Materials Literature
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This work presents systems analysis results of an integrated gasification fuel cell (IGFC) combined cycle with carbon capture. The study assumes the use of an atmospheric pressure solid oxide fuel cell. The efficiency, carbon capture potential, and water consumption rates are evaluated and compared to another advanced…
Optical and electrical properties of diamond-like carbon (DLC) films deposited by pulsed laser ablation of graphite target at different substrate temperatures are reported. By varying the deposition temperature from 400 to 25° C, the film optical transparency and electrical resistivity increase severely. Most importan…
Magnetic transitions from the paramagnetic state to an incommensurate magnetic structure and then to an ordered phase with long-range antiferromagnetic order in RMn 2 O 5 (R is a rare-earth ion) oxides are analyzed. It is shown that a transition from the paramagnetic to the incommensurate phase is associated with exch…
The automated building of a protein model into an electron density map remains a challenging problem. In the ARP/wARP approach, model building is facilitated by initially interpreting a density map with free atoms of unknown chemical identity; all structural information for such chemically unassigned atoms is discarde…
Abstract Poly(propylene) (PP) reinforced with short glass fiber was modified with precipitated nanosilica (pnS) by melt mixing. The weight of the glass fiber was varied by keeping the pnS at optimum level. The properties of the composites were studied using universal testing machine, dynamic mechanic analyser (DMA), d…
Under torsion and beyond the buckling point, multi-walled carbon nanotubes (MWCNTs) develop a periodic wave-like rippling morphology. Here, we show that torsional rippling deformations can be accurately described by a simple sinusoidal shape function. Combining this observation with the geometry optimization, we devel…
Abstract The aims of this study were to obtain accurate structural information on the dimethyl sulfoxide (DMSO) and dimethylselenoxide (DMSeO) kaolinite intercalates, paying close attention to the hydrogen-bond geometries, and to provide a detailed interpretation of the individual vibrational modes of intercalates und…
Abstract: Problem statement: The Barat-Algaof kaolin deposits are characterized and evaluated for its potentials as an industrial raw material. Approach: This research studied the total mineralogical composition of the kaolin deposit, chemical and physical properties as well as intercalation of kaolinite by urea. Usin…
Very little is known on the chemical nature of the deep trapping centres that play a role in charge storage in insulating polymeric materials. The analysis of the luminescence emitted during a process of charge recombination can be helpful to unravel the nature of such centres. The spectral features of the luminescenc…
The present studies highlight some efforts to implement state of the art non-destructive testing (NDT) methods to certify the integrity of a typical ceramic matrix composite (CMC, e.g. C/SiC) material as well as its components. These methods include infrared thermography, X-ray radiography and industrial computerised…
用化学共沉淀法合成了6~12 nm的超顺磁性Fe<sub>3</sub>O<sub>4</sub>纳米晶体, 在室温下用3-氨丙基三乙氧基硅烷(APTES)对其表面氨基化, 然后加入Frens法合成的金溶胶, 自组装制备了磁性Fe<sub>3</sub>O<sub>4</sub>@Au复合纳米粒子. 用透射电子显微镜(TEM)、紫外可见吸收光谱(UV-Vis)、傅里叶变换红外光谱(FT-IR)、震动样品磁场计(VSM)等方法对合成的金磁微粒的表面形貌、光学、结构、磁性质等进行表征. 结果表明, 合成的金磁微粒粒径分布均匀, 在15~20 nm, 磁响应性好. 金磁微粒有超顺磁性和易与生物分子结合的特点, 以葡萄糖氧化酶(GOx)为…
Doping of various oxides can greatly modify the high-frequency magnetic and dielectric properties and, therefore, significantly influence the impedance matching and bandwidth characteristics of BaCoZnFe16O27ferrite/epoxy composites. The experiments show that composites doped with V2O5and IrO2+V2O5are potential candida…
( Ba 0.6 Sr 0.4 ) TiO 3 (BST) thin films were deposited on (100) and (110) oriented LaAlO3 (LAO) single-crystal substrates by radio-frequency magnetron sputtering system, respectively. X-ray diffraction θ-2θ and Φ-scans results showed that the BST thin films grown on LaAlO3 (100) displayed (h00) preferred orientation,…
Using a dedicated scanning electron microscope, operating in the spot mode, the charging properties of muscovite mica have been studied in the energy range of 100–8000 eV. The intrinsic yield curve σ0(E), representing the variation of the yield of the uncharged material with the energy E, has been established: the max…
Transgranular stress corrosion cracking (TGSCC) of carbon steel pipelines occurs on buried transmission lines that are protectively coated and subjected to cathodic protection. Analysis of failed pipelines and previous research suggest that hydrogen is involved in the cracking process. The objective of this research w…
Three piperidin-4-one oxime derivatives viz. 3,5-dimethyl-2,6-diphenyl-piperidin-4-one oxime (DDPO), 3-ethyl-2,6-diphenyl-piperidin-4-one oxime (EDPO), and 1-methyl-3-isopropyl-2, 6-diphenyl-piperidin-4-one oxime (MIDPO) were synthesized. Corrosion inhibiting ability of these compounds in 1 M HCl was studied using wei…
High-quality calibration data sets are required when diatom assemblages are used for monitoring ecological change or reconstructing palaeo-environments. The quality of such data sets can be validated, in addition to other criteria, by the percentage of significant unimodal species responses as a measure of the length…
Abstract The crystal structures of K 4 BaSi 3 O 9 and K 4 CaSi 3 O 9 have been characterized by X‐ray diffraction techniques as well as Raman spectroscopy. The structure of K 4 CaSi 3 O 9 has been refined from powder diffraction data via the Rietveld method using polycrystalline material prepared from solid state reac…
Abstract Solvothermal reaction of [MnCl 2 (terpy)] with elemental As and Se at a 1:1:2 molar ratio in H 2 O/trien (10:1) at 150 °C affords the linear trimanganese(II) complex [{Mn(terpy)} 3 (μ‐AsSe 4 ) 2 ] ( 1 ). The tridentate [AsSe 2 (Se 2 )] 3− anions of 1 chelate the terminal {Mn(terpy)} 2+ fragments and bridge th…
The crystal structure of mereheadite (monoclinic, Cm , a = 17.372(1), b = 27.9419(19), c = 10.6661(6) Å, β = 93.152(5)°, V = 5169.6(5) Å 3 ) has been solved by direct methods and refined to R 1 = 0.058 for 6279 unique observed reflections. The structure consists of alternating Pb–O/OH blocks and Pb–Cl sheets oriented…