Materials Literature
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The water-soluble tetracationic meso-tetra(4-methylpyridyl)porphine (PO2) was incorporated in mixed Langmuir monolayers (LM) with the anionic surfactant sodium hexadecylsulfate (SHS) and stearic acid (SA). The stability of the monolayer and the molecular packing of PO2 vary with the surface pressure and amount of stea…
Corrosion behavior and mechanism of Al-10% Si alloy-coated steel produced by a melt-dipping method have been investigated in methanol containing NaCl, and HCOOH as contaminants. Immersion corrosion tests were performed in deaerated or aerated methanol with and without 0.1-30% 0.1% NaCl, and 0.1% HCOOH, and ex situ sur…
A basic problem of electrochemical engineering is the calculation of the shape of an electrochemical cell necessary to apply an arbitrary current distribution on a prescribed electrode geometry. However, despite practical interest, it appears that this problem has never been addressed theoretically. In this work, a nu…
Electrical double layer and electrochemical characteristics at the nanoporous \ncarbon | (C₂H₅)₄NBF₄ +acetonitrile interface have been studied by \nthe cyclic voltammetry and impedance spectroscopy methods. The value \nof zero charge potential (0.23 V vs. SCE in H₂O), the region of ideal polarizability
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Abstract Phenol blue is a merocyanine dye that may exist in resonance between two extreme forms, a neutral keto form and a zwitterionic, charge‐separated eno form. The keto form is stable in the gas phase, while the eno form can be stabilized by solvents. In this work, the bond‐length alternation is used to monitor th…
The control of crystal size and morphology in a potassium dihydrogen phosphate batch crystallization process is investigated. The process is represented by a multidimensional population balance and related differential-algebraic equations. These equations, solved using a high resolution method, are the basis for an op…
We investigate the non-trivial magnetization plateau at 1/4 of the saturation magnetization of S=1 spin ladder, especially with reference to recent experimental results on a new organic tetraradical 3,3',5,5'-tetrakis(N-tert-butylaminoxyl)biphenyl, abbreviated as BIP-TENO. We propose three mechanisms for the formation…
Thermodynamic analyses for the system ZnS:Ag (crystal)–S2(vapor) is performed. It turned out that it is impossible to receive hole conductivity in this system. In our experiment ZnS crystals covered by silver layer are silver doped by the mechanism of atom recoil during S+ ion implantation. The resistivity of obtained…
Lanthanum manganite, the air electrode material of solid oxide fuel cells, is well known for its complicated nonstoichiometry, which depends upon oxygen partial pressure and temperature. This nonstoichiometry has a relationship with electrode reactivity or the exchange current density because it affects the oxygen act…
The electrochemical impedance for infinite and finite diffusion processes was described, and the locus of the impedance was discussed through comparison of the experimental results with the theoretical ones. The charge transfer resistance Rct and the polarization resistance Rp were compared with the current i and the…
Intergranular and internal oxidation in slab reheating process for hot-rolling was investigated for ultra-low carbon steel with 0.01 mass% Si. Intergranular oxidation depth significantly increased at 1 473 K because of melting of Fe–Si–O complex oxides and decreased with increasing oxidation temperature at above 1473…
Six aluminum hydroxide adjuvants, poorly crystalline aluminum oxyhydroxide (AlOOH) were prepared using different thermal treatments of amorphous aluminum hydroxide (Al(OH)3) in an effort to increase the protein adsorption capacity. All of the adjuvants initially exhibited a higher protein adsorption capacity. However,…
This paper describes the method evaluating the appearance of fabric-wrinkling replicas objectively by image processing. Results indicate that the wrinkle can be reliably measured using the distribution of gray level and the ratio of surface area, the ratio of X-direction length and the one of Y-direction length of sur…
The characteristics of the reaction between hydrogen isotopes and uranium were investigated using depleted uranium from nuclear fuel manufacturing waste. Activation of the uranium was conducted by heating the experimental vessel to 450 ℃ under vacuum conditions, while the reaction temperature was room temperature. The…
The surface area of the individual phyllosilicates (clay minerals) in Athabasca oil sands determined from XRD crystallite size measurements was found to be comparable to the bulk surface area measured by ethylene glycol monoethyl ether adsorption. The primary phyllosilicates are kaolin and illite but the large surface…
The process of grain growth in ultrafine-grained nickel was studied using differential scanning calorimetry. Samples of nickel, with mean grain sizes in the range from 100 to 400 nm, were prepared by equal-channel angular pressing, high pressure torsion or combinations of both. It is shown using differential scanning…
A realistic non-spherical model for bubble formation in a co-flowing liquid is presented. In the model, an interfacial element approach is applied to describe the dynamics of bubble formation. The effect of flowing liquid velocity is modeled by a combination of the bubble axis translation and liquid pressure analysis…
Improvement of the corrosion resistance of refractories is required critically, since Al2O3 based conventional refractories used for incineration at the power generation plants are seriously corroded by the molten oxide mixture. In this study, the effect of the addition of Cr2O3 to Al2O3 on the corrosion resistance, a…
Because of the semitransparency of pBN in the infrared spectral region, the heat flux within this material does not only depend on its solid thermal conductivity, but also on its radiative properties. In order to characterise the heat transfer in pBN samples, the thermal and infrared optical properties were determined…
Analytical electron microscopy (AEM) was used to study the separate effects of the irradiation parameters on the evolution of the microstructure in recrystallized alpha-annealed Zircaloy-4 under controlled irradiation conditions. The effects of fast neutron flux from ∼4 × 1013 n/cm2-s to ∼1.5 × 1014 n/cm2-s (E &gt…