排序方式: 共有81条查询结果,搜索用时 15 毫秒
1.
V. B. Platonov M. N. Rumyantseva T. B. Shatalova A. E. Baranchikov A. M. Gas’kov 《Russian Journal of Applied Chemistry》2018,91(3):447-453
Nanofibers of semiconducting oxides SnO2, ZnO, WO3, produced by the electrospinning method, were tested as sensitive materials for detection of products formed in pyrolysis of polyvinyl chloride in conditions simulating the smoldering of electrically insulating materials upon occurrence of a short-circuit failure in electrical circuits. The method of thermal analysis with mass-spectroscopic determination of gaseous products demonstrated that, in pyrolysis of polyvinyl chloride in the temperature range 200–400°C corresponding to the invisible-smoke stage, the main component of the gas mixture being formed is HCl. It was shown that the materials synthesized can be used to develop gas sensors for early fire warning. 相似文献
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N. N. Gubanova G. P. Kopitsa K. V. Ezdakova A. Ye. Baranchikov B. Angelov A. Feoktystov V. Pipich V. Ryukhtin V. K. Ivanov 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2014,8(5):967-975
This study is devoted to investigation of the micro- and mesostructure (including fractal properties) of porous zirconia glasses synthesized by precipitation from zirconium n-propoxide solutions in the presence of different hydrolyzing-agent (H2O) quantities at different temperatures. Analysis of small-angle neutron, ultra-small-angle neutron and X-ray scattering, scanning electron microscopy allows concluding that the synthesized glasses are complex systems with a three-level hierarchical fractal structure. It is revealed that both the temperature of synthesis and the H2O concentration in the initial solution significantly affect the structural characteristics of the glasses. 相似文献
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E. A. Dolgopolova O. S. Ivanova A. B. Shcherbakov N. Ya. Spivak A. E. Baranchikov V. K. Ivanov 《Russian Journal of Inorganic Chemistry》2013,58(11):1287-1293
A method for the synthesis of stable aqueous sols of nanocrystalline solid solutions Ce1?x Gd x O2-δ (x = 0.10, 0.15, 0.20) and Y0.9Eu0.1VO4 and nanocomposites Ce1 ? x Gd x O2-δ/Y0.9Eu0.1VO4 stabilized by biocompatible low-molecular-weight polyacrylic acid was proposed. Polyacrylic acid was shown to be a promising matrix for the preparation of polyfunctional composite materials. 相似文献
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Han Bing-yuan Khoroshilov Andrey V. Tyurin Alexander V. Baranchikov Alexander E. Razumov Mikhail I. Ivanova Olga S. Gavrichev Konstantin S. Ivanov Vladimir K. 《Journal of Thermal Analysis and Calorimetry》2020,142(4):1533-1543
Journal of Thermal Analysis and Calorimetry - Thermodynamic properties (heat capacity Cp, entropy S°, enthalpy change ΔH° and reduced Gibbs energy ΔΦ°) of crystalline... 相似文献
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L. S. Skogareva S. Yu. Kottsov T. O. Shekunova A. E. Baranchikov O. S. Ivanova A. D. Yapryntsev V. K. Ivanov 《Russian Journal of Inorganic Chemistry》2017,62(9):1141-1146
It has been shown for the first time that the use of hydrogen peroxide allows precipitation of rare earth orthophosphates (La–Tb) from phosphoric acid solutions at temperatures below 100°C. Either anhydrous or hydrated orthophosphates with monazite or rhabdophane structure, respectively, can be obtained depending on rare earth element position in lanthanide series and precipitation conditions (orthophosphoric acid and hydrogen peroxide concentration). Hydrated orthophosphates with rhabdophane structure can be prepared by precipitation with hydrogen peroxide for all studied rare earth elements. 相似文献
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V. K. Ivanov V. D. Maksimov A. S. Shaporev A. E. Baranchikov B. P. Churagulov I. A. Zvereva Yu. D. Tret’yakov 《Russian Journal of Inorganic Chemistry》2010,55(2):150-154
We carried out a thorough study of the micromorphology, physicochemical properties, and photocatalytic activity of nanocrystalline
anatase powders formed during the hydrothermal treatment of titanyl sulfate solutions of various compositions. A new procedure
is proposed for the hydrothermal synthesis of nanocrystalline anatase having specific surface areas of ∼50 m2/g and photocatalytic activities exceeding the activity of the commercially available Degussa P25 formulation. 相似文献
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V. A. Ketsko E. N. Beresnev M. A. Kop’eva L. V. Elesina A. I. Baranchikov A. I. Stognii A. V. Trukhanov N. T. Kuznetsov 《Russian Journal of Inorganic Chemistry》2010,55(3):427-429
This work demonstrates the possibility of preparing solid solutions in the (MgGa2O4)
x
(MgFe2O4)1 − x
system by pyrohydrolytic and solid-phase methods. It is shown that the products obtained have different specific surface
areas depending on the ratio between metal nitrates and citric acid. The composition dependence of the unit cell parameter
deviates considerably from the Vegard’s rule. The compounds obtained are found to be stable up to 300°C, which makes them
candidate materials for electronics. 相似文献
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V. K. Ivanov A. E. Baranchikov Yu. D. Tret’yakov 《Russian Journal of Inorganic Chemistry》2010,55(5):665-669
The products of microwave-hydrothermal (MW-HT) treatment of amorphous hydrous zirconia and hafnia xerogels were studied by
powder X-ray diffraction and thermal analysis. Decreasing gel precipitation pH leads to an increase in ZrO2 and HfO2 crystallization rates and enhances the formation of stable monoclinic ZrO2. 相似文献