nanostructured Li4Ti5O12. Material was chosen for research by virtue of very good intercalation / insertion characteristics, possibility utilization high charge and discharge rate and for his environmental safety.
In the present work, we confectioned light emitting SiOx (x<2) samples using reactive sputtering. By controlling the oxygen concentration in the deposition chamber (range from 0.5% up to 10), an excess of silicon was created in the formed silicon oxide films. Only after a thermal annealing (temperatures from 1050ºC to…
A simple and straightforward theoretical model is developed to investigate the elastic constants for ionic solids under the effect of temperature. The calculation are performed with the help of high temperature equation of state (EOS) derived from Tallon's method based on thermodynamic analysis. The results obtained f…
本发明为一系列高能量密度高放氢速率的水解制氢用铝基复合材料的制备。这种复合材料是在基体铝-铋-氯化钠复合材料的基础上，通过添加少量碱金属(Li、Na、K)和LiAlH4、LiBH4、NH3BH3等氢化物得到性能更佳的制氢材料；Al-Bi-NaCl复合材料与添加剂碱金属或氢化物的质量配比为100∶0.1-5。制备方法如下：按比例分别称取所需的各种原料粉末加入钢制球磨罐中，在QM-3SP2行星式球磨机上高速球磨，球磨罐中充入氩气保护，得到成分均匀的高活性制氢材料。本发明制备工艺简单，原料成本低廉，具有很高的能量密度和放氢速率，适用于车载实时供氢等方面的应用。
Multi-walled carbon nanotubes (MWCNTs) were grafted with sulfonyl chloride groups using chlorosulfonic acid as a sulfonation reagent, and then the amino-modified multi-walled carbon nanotubes of MWCNT-NH2 was prepared via the aminolysis reaction. The MWCNT-NH2 was further reacted with copper phthalocyanine sulfonyl ch…
In the present work we report the production and characterization of Bi2O3-WO3-TeO2 (BWT) thin films with Au nanoparticles. RF co-sputttering technique was used for the deposition of the amorphous films on substrates. A target of BWT was RF-sputtered simultaneously with pure Au target using argon plasma; O2 flow was a…
Porous anodic alumina (PAA) films have been fabricated by single-step anodization for different concentrations of oxalic acid. The influence of the molar concentration on their average pore diameter was investigated and chemical etching processes for different times on the as-etched layer was performed in order to stu…
In the 625-740 К temperature range on ceramic composition for 89 mol.% ZrO2 + 10 mol. % Sc2O3 + 1 mol. % CeO2 the jump in ionic conductivity was experimentally detected by a factor of ten with temperature increase. Disconnectedness of indicated anomaly with polymorphic transformation was established by method of X-ray…
In this work, the design and fabrication of a low f-number cylindrical microlens array is presented. The lenses were fabricated in thick photo resist of 12 μm thickness, using a contact printer exposure through a mask with a repetitive 6 μm line - 4 μm space pattern. Numerical calculations based on scalar diffraction…
Este trabajo tiene por objetivo principal la construccion de un banco de pruebas experimental de ensayos de fatiga para que estudiantes puedan ampliar de manera experimental su conocimiento en el area de la mecanica de la fractura. Este trabajo se enfoco en cumplir los siguientes objetivos complementarios: Construccio…
Nowadays, nanofibrous layers are intensively studied for their unique properties and potential applications. For instance medical applications like tissue engineering use fibres as a carrier of the cells. The advantage of the nanofibrous layers is a high specific surface area together with high porosity and fibre diam…
The geometry optimization, the electronic and magnetic properties of the compound Ni4NdB are studied by using first-principles within the local spin-density approximation (LSDA) and the LSDA+ U approximation. The results indicate that the system is a metallic conductor with very small band gap, and that the total magn…
利用显微CT针对自愈合2DC/SiC复合材料高温蠕变试验前后的内部孔隙率进行了分。析结果表明,显微CT技术能较好地探测高温蠕变前后2DC/SiC复合材料内部孔隙率变化,从孔隙率的变化初步证实了BxC组元对2DC/SiC复合材料有一定的自愈合作用。利用显微CT技术证实了高温下的拉伸应力不会导致2DC/SiC复合材料中新的裂纹产生。
TiAl-alloys exhibit complex microstructures, which involve in so called “lamellar” or “duplex” alloys as characteristic feature grain like lamellar colonies with lamellae consisting of alpha2-Ti3Al and gamma-TiAl and, depending on composition, processing route, and thermal treatment possibly additional grain structure…
通过等离子增强化学气相沉积(PECVD)法, 以氨气和硅烷为反应气体, P型单晶硅和石英为衬底, 低温下(200℃)制备了含硅纳米粒子的非化学计量比氮化硅(SiN x )薄膜. 经高温(范围500~950℃)退火处理优化了薄膜结构. 室温下测试了不同温度退火后含硅纳米粒子SiN x 薄膜的拉曼(Raman)光谱、光致发光(PL)光谱及傅立叶变换红外吸收(FTIR)光谱, 对薄膜材料的结构特性、发光特性及其键合特性进行了分析. Raman光谱表明. SiN x 薄膜内的硅纳米粒子为非晶结构. PL光谱显示两条与硅纳米粒子相关的光谱带, 随退火温度的升高此两光谱带峰位移动方向相同. 当退火温度低于800℃时, PL光谱峰位随退火温度的…
DC magnetic field applied to Fe₃O₄; nanoparticle suspension affects its light scattering. Time dependent variations in the light intensity transmitted through a suspension are observed after the magnetic field is switched-on. Two types of variations can be distinguished. Fast response takes less than millisecond while…
[1801-77-0] C2H5Cl2O2V (MW 182.91) InChI = 1/C2H5O.2ClH.O.V/c1-2-3;;;;/h2H2,1H3;2*1H;;/q-1;;;;+3/p-2/fC2H5O.2Cl.O.V/h;2*1h;;/qm;2*-1;;m/rC2H5Cl2O2V/c1-2-6-7(3,4)5/h2H2,1H3 InChIKey = DBFQWXKLCGFERX-PVPCXMFZCN (Lewis acid capable of one-electron oxidation; effects oxidative cleavage and oxidative coupling reactions) Ph…
The features of spectral properties of the Jones matrix model of the dominant deterministic polarization transformation for inhomogeneous elliptic birefringent medium have been studied. It is shown that in the case when azimuths of linear dichroism and linear birefringence are coincide the arbitrary Jones matrix can n…
[4388-22-1] C12H10O4S3 (314.40) InChI = 1S/C12H10O4S3/c13-18(14,11-7-3-1-4-8-11)17-19(15,16)12-9-5-2-6-10-12/h1-10H InChIKey = YQUSJUJNDKUWAM-UHFFFAOYSA-N (reagent used as a source of electrophilic sulfur in the synthesis of aromatic sulfides1, 2 and in the ring annelation of biaryls and biheteroaryls to form a thioph…