Site partitioning of $Cr^{3+}$ in the trichroic alexandrite $BeAl_{2}O_{4}$:$Cr^{3+}$ crystal: contribution from x-ray absorption spectroscopy
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Materials Literature
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THE SEMIEMPIRICAL MODEL OF THE MULTICOMPONENT BUBBLE BEHAVIOUR IN GLASS MELTS
A semi-empirical model of the bubble growth and dissolution in glasses with a fining agent has been derived. This model applies the experimental data from bubble observation at melting and fining temperatures. The experimental data needed for the model involved the temperature dependences of the average growth rate of…
Photon conversion in Bi3+/Pr3+-codoped CaTiO3.
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Speciation of partly oxidized thiol-organosilica surface
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Effect of Electric Current Pulse on Carbide in Hypereutectic High Chromium Cast Iron
It has significant engineering practicability that refining the carbides as hard phase in hypereutectic high chromium cast iron. The high chromium cast iron samples during the course of solidification were treated with electric current pulse (ECP) from the temperature of 1350 °C and 1360 °C. The effects of ECP treatme…
Nanostructured layered double hydroxide aerogels with enhanced adsorption properties.
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Differentiation of bacterial strains by means of surface enhanced FT-Raman spectroscopy
The silver nanoparticle colloid was used to obtain surface enhanced Raman spectra of Listeria monocytogenes, Salmonela enterica, and Esherichia coli bacteria. The SERS spectra were captured using for excitation the near-infrared (1064 nm) laser radiation with reduced intensity, which ensured the prevention of the fluo…
Study on the Performance of Nano Calcium Carbonate Modified Asphalt Concrete AC-13
To make nano calcium carbonate as the modifier, firstly the best proportion of nano calcium carbonate is determined as 6% by comparing the influences of different proportions of nano calcium carbonate to the indexes of asphalt. Then the influence of mixing with nano calcium carbonate to the performance of asphalt conc…
Theoretical research of correlation of electronic structure with birefringence and anisotropy of TiO2
The crystal structure, the band structure, and the density of states of anatase TiO2 are analysed by using the plane-wave ultrasoft pseudopotential method of the first principles based on the density functional theory. Then we calculate optical properties such as dielectric function, energy loss function, photoconduct…
A Quantum Monte Carlo Study of the Ground State Chromium Dimer
We take variational and diffusion quantum Monte Carlo (VMC and DMC) methods to investigate the chemical binding of the ground state chromium dimer, employing various single determinant (SD) or multi-determinant (MD) wavefunctions multiplied by a Jastrow factor as a trial/guiding wavefunction. The molecular orbitals (M…
New Model for Interlaced Yarns in the Ballistic Impact of Flexible Body Armors
In this work, numerical implementations of a new biaxial fabric of interlaced yarns model for ballistic impact into flexible body armor are presented. First the model is applied to a single-layer panel of polyethylene Dyneema® fibers in a matrix and impacted by various projectile geometries. We obtain the model result…
On the Advanced PVD Coatings for Threading in Austenitic Steel
An effective threading of austenitic steel with HSS taps protected by CrAlN, TiCN and TiN PVD coatings was tested. The chrom-nickel austenitic non-stabilized steel (X5CrNi 18-10), was threaded with the HSS-E M6-6H Narex Zdanice taps at the cutting speed vc=10 m/min, with outer cooling fluid Cimperial HD 801-03 -10%, a…
Experimental Study and Simulation on Compression Character of Warp Knitted Spacer Fabrics
Based on experimental data, the research work on warp knitted spacer fabrics gives compression laws when structural parameters (such as diameter of spacer yarn, areal density, spacer yarn angle and the thickness of spacer fab... | Find, read and cite all the research you need on Tech Science Press
Growth Characteristics of Carbon Nanotubes on Oxidized Catalyst under Low-Pressure Condition
Low-pressure alcohol catalytic chemical vapor deposition (LP-ACCVD), which is an ACCVD method at a lower pressure (<1 Pa) than that in the conventional method, has been attracting much interest because it enables the low-temperature growth of single-wall carbon nanotubes (CNTs). However, the growth rate of CNTs by LP-…
Prediction of Glass Transition Temperature of Polymer by Support Vector Regression
. Based on two quantum chemical descriptors (the thermal energy Ethermal and the total energy of the whole system EHF) calculated from the structures of the repeat units of polyacrylamides by density functional theory (DFT), the support vector regression (SVR) approach combined with particle swarm optimization (PSO),…
Comparison of Direct and Indirect Methods of Tensile Properties Determination for Post-Exposed Power Plant Steels
Long-term exposure at elevated temperatures results in a degradation of the short-term tensile properties of metal that can cause the deterioration in reliability of power equipment. Therefore, in order to avoid unscheduled outages and to guarantee fail-safe operation of equipment periodic control of the tensile prope…
Degradation phenomena of carbonaceous materials in polymer electrolyte fuel cells
In polymer electrolyte fuel cells (PEFCs), many kinds of carbonaceous materials are used as electrocatalyst support, gas diffusionlayer, bipolar plate, etc. These carbons are exposed to a strongly oxidative environment of high electrode potentials,high oxygen concentrations, high temperature, and high water content. T…
Epoxy Resin Surface Functionalization Using Atmospheric Pressure Plasma Jet Treatment
Atmospheric pressure plasma jet (APPJ) of N 2 has been applied to promote adhesion between the epoxy resin post and composite core material due to the chemical active functional groups created. The APPJ was proved to be able to improve adhesive ability of the epoxy resin through the polar groups such as carbonyl group…
Kinetics of Nitrites Adsorption on AB2 Type Hyperbranched Poly(Amine Ester) Modified by Trichloroctadecylsilan
The AB2 type hyperbranched poly(amine ester) (HBPAE) can be used as adsorbent to adsorb nitrite from aqueous solution due to a large number of terminal hydroxyl groups, where the hydrogen-bonds could formed between OH and NO2-. However, the hydrophilic properties of HBPAE limited their utility in the application becau…
Environmental Impacts of Post-Combustion Capture: New Insight
This chapter reports on the propensity of amine-based post combustion CO 2 capture (PCC) solvents to form deleterious nitrosamine compounds in the presence of NO x . The formation and emission of these materials from the PCC process has not been investigated in detail. The entrainment of these degradation products in…