of 3 x 10(-16) cm(2) for He and 17 x 10(-16) cm(2) for N has been measured for the ion-thin-film interaction phenomena, The structure crystalline silicon/thermally grown SiO2/PECVD film has also been investigated for the hydrogen radiation-enhanced diffusion in thermally grown SiO2. ...
7b). For instance, the diffusion coefficient of CO2 was evaluated to be around 10−5 cm2 s−1 in a molten alkali carbonate at 800 °C and 10−14-10−17 cm2/s in a solid carbonate in the 390–725 °C range [80,81]. This can have a positive impact on the reduction step...
The Knudsen diffusion model demonstrates the movement of Si atoms into the storage matrix (D = the diffusion coefficient for the mobility of hydrogen atoms on the Si surface) and is dominated by the molecular wall collision [369]. The Coefficient D is expressed by equation (17), where Ve ...
The solubility in the form of hydrogen molecules estimated by the permeability and diffusion coefficient values was two orders of magnitude smaller than that of hydrogen dissolved in the form of hydroxyl radicals. The migration rate of the hydrogen in the form of hydroxyl radicals is far smaller ...
(Fig.4c), indicating that the water molecule adsorption process and hydrogen adsorption process in the biphase system become much more comfortable than that in the triphase system. Kinetically, the hydrogen gas diffusion coefficientDGin the gaseous environment can be calculated by the Chapman–Enskog...
Biomass-based hydrogen production is an innovative approach for realizing carbon-neutral energy solutions. Despite their promise, both structures differ in terms of the biomass energy domain, which is at the entry point of the technology, and the hydroge
Carbon-rich sources, such as coal and carbon monoxide gas, have been extensively used in the metal industry as the reducing agent of metal oxides and as th
g SiO2 deposition and release hole etching. h TMAH etching and other factors also produce common-mode interfer- ence. Therefore, the reference thermopile for eliminating the common-mode interference is very important in the sensor. To improve the sensitivity of the thermopile, single- crystalline ...
In the chips with mechanical and thermal contact of them, the kinetic process of hydrogen saturation is similar to those in compact specimens but with reduced residual stresses (at room temperature). The coefficient of diffusion DH in a filler powder is 10 times less than in α-Ti thanks to...
By combining the experimental data and state-of-the-art models, we discuss the recent progress in understanding crossover mechanisms. The dominant mechanism for hydrogen crossover is the diffusion driven by both the high hydrogen partial pressures at the cathode and supersaturation in the catalyst ...