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91.
M. V. Gorev V. S. Bondarev S. I. Raevskaya I. N. Flerov M. A. Malitskaya I. P. Raevskii 《Bulletin of the Russian Academy of Sciences: Physics》2016,80(9):1046-1050
Temperature dependences of specific heat Cp(T) and coefficient of thermal expansion ;(T) for Na0.95Li0.05NbO3 sodium-lithium niobate ceramic samples are investigated in the temperature range of 100–800 K. The Cp(T) and α(T) anomalies at T3 = 310 ± 3 K, T2 = 630 ± 8 K, and T1 = 710 ± 10 K are observed, which correspond to the sequence of phase transitions N ? Q ? S(R) ? T2(S). The effect of heat treatment of the samples on the sequence of structural distortions was established. It is demonstrated that annealing of the samples at 603 K leads to splitting of the anomaly corresponding to the phase transition Q → R/S in two anomalies. After sample heating to 800 K, the only anomaly is observed in both the Cp(T) and ;(T) dependence. Possible mechanisms of the observed phenomena are discussed. 相似文献
92.
M. A. Gladchenko S. D. Razumovskii D. A. Kovalev V. P. Murygina E. G. Raevskaya S. D. Varfolomeev 《Russian Journal of Physical Chemistry B, Focus on Physics》2016,10(3):496-503
The effect of mechanical pretreatment of surplus activated sludge from the wastewater treatment facilities of a plant producing chips (LLC “Frito Lay Manufacturing,” Kashira, Moscow oblast) in a cavitation disintegrator on methane generation in the process of anaerobic conversion is investigated. In laboratory conditions, cavitation disintegration pretreatment of the activated sludge results in a two- to sixfold increase in the transfer of various types of organic materials from the cell suspension into the aqueous phase. It is demonstrated that cavitation pretreatment of the activated sludge makes it possible to produce 31% extra methane as compared to the amount produced from the original sludge. 相似文献
93.
A. E. Raevskaya A. L. Stroyuk G. Ya. Grodzyuk S. Ya. Kuchmii V. M. Dzhagan V. F. Plyusnin V. P. Grivin 《Theoretical and Experimental Chemistry》2010,46(5):273-278
The dynamics of the radiative recombination of charge carriers in CdS nanoparticles stabilized in aqueous solutions of polyethyleneimine
was studied. It was shown that decay of the photoluminescence of the nanoparticles is characterized by a set of time constants
in the range of 10−1-102ns, while its rate depends on the energy of the radiation quanta. This relationship is interpreted as the result of competition
between the processes of radiative recombination and vibrational dissipation of the excitation energy. 相似文献
94.
G. Ya. Grodzyuk A. E. Raevskaya A. L. Stroyuk S. Ya. Kuchmii M. Ya. Vortman V. N. Lemeshko V. V. Shevchenko S. V. Chertopalov Yu. V. Kolomzarov V. M. Sorokin 《Theoretical and Experimental Chemistry》2012,47(6):361-366
Colloidal CdS nanoparticles measuring 1.9-2.3 nm and stabilized by guanidine-containing dendrimers were produced. It was established that such nanoparticles are characterized by photoluminescence in a wide spectral range (2.1-3.2 eV) with an average radiative lifetime of 55-85 ns depending on the energy of the emitted quanta and also by electroluminescence in the visible region of the spectrum (1.8-2.8 eV). 相似文献