Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The reaction of Ta metal with potassium nitrate melts at 600 o C has been studied. It was established that the composition of the reaction product could be varied by an appropriate choice of the base-acid properties of the melt, which were regulated by additions of potassium hydroxide. Pure potassium metatantalate KTa…
Supercapacitors in parallel with lead-acid batteries provide greater capacity in lesser volume; cold cranking improves. Lower effective series resistance (ESR) gives greater net capacity. Laboratory experiments and road tests on reduced-volume batteries ganged with supercapacitors demonstrate the practical and economi…
SnO 2 -doped Si nanorings with an outer diameter of 25 nm and an average width of 5 nm are grown by pulsed laser deposition. Atomic force microscopy reveals several interesting self-assembling forms of polycrystalline as well as an amorphous type of silicon nanorings. Depending on the width of the ring, the optical ba…
Among the many reasons for the failure of high-voltage apparatus, the knowledge about a possible leakage of SF6 gas in the switchgear encapsulation is of crucial importance. It is therefore necessary to monitor the SF6 gas to increase system reliability and to address the concerns of growing environmental awareness. T…
−1 . The absence of boroxol ring (806 cm −1 ) in the present glass system suggested that these glasses consist of randomly connected BO3 and BO4 units. The conversion of BO3 to BO4 and VO5 to VO4 tetrahedra along with the formation of non-bridging oxygen’s (NBOs) attached to boron and vanadium takes place in the glass…
The transmittance is studied for a Cantor-like multibarrier system. The calculation are made in the framework of effective mass theory. Some typical values of effective masses and potentials are used in order to have an experimental reference. The techniques of Transfer Matrix are used to calculate the transmittance o…
BHS, Bridge High-performance Steels, produced by the recent advanced steel making technologies such as thermo-mechanical control process were developed. The BHS contribute to the economical design, efficient fabrication and higher performance of steel bridges. BHS has excellent properties such as high strength, high f…
After two decades since the discovery of the high- T c copper oxides, we have been gifted a new option for finding higher T c superconductors. The new high- T c iron-based compounds apparently belong to an entirely different class of materials from the `old' cuprates. Nevertheless, several similarities between the two…
Abstract The synthesis and characterization of three new porphyrin‐peptidyl‐phosphonate derivatives, containing a diphenyl 3‐pyridylmethyl‐phosphonate moiety, is described. These compounds could serve as potential photosensitizers for the PDT method of tumor therapy and displayed activity as inhibitors of aminopeptida…
The availability of cheap and reliable supply of electrical energy plays very important role in the economic development and social welfare of any society. Overhead power transmission lines cross regions which are different in environmental conditions. The reliable and uninterrupted operation of modern power system de…
Effective utilization of biomass resource rapidly has been promoting since the government adopted the ‘Biomass Nippon’ strategy at a cabinet meeting in 2002. Especially, the energy conversion technology of applying biomass has been expected from a point of view of environment and resource conservation. However, the en…
The structure of sodium lead apatite Na2Pb8(PO4)6 has been determined using single-crystal X-ray diffraction. Crystal data are: hexagonal, space group P63/m, Z = 1, a = 972.1(4) pm, c = 718.6(5) pm, V = 588.1(5) 106 pm3, and R = 0.038. The result of charge distribution analysis confirmed the structural hypotheses.In t…
Due to their low density, high specific strength, and electromagnetic interference shielding, magnesium alloy sheets are increasingly used in automotive and electronics industries. However, magnesium alloy sheets are usually formed at an elevated temperature due to poor formability at room temperature. For the industr…
It is considered that the total performances of porous carbon materials have been appraised almost entirely by the factors of specific surface area and pore-size and its distribution, while little attention has been paid on the problems focused among the interface chemistry and physico-chemical nature of the surface o…
A compressive split-Hopkinson pressure bar is used to investigate the dynamic deformation behaviour, fracture characteristics and microstructural evolution of high-strength weldable aluminum scandium (Al-Sc) alloy at strain rates ranging from 1.3×103 s−1 to 5.9×103 s−1 under room temperature conditions. The stress-str…
Random substitutional Ti 2.08 Zr exhibits zero Bragg scattering and alloys with this nominal composition are therefore used to fabricate pressure cells for neutron scattering measurements. Because Ti and Zr alloys are well known to be subject to hydrogen embrittlement, the embrittlement of Ti 2.001 Zr by deuterium gas…
The arc discharge method was the first method developed for producing multiwalled carbon nanotubes (MWNTs). Generally, this method is carried out in low-pressure He gas or other neutral atmospheres, which requires the use of sealed reaction chambers and vacuum equipment. At high temperatures, the method produces well-…
The heat treatment parameters of AZ64 magnesium alloy have been optimized using thermal analysis, scanning electron microscopy and X-ray diffraction techniques. The thermal analysis result revealed that two precipitation reactions took place during the solidification of AZ64 alloy. Therefore, a two-step solution heat…
Hexagonally highly ordered monolithic mesoporous silica and aluminosilicate composites (HOM-2 and Al/HOM-2, respectively) were used as adsorbents for removal of aniline in aqueous solution. These HOM-adsorbents were fabricated by using a simple, reproducible and direct synthesis strategy in which instantly preformed l…
We measured the amount of hydroxyl radicals and sonoluminescence to investigate the condition of ultrasonic cavitation. The generation of OH· radicals and sonoluminescence upon ultrasonic radiation occurred with the same trend at various concentrations of N2 and O2 in water, so we found that sonoluminescence can be us…