Materials Literature
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In order to obtain highly conductive glass-ceramics containing vanadium bronze, MxV2O5 (M=alkali metal, etc), which is known to have high electronic conductivity, Na2O-V2O5-P2O5 glasses were heat treated to perform crystallization. The dc conductivities of the glasses containing 60 to 77mol% V2O5, in which [Na2O]/[V2O…
Relationship between wet adhesion of paint coating film (paint film) on coated steel (wet adhesion) and stress changes in paint film has been investigated. At the same time, the creation mechanism of ZnO under paint film has been examined.Zn3(PO4)2•4H2O under paint film dehydrates to Zn3(PO4) 2•2H2O with cathodic elec…
The effects of various additives on pH and rates of setting reactions of a commercial zinc phosphate cement system were examined. While the addition of various organic materials to the cement powderproduced no effect on the pH changes, addition of both calcium oxide and calcium hydroxide to the cement powder increased…
Powders containing perovskite type double oxides of the series Pb(Mg1/3Nb2/3)O3-Pb(Zn1/3Nb2/3)O3 as a main constituent have been prepared by firing the batch mixture according to the chemical formulae. It is interesting to know the substitutional solid solubility of ZnO for MgO in this series because the latter end me…
Each of the pale yellow title compounds (1), in toluene and other appropriate organic solvents, cyclises on irradiation at 366 nm to give purple solutions containing a mixture of a thermally unstable, blue 4-substituted 1,8a-dihydro-5,8-dimethoxy-1,1-dimethylnaphthalene-2,3-dicarboxylic anhydride (5) and a thermally s…
To improve an electrical capability of aluminum electrolytic capacitor, a new electrode material of large dielectric constant and high dielectric strength. This thin film electrode of titanium rich aluminum alloy is made with a rapid quench method and has very small grain size of a few micrometers and high toughness.…
The effect of colloidal silica on the [Ru(bpy)3]2+-sensitized photochemical cis-trans isomerization of N-methyl-4-β-styrylpyridinium (cis-MSP+) ion induced by one-electron transfer has been studied. An efficient electron-relay chain reaction has been shown to take place on the colloidal surface, on the basis of remark…
Abstract Electron penetration into the sample in the scanning electron microscope can give rise to bright fringes close to sharp edges in the secondary electron image. This can make it difficult to see details close to the edge. These fringes can be considerably reduced by putting a positive control electrode (CE) bet…
Because the locally favourable structure is globally unfavourable, choles teric liquid crystals are frustrated. Near the isotopic transition, blue phases (BP) appear as compromise structures to relieve this frustration. BPI and BPII are soft, cubic crystals with giant unit cells.
The local hydrogen concentration in the heat-affected-zone where the root cracking occurred has been investigated using the finite difference method. The effect of groove and weld metal shapes on the local hydrogen concentration was basically examined. It is clear that the local hydrogen related with the cold cracking…
The corrosion of cobalt-nickel alloys at ambient temperatures is reviewed. In the aqueous phase, data for the anodic and cathodic half-cell reactions are reported, as also for free corrosion. Under most conditions, corrosion resistance increases with nickel content, although in certain circumstances, the 50–50 wt-% al…
The lattice sites occupied by carbon in B12C3 and B9C are examined in terms of their boron‐carbon nuclear dipolar couplings and chemical shielding anisotropies as revealed by 13C nuclear magnetic resonance spectroscopy. The 13C spin‐echo decays for B9C is more rapid than that of B12C3, which is interpreted as stronger…
In order to clarify the contribution of grain boundary effect on the work-hardening rate without recovery effect, h, and the recovery rate without work-hardening effect, r, these two parameters in pure aluminum single crystals have been measured and compared with those in aluminum polycrystals reported so far. The mea…
Twelve kinds of cellulosic fiber, including natural, regenerated, and chemically modified fibers, were prepared for measuring the moisture sorption and desorption isotherms at various temperatures from 10 to 50°C by two types of gravimetric method, a weighing bottle method and a sorption balance method with quartz spr…
Quantitative analysis by electron probe microanalyzer has been well studied and established. Many methods of quantitative analysis are provided. 1. Working curve method, 2. ZAF method and 3. Bence-Albee method are well known and used. But these methods are not suited to some specimens. 4. Convergence method and 5. SEF…
The molar volume, optical basicity, X-ray fluorescence spectra of Al Kα and X-ray photoelectron spectra of O1s, B1s and Al2p core electrons were measured for alkaline earth aluminoborate (CaBAl and BaBAl) glasses as a function of molar ratio MO/(MO+B2O3)=X (M=Ca and Ba). Inflections and discontinuities in the property…
The kinetics of the reduction by hydrogen of two series of NiO-Fe 2 O 3 mixed oxides of different composition was studied in the temperature range 320 - 410 °C using thermogravimetry. Both series were prepared from different precursors that were thermally decomposed at different temperatures. The oxidizing ability of…
The state of the art of microwave heating and drying of textile materials is discussed, along with the potential for this technology to improve the productivity of the textile industry. A complete search of the literature has revealed the important research and development which has been performed related to microwave…
The effect of heat treatment on the tensile properties and fracture toughness of Ti-10V-2Fe-3Al, a near β titanium alloy, was studied to establish the optimum manufacturing process. Fatigue properties were also investigated using heat treated specimens specified by Aerospace Material Specifications.It is found that ag…
The crystal structure of ε -Mg 2 PO 4 OH ( Pnma , a = 8.239(1), b = 6.135(1), c = 7.404(1) Å, Z = 4) was solved by direct methods and Fourier syntheses and refined to a final R -value of 0.017 for 637 high-angle reflections. Slightly distorted trans -MgO 4 (OH) 2 octahedra form chains along b by edge-sharing, the chai…