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排序方式: 共有194条查询结果,搜索用时 78 毫秒
91.
The drift mobility of charge carriers in glassy semiconductors of the Se-As system doped with Ag, Au, and Tl is investigated.
A considerable increase in the electron drift mobility is established in samples doped with Ag. These results are explained
within a model of charged defects.
Fiz. Tekh. Poluprovodn. 32, 803–805 (July 1998) 相似文献
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V. V. Khil'chevskii L. I. Tuchinskii V. G. Sharapov V. G. Enevich A. B. Sapozhnikova T. V. Kazakova 《Strength of Materials》1990,22(7):1064-1067
The results of investigation of the damping capacity (DC) of porous titanium subjected to dynamic tangential stresses with the application of a static tensile stress are presented. It is shown that the DC of porous titanium depends on the size of the titanium-powder fraction and the residual porosity. It is established that static tensile stresses lead to a decrease in the logarithmic decrement in the majority of cases.Translated from Problemy Prochnosti, No. 7, pp. 98–101, July, 1990. 相似文献
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Dulce M. Morales Mariya A. Kazakova Stefan Dieckhfer Alexander G. Selyutin Georgiy V. Golubtsov Wolfgang Schuhmann Justus Masa 《Advanced functional materials》2020,30(6)
Discovering precious metal‐free electrocatalysts exhibiting high activity and stability toward both the oxygen reduction (ORR) and the oxygen evolution (OER) reactions remains one of the main challenges for the development of reversible oxygen electrodes in rechargeable metal–air batteries and reversible electrolyzer/fuel cell systems. Herein, a highly active OER catalyst, Fe0.3Ni0.7OX supported on oxygen‐functionalized multi‐walled carbon nanotubes, is substantially activated into a bifunctional ORR/OER catalyst by means of additional incorporation of MnOX. The carbon nanotube‐supported trimetallic (Mn‐Ni‐Fe) oxide catalyst achieves remarkably low ORR and OER overpotentials with a low reversible ORR/OER overvoltage of only 0.73 V, as well as selective reduction of O2 predominantly to OH?. It is shown by means of rotating disk electrode and rotating ring disk electrode voltammetry that the combination of earth‐abundant transition metal oxides leads to strong synergistic interactions modulating catalytic activity. The applicability of the prepared catalyst for reversible ORR/OER electrocatalysis is evaluated by means of a four‐electrode configuration cell assembly comprising an integrated two‐layer bifunctional ORR/OER electrode system with the individual layers dedicated for the ORR and the OER to prevent deactivation of the ORR activity as commonly observed in single‐layer bifunctional ORR/OER electrodes after OER polarization. 相似文献
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L. I. Buravov V. N. Zverev A. V. Kazakova N. D. Kushch A. I. Manakov 《Instruments and Experimental Techniques》2008,51(1):156-157
Two methods for measuring solidification point T S of the GKGh-136 silicone liquid are described. T S ≌ 125 K is determined by the first method from specific features of the temperature dependence of the resistance of an organic quasi-2D conductor in a GKGh-136 droplet with a size of ~1 mm. T S ≌ 130 K is assessed by the second method from the occurrence of a specific feature in the temperature dependence of the resistance of the GKGh-136 and fine-dispersed graphite mixture, which is caused by desorption of helium in the sample volume during warming-up >T S . 相似文献