摘要 :
γ'-Fe_4N thin film is considered as a potential precursor to synthesize a"-Fe16N2, which is a promising high saturation magnetization permanent magnetic material that could be attained from the decomposition of the high nitrogen ...
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γ'-Fe_4N thin film is considered as a potential precursor to synthesize a"-Fe16N2, which is a promising high saturation magnetization permanent magnetic material that could be attained from the decomposition of the high nitrogen content iron nitride at appropriate temperature. High temperature thermal annealing process of γ'-Fe_4N material is studied using Molecular Dynamics (MD) modeling method. With Modified-Embedded-Atom-Method (MEAM) interatomic potential of Fe-N and bond forming/breaking MD simulation, the number of Nitrogen bonds formed is found to be insignificant. Results suggest the formation of N_2 bonds requires high temperature and existing of lattice imperfections, i.e. where neighboring N atoms could be placed close to N-N bond length distance.
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摘要 :
The MDEA-PZ binary system and the MDEA-PZ-MEA/DEA/ETA/TETA ternary system were used to absorb CO_2 from the simulated flue gas. The experimental results showed that the best performance of the absorption of CO_2 was achieved under...
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The MDEA-PZ binary system and the MDEA-PZ-MEA/DEA/ETA/TETA ternary system were used to absorb CO_2 from the simulated flue gas. The experimental results showed that the best performance of the absorption of CO_2 was achieved under the mass ratio of MDEA to PZ of 10/4 in the MDEA-PZ binary system. In the MDEA-PZ-MEA/DEA/ETA/TETA ternary system, due to the different molecular structure of the additives, the absorption performance of CO_2 was determined as follows: MDEA-PZ-TETA>MDEA-PZ-ETA>MDEA-PZ-MEA>MDEA-PZ-DEA. In the MDEA-PZ- TETA ternary system, the better absorption performance could be reached at the volume ratio of MDEA-PZ to TETA of 1:2. Moreover, it was indicated that there was a weakly negative interaction among MDEA, PZ and TETA.
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