Materials Literature
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The oxidation of urea was studied as a means of remediating urine-rich waste water to produce hydrogen and simultaneously denitrificating the waste water.The proposed reaction mechanisms, preferred pathway and rate determining steps have been predicted using Density Functional Theory calculations.Both the electro-oxid…
The linear and nonlinear optical properties of some ferroelectrics (BaTiO 3 , KNbO 3 , LiTaO 3 and LiNbO 3 ) are studied by density functional theory (DFT) in the local density approximation (LDA) expressions based on first principle calculations without the scissor approximation. Specially, we present calculations of…
The new-domain nucleation by applying a weak electric field is an important process for the ferroelectric domain inversion in ferroelectrics. We studied the process of the new-domain nucleation in ferroelectrics using the classical model, and found that the rate of nucleation in the electric field did not agree with t…
Since furosemide is unstable when exposed to light,an orange-red PTP is used for commercially produced furosemide tablets.However,there are slight differences in the color of the PTP material among manufacturers and the effect of this on the photostability of furosemide preparations has not yet been clarified.With thi…
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Single crystals of Glycine Sodium Chloride (GSC), a semi organic nonlinear optical material has been grown from solution by slow evaporation at ambient temperature. The growth of crystals has been carried out at various pH values and the growth was confirmed at pH 6. The chemical composition of the grown crystals was…
The ambipolar diffusion length and the minority-carrier mobility-lifetime products of microcrystalline hydrogenated germanium thin films, prepared by plasma enhanced chemical vapour deposition, are investigated by using the steady-state photocarrier technique. Different thin film samples were deposited with the diluti…
Ultrasound and benefits of its application in electrochemistry and electroanalysis have been explained and demonstrated. Lead determination by stripping analysis coupled with insonation was used to illustrate advantages of employing ultrasound in electroanalysis. Quantitative analysis of lead under insonation was show…
This paper assesses boiler tube failures (BTFs), especially in boiler water wall tubes (BWWTs) for a natural circulation high-pressure fossil (natural gas) drum boiler unit (TIME-COB-206, Russia). Metallographic (micro and macrostructural) examinations of BWWTs materials (carbon steel, Russia) were carried out extensi…
Pilot plant refining trials show that pressurized high-consistency refining (PHCR) of bleached kraft pulps offers a unique way to produce sheets with high air permeability and good tensile energy absorption (TEA). The high air permeability is ascribed to a low water retention value of fibres which results in less coll…
Zinc peroxide (ZnO2) hollow spheres of 100 200 nm diameter were synthesized by a simple hydrothermal method by using H2O2 and ZnO powder as reagents without the assistance of any surfactant. O2 bubbles in situ generated by the decomposition of H2O2 served as a soft template in the formation of ZnO2 spheres. Zinc oxide…
Ag/SBA-15 nanocomposite was prepared by supercritical fluid deposition (SCFD) method, with AgNO(3) as the precursor and ethanol or glycol as the cosolvent. AgNO(3) was firstly deposited onto the SBA-15 support at 50 degrees C, 23-25MPa, and reacted for 3-24h. The resultant composite was then subjected to calcination a…
The temperature effect on the magnetic property of gamma-ray irradiated Nd-Fe-B and Sr-Ferrite magnets has been investigated. When the permanent magnets are exposed to gamma-ray, it's magnetic and other related properties are declined with degree of dose. The decreased magnetic property by gamma-ray irradiation at low…
In this study, physical properties of poly(vinyl acetate-co-ethylene) (VAE) emulsion were investigated by adding different amounts of di-butyl phthalate (DBP) which is a common plasticizer of VAE. The glass transition temperature of the dried plasticized VAE emulsion film, which measured by Differential Scanning Calor…
On the basis of local density approximation, superposed-neutral-atom model and the finite-difference method （SNA-FD） are used to calculate the positron bulk lifetime and positron monovacancy lifetime in crystals of elements of the periodic table. The distribution of positron wavefunction and positron annihilation rate…
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To investigate the key issues of the liquid metal LiPb blankets,liquid metal LiPb experimental loop is a necessary equipment,and the magneto hydro dynamic(MHD) experiment is one of the important parts for investigation of the LiPb flow characteristics under the magnetic field of the magnetic confinement fusion reactor…
According to the working requirements of hypersonic spacecrafts,reusable space vehicles and next generation rocket engines operating at ultra-high temperature condition,a proposal to improve anti-ablative property of 2D C/SiC composites by introduction of ZrC filler was presented.2D C/SiC-ZrC composites with different…
Study on porous materials is attracting considerable attention in the field of materials science.Mea-suring methods play important roles in studying porous materials.Main methods for measuring the specific surface area,pore volume and the pore appearance of porous materials are introduced,including the small angle X-r…
A new hydroxyapatite(n-HA)-Silk fibroin(SF) bio-mineral material was prepared by using a biomimetic method,with Ca(NO3)2 and Na3PO4 used as the starting reagent to synthesize the inorganic phase.In details,SF was dissolved in Ca(NO3)2 solution without desalting procedure,the compound solution was directly dropped into…