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Vol 469, No 1 (2016)
- Year: 2016
- Articles: 4
- URL: https://journals.rcsi.science/0012-5016/issue/view/9198
Physical Chemistry
Changes in the phase composition of oxide layers produced by microarc oxidation on Al–Si and Mg alloys induced by additions of SiO2 nanoparticles to the electrolyte
Abstract
In oxide layers produced by microarc oxidation on Al–Si- and Mg-based alloys, addition of nano-dispersed silicon dioxide to the electrolyte was found to cause a shift in the phase composition toward high-temperature phases and ultra-high-pressure phases. For the first time, ultra-high-pressure phases were detected in oxide layers formed by microarc oxidation on AK6M2 alloy (stishovite) and commercially pure magnesium MG96 (wadsleyite).
93-96
Solid-to-liquid and gas-to-liquid transformation of alkanes under accelerated electron beam irradiation
Abstract
A zero-waste method has been suggested for radiation-thermal cracking of Fischer–Tropsch waxes. The method is realized in the circulating mode and is based on the indirect action of radiation on the wax dissolved in methane or other gaseous hydrocarbons. The duration of exposure to irradiation of the feedstock components depends on their volatility. The method is characterized by the increased fixation yield of the gas. The major fraction of the final product is gasoline rich in isoalkanes.
97-101
Magnetic phase diagrams of the Tm2Fe17–H system
Abstract
The compound Tm2Fe17, the only one among R2Fe17 (where R is a rare earth metal), exhibits uniaxial magnetic anisotropy at cryogenic temperatures. Its Curie temperature is close to room temperature, TC = 295 K. Magnetic phase diagrams for the Tm2Fe17–H system have been constructed on the basis of measuring the temperature and field dependences of magnetization performed for different crystallographic directions of single-crystalline samples of Tm2Fe17 and its hydrides Tm2Fe17Hx (x = 1, 2, 3, 4). It has been found that the hydrogen atoms, located in the interstices of the crystal lattice of this compound, have a significant effect on both its Curie temperature and the type of magnetic anisotropy.
102-105
Synthesis and photophysical properties of semiconductor molecules of D1–A–D2–A–D1 structure on the basis of quinoxaline and dithienosilole derivatives for organic solar cells
Abstract
new DTS(FCT2)2 organic semiconductor of the D1–A–D2–A–D1 structure containing dithienosilole and quinoxaline chromophores as electron-donating and electron-accepting moieties, respectively, has been synthesized. The study of optical and electrochemical properties shows that the material absorbs light in a wide range of the solar spectrum through 700 nm and has an appropriate arrangement of energy levels for the efficient dissociation of excitons. The obtained results demonstrate that this approach to the design of semiconductor molecules of the D1–A–D2–A–D1 structure is promising for high-performance organic solar cells.
106-110