Materials Literature
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A l’interface de nombreuses specialites de la chimie et de la physique (electrostatique, hydrodynamique, chimie moleculaire), l’electrochimie est en continuelle evolution. Ce manuel presente les principaux concepts de la discipline.Dans cette nouvelle edition actualisee, un chapitre traite des methodes a modulation de…
Variations to synthetic conditions and reaction components were explored to understand the factors that influence framework assembly in monovalent metal-organic frameworks synthesized from the polydentate ligand hydrotris(1,2,4-triazolyl)borate, [BH(trz)3]-. The role of solvothermal conditions, monovalent metal counte…
One possible way to improve competitiveness of paper materials is through utilization of nanocellulose to achieve new properties or to reduce production cost. Several studies have shown that nanofi ...
以水为溶剂在室温条件下制备出大小为500 nm的[Co（Im）2]∞晶体,粒径分布比较均匀,适宜作为成膜的晶种.利用二次生长法在大孔管状α-Al2O3载体上制备致密连续的[Co（Im）2]∞膜,并考察了成膜时间、合成液浓度对成膜的影响.采用SEM,XRD和单组分气体测试对膜的形貌和气体分离性能进行表征.通过SEM显示[Co（Im）2]∞膜无缺陷,膜层厚度约为9 μm.由单组分气体渗透测试可知,室温条件下H2的渗透通量达到1.1×10-8 mol/（m2·s·Pa）,H2/CO2,H2/N2和H2/CH4的理想分离系数分别7.8,9.1和7.9,超过努森扩散系数.
The Polyfuran belong to an important class of conjugated systems whose electronic properties strongly improve under doping. In the present paper, theoretical analysis of the molecules of oligofurans has been reported. The methodology adopted is based on DFT (B3LYP/ 6-31(G) (d) calculations. The electronic, electrochem…
ZnO nanostructure film was fabricated by wet chemical deposition method in this research.. The effects of Zn2+ concentration on structural and morphology of ZnO films were firstly investigated in detail by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). After that ZnO nanorod films were studied to asse…
The functional and mechanical properties of a material are often determined by the defects in them. A thorough understanding of the relationship between the defects and the properties allows for tailoring a material’s properties into the desired combinations. Amongst the different classes of defects, experimental iden…
Roads and railroads are important and essential transport systems for our everyday life. It is important to continue the development to create greater understanding of how these constructions are affected by degradation to not build long life constructions that are not fulfilling tomorrow’s changed demands. In constru…
When the wave processes in bounded elastic bodies are examined, we are faced with a significant complication of the structure of the wave field compared to the case of infinite bodies. This is due to the complex nature of the reflection of elastic waves from the boundaries of the body because the direction of the gene…
以PbO作助熔剂采用高温溶液法生长出Pb（Mg1/3Nb2/3）O3弛豫铁电晶体,利用X线衍射仪（XRD）和扫描电子显微镜（SEM）分析了晶体相结构和生长形貌。研究结果表明,采用高温溶液法生长出纯钙钛矿相结构的Pb（Mg1/3Nb2/3）O3弛豫铁电晶体,晶体多为淡黄色,较小的呈赝立方形态,较大晶体逐渐趋于不规则形态,最大尺寸达4mm×4mm×3mm。晶体中存在位错蚀坑和PbO包裹等生长缺陷,生长过程中的温度波动和成分起伏等因素导致这些缺陷的出现。晶体{100}面生长速率最慢能成为热力学上稳定存在的自然显露晶面,晶体的生长机制为二维成核层状生长。
Solution combustion synthesis (SCS) with its origin at IPC department of IISc has been widely practiced for synthesis of oxide materials. It is simple and low cost process, with energy and time savings that can be used to produce homogeneous, high purity, uniformly doped, nano crystalline ceramic powders. The powders…
Приведена структурная схема и описана калибровка динамических гониометров, предназначенных для определения параметров цифровых преобразователей угла. Показано, что устранение нестационарности случайной погрешности при помощи фильтрации верхних частот позволяет определить поправки к результатам измерений и снизить в по…
In this thesis,amine side groups carrying polyester copolymer of poly(d,l-lactic acid-co-serin-NH2)(PLA-SERAm) was synthesized. The synthesis of PLA-SERAm copolymers were carried out into the two stages chemical study. First, poly(lactic acid-co-boc-d-serine)(PLA-SER) copolymers were synthesized by condensation polyme…
Der verstarkte Einsatz hoherfester Stahle und Zusatzwerkstoffe erfordert ein vertieftes Verstandnis der Zusammenhange zwischen Schweisverfahren, Warmeeinbringung, Abkuhlbedingungen sowie den daraus resultierenden metallurgischen Vorgangen in der Schweisnaht und deren Umgebung. Nur aus dem Zusammenwirken aller Einfluss…
SnO2 (x) – ZnO (1-x) binary system with two different SnO2 composition (x= 3, 5 mol%) were prepared by solid state reaction at high temperature employed as photoanode for dye sensitized solar cell(DSSC) fabrication. SnO2-ZnO binary oxide was characterized by X-ray diffraction(XRD) and UV-VIS Spectroscopy to examine th…
Розглянуто особливості розподілення за розмірами та складом неметалевих включень у металі швів у разі введення у зварювальну ванну нанооксидів алюмінію. Встановлено, що неметалеві оксидні включення розміром до 0,3 мкм можуть слугувати центрами зародження голкових форм фериту і визначати умови формування мікроструктури…
Mechanical drop test scenarios for Type B (U) packages according to the IAEA regulations have to be carried out onto the so-called “unyielding target” (usually with cask impact limiters) and onto the puncture bar respectively. They are predefined and do not require any further investigation of scenarios that really co…
Marked a decisive influence on the durability of concrete structures operating in aggressive chloride-containing environments, corrosion damage valve causing debonding it with concrete and, as a consequence, the formation of corrosive longitudinal cracks in the protective layer of concrete. Emphasizes the lack of scie…
Nano composite materials consisting of gold nanoparticles (AuNPs) and functionalised multiwalled carbon nanotubes (fMWCNTs) were initially prepared using simple synthetic reduction methods, involving the chemical agents sodium borohydride and trisodium citrate. These composites were named fMWCNT-Aunano(NaBH4) and fMWC…
Study of tribological properties of nickel-basedcoatings reinforced by TiO2 nanoparticles produced by pulseelectrodeposition