The magnetisms of RCo5（R = rare earth） intermetallics are systematically studied with the empirical electron theory of solids and molecules（EET）.The theoretical moments and Curie temperatures agree well with exper...The magnetisms of RCo5（R = rare earth） intermetallics are systematically studied with the empirical electron theory of solids and molecules（EET）.The theoretical moments and Curie temperatures agree well with experimental ones.The calculated results show strong correlations between the valence electronic structure and the magnetic properties in RCo5 intermetallic compounds.The moments of RCo5 intermetallics originate mainly from the 3d electrons of Co atoms and 4f electrons of rare earth,and the s electrons also affect the magnetic moments by the hybridization of d and s electrons.It is found that moment of Co atom at 2c site is higher than that at 3g site due to the fact that the bonding effect between R and Co is associated with an electron transformation from 3d electrons into covalence electrons.In the heavy rare-earth-based RCo5 intermetallics,the contribution to magnetic moment originates from the 3d and 4f electrons.The covalence electrons and lattice electrons also affect the Curie temperature,which is proportional to the average moment along the various bonds.展开更多
This paper reports that the study results of the stabilization energy dependence of the temperature for RCo 5(R=Pr,Nd,Tb,Dy,Ho) and R 2Co 17(R=Er,Tm,Yb) compounds,which was studied again by us after J.E.Greedan & ...This paper reports that the study results of the stabilization energy dependence of the temperature for RCo 5(R=Pr,Nd,Tb,Dy,Ho) and R 2Co 17(R=Er,Tm,Yb) compounds,which was studied again by us after J.E.Greedan & V.U.S.Rao and For RCo 5(R=Pr,Nd,Tb,Dy,Ho)compounds was defferent from the results of J.E.Greedan and V.U.S.Rao.|E st(T)| monotonously decreases with increase in temperature.Moreover,at a higher temperature,as the temperature rises,|E st(T)| drops more drastically than the results obtained by J.E.Greedan and V.U.S.Rao.The shape of curves describing |E st(T)| for R 2Co 17-Th 2Ni 17(I) and (Ⅱ)(R=Er,Tm,Yb) is similar with that of RCo 5(R=Pr,Nd,Tb,Dy,Ho).Furthermore,|E st(T)| of R 2Co 17-Th 2Ni 17(R=Er,Tm,Yb) composed of that of R 2Co 17-Th 2Ni 17(I) and (Ⅱ)(R=Er,Tm,Yb) is still much defferent from the results obtained by J.E.Greedan and V.U.S.Rao.The paper also elaborately illustrate the numerical method in deriving these consequence.展开更多
With the increasingly serious environmental problems,China has adopted more and more strict industrial production emission policies.Haze pollutes the weather and limits the production of polluting enterprises have ser...With the increasingly serious environmental problems,China has adopted more and more strict industrial production emission policies.Haze pollutes the weather and limits the production of polluting enterprises have seriously affected the normal production process of the factory.The pollutants discharged in automobile manufacturing process are increasing,and the environmental pollution caused by automobile coating needs to be solved urgently.Because a large amount of solvent-based paint is used in the production process,the pollution caused by volatile organic compounds is difficult to avoid.RCO is a new technology in the field of automobile coating waste gas treatment.Application of RCO in automobile coating waste gas treatment is studied.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.11274110)
文摘The magnetisms of RCo5（R = rare earth） intermetallics are systematically studied with the empirical electron theory of solids and molecules（EET）.The theoretical moments and Curie temperatures agree well with experimental ones.The calculated results show strong correlations between the valence electronic structure and the magnetic properties in RCo5 intermetallic compounds.The moments of RCo5 intermetallics originate mainly from the 3d electrons of Co atoms and 4f electrons of rare earth,and the s electrons also affect the magnetic moments by the hybridization of d and s electrons.It is found that moment of Co atom at 2c site is higher than that at 3g site due to the fact that the bonding effect between R and Co is associated with an electron transformation from 3d electrons into covalence electrons.In the heavy rare-earth-based RCo5 intermetallics,the contribution to magnetic moment originates from the 3d and 4f electrons.The covalence electrons and lattice electrons also affect the Curie temperature,which is proportional to the average moment along the various bonds.
文摘This paper reports that the study results of the stabilization energy dependence of the temperature for RCo 5(R=Pr,Nd,Tb,Dy,Ho) and R 2Co 17(R=Er,Tm,Yb) compounds,which was studied again by us after J.E.Greedan & V.U.S.Rao and For RCo 5(R=Pr,Nd,Tb,Dy,Ho)compounds was defferent from the results of J.E.Greedan and V.U.S.Rao.|E st(T)| monotonously decreases with increase in temperature.Moreover,at a higher temperature,as the temperature rises,|E st(T)| drops more drastically than the results obtained by J.E.Greedan and V.U.S.Rao.The shape of curves describing |E st(T)| for R 2Co 17-Th 2Ni 17(I) and (Ⅱ)(R=Er,Tm,Yb) is similar with that of RCo 5(R=Pr,Nd,Tb,Dy,Ho).Furthermore,|E st(T)| of R 2Co 17-Th 2Ni 17(R=Er,Tm,Yb) composed of that of R 2Co 17-Th 2Ni 17(I) and (Ⅱ)(R=Er,Tm,Yb) is still much defferent from the results obtained by J.E.Greedan and V.U.S.Rao.The paper also elaborately illustrate the numerical method in deriving these consequence.
文摘With the increasingly serious environmental problems,China has adopted more and more strict industrial production emission policies.Haze pollutes the weather and limits the production of polluting enterprises have seriously affected the normal production process of the factory.The pollutants discharged in automobile manufacturing process are increasing,and the environmental pollution caused by automobile coating needs to be solved urgently.Because a large amount of solvent-based paint is used in the production process,the pollution caused by volatile organic compounds is difficult to avoid.RCO is a new technology in the field of automobile coating waste gas treatment.Application of RCO in automobile coating waste gas treatment is studied.
