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Maleev N. A. Vasil’ev A. P. Kuzmenkov A. G. Bobrov M. A. Kulagina M. M. Troshkov S. I. Maleev S. N. Belyakov V. A. Petryakova E. V. Kudryashova Yu. P. Fefelova E. L. Makartsev I. V. Blokhin S. A. Ahmedov F. A. Egorov A. V. Fefelov A. G. Ustinov V. M. 《Technical Physics Letters》2019,45(11):1092-1096
Technical Physics Letters - A high-electron-mobility transistor (HEMT) based on InAlAs/InGaAs/InP heterostructures possessing higher breakdown characteristics is developed. An InGaAs composite... 相似文献
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N. A. Maleev V. A. Belyakov A. P. Vasil’ev M. A. Bobrov S. A. Blokhin M. M. Kulagina A. G. Kuzmenkov V. N. Nevedomskii Yu. A. Guseva S. N. Maleev I. V. Ladenkov E. L. Fefelova A. G. Fefelov V. M. Ustinov 《Semiconductors》2017,51(11):1431-1434
The molecular-beam epitaxy of InGaAs/InAlAs/AlAs structures for heterobarrier varactors is studied and optimized. The choice of the substrate-holder temperature, growth rate and III/V ratio in the synthesis of individual heterostructure regions, the thickness of AlAs inserts and barrier-layer quality are critical parameters to achieve the optimal characteristics of heterobarrier varactors. The proposed triple-barrier structures of heterobarrier varactors with thin InGaAs strained layers immediately adjacent to an InAlAs/AlAs/InAlAs heterobarrier, mismatched with respect to the InP lattice constant at an AlAs insert thickness of 2.5 nm, provides a leakage current density at the level of the best values for heterobarrier varactor structures with 12 barriers and an insert thickness of 3 nm. 相似文献
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Evgeniya V. Frantsina Emiliya D. Ivanchina Elena N. Ivashkina Nataliya S. Belinskaya Kseniya O. Fefelova 《Petroleum Science and Technology》2013,31(20):1672-1682
AbstractThis paper presents the results of comparative analysis of three run cycles of platinum catalyst for higher paraffins C9–C14 dehydrogenation process, performed using mathematical model. The results of model calculations were compared with the experimental data obtained at the industrial unit. It was established that deactivation of the platinum dehydrogenation catalyst is influenced by the technological modes of its operation, such as temperature, pressure, hydrogen/feedstock molar ratio and water supply. In the process of higher paraffins dehydrogenation, the phenomenon of platinum catalyst self-regeneration is observed. This occurs due to the action of feedstock components, in particular water and hydrogen involved in oxidation and hydrogenation of intermediate condensation products (coke structures). Model calculations showed that with a decrease in the hydrogen/feedstock molar ratio and simultaneous increase in water supply, depending on the temperature and composition of feedstock, it is possible to slow down deactivation process and increase the catalyst service life. This fact was experimentally confirmed at industrial unit. 相似文献
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