[en] Highlights: • Successful synthesis of LaAlO₃ using starch. • LaAlO₃ nucleation was identified within a mixed lanthanum-aluminum precursor at 700 °C. • Residual OH groups and anions stabilize the nanocomposite structure of perovskite. • Perovskite with a La rich surface with distortions partly persistent upto 1300 °C.

[en] New 3,7-diphenylthieno[3,2-e]bis[1,2,4]triazolo[4,3-a:4',3'-c]pyrimidine derivatives were easily synthesized at room temperature in good yield by the oxidative cyclization of thienopyrimidinyl hydrazones with alumina-supported calcium hypochlorite (Ca(OCl)_2/Al_2O_3)

[en] Published in summary form only

[en] In the present work authors present the work results on solid wastesutilization of Aluminium plant of Tajikistan with the purpose of obtaining ofcryolite-alumina mixture by the flotation method

[en] Complete text of publication follows. Guiding properties of insulating nanocapillaries have recently attracted a considerable attention. From the discovery that slow highly charged ions are efficiently transmitted and directed by insulating nanocapillaries without altering the initial charge state, different groups investigated this remarkable phenomenon for different capillary materials including our group. Guiding effect has been found for all the investigated insulating materials. The technique in the majority of these experiments was single ion detection by electrostatic spectrometers, with which data are collected only from a small solid angle at an instant. Experiments with position sensitive detectors are scarce. Recently, we installed a micro channel plate (MCP) detector in order to study twodimensional angular distributions in capillaryguiding experiments.The experiments were carried out at the Institute of Nuclear Research (ATOMKI), Debrecen. Ions were provided by a 14.5 GHz electron cyclotron resonance (ECR) ion source. In the early stage of the experiments it was noticed that significant amount of ultra-violet photons, for which the detector is sensitive, are in the ion beam. The ions could be separated from the photons with an electrostatic deflection system as in Fig. 1 it can be seen. We studied the transmission of Ne⁶⁺ ions through Al₂O₃ capillaries by the MCP detector, in order to extend our one-dimensional data, which were collected earlier. The capillaries were prepared at Universite Catholique de Louvain using the self-ordering phenomena during a two-step anodization process. The target samples were nearly circularly shaped membranes of nanochanneled Al₂O₃ with a diameter of about 8 mm. The thickness of the samples was about 15 μm and the capillaries were ordered in a honeycomb structure. The average inner capillary diameters of the two samples used in the present experiments were about 140 and 260 nm. In Fig. 2a, a MCP image is shown. Here the sample foil filled only half of a circular opening on the sample holder (see the right side of Fig. 1). The UV photons passed the sample holder above the sample foil, and hit the MCP detector directly. The 3 keV Ne⁶⁺ ion beam, which was shifted by 4 mm downwards by the deflector system, hit the untitled target sample of 140 nm diameter capillaries. The lowest broad spot is due to ions transmitted trough the sample. It has a width of about 4 deg at half maximum. Similar angular distributions were measured earlier with the electrostatic spectrometer. The upper, sharp and intense spot is due to the photons, which directly hit the detector. In Fig. 2b the same scattering pattern is shown, but with a horizontal electric field applied in front of the detector in order to separate different charge states. As a result, the spots due to ions are deflected toward right. The magnitude of the deflection depends on their charge state. The small, bright spot due to the photons remains in the same position. The most important fact is that only one charge state is visible for the ions transmitted through the foil. In Fig. 3a, MCP images are shown for 6 keV Ne6+ ions transmitted through the 260 nm capillary samples at 5± tilt angles. The photon beam was blocked in this case. There is a clear indication of the capillary guiding since the maxima of the transmission nearly coincide with the tilt angle. The nice circular shape of the spot indicates that the angular distribution is azimuthally symmetric. In Fig. 3b, the same image with charge state separation is presented (positive ions are deflected to the right direction). As it shows, significant amount of non-deflected particles are present beside the Ne6+ ions. Again, this emission is most likely due to photons, because there is no emission of ions with lower charge states are observed. It is well known that when a multiply charged ion gets close to a solid surface, electron capture processes occur. The captured electrons populate highly excited Rydberg states on the projectile, and subsequently decay to lower lying states by Auger process or radiative de-excitation leading to UV or Xray emission [5]. The identification of the nondeflected particles as photons is affirmed by the fact that such emission is observable only for tilted samples, i.e. when a significant fraction of the incoming ions are impinging on the capillary walls. In conclusion, two-dimensional angular distributions of ions guided through Al₂O₃ nanocapillaries have been measured by a MCP detector. The results compare well to earlier onedimensional data of electrostatic spectrometers showing similar angular broadening and guiding effect up to few degree. Significant amount of UV photons originating from the capillaries were observed for the first time. This phenomenon as result of ion - surface interactions may trigger further studies

[en] Optimum conditions of decomposition of the Siallites of Ziddi deposits by Hydrochloric Acid have been found. The way concerns to technology of processing of sialites and kaolin which can be recommended for obtaining of several useful products for a national economy such as: coagulant, alumina, and porcelain raw material

[en] In this article of book authors present the description of the technologyof alumina obtaining from the nitrate aluminium salts

[en] In this paper, relationship between degree of extraction of alumina from a number of factors, such as leaching temperature, process duration, and others has been studied. Using the least squares method, a number of equations of connection between the required rate (α) and considered factors have been derived. (author)

No abstract available

[en] In this chapter of book considered the possibility of reprocessing ofaluminium chloride in to the alumina with applying of calcium carbonateexcepting thermo-decomposition process