The 11.3 nm diameter nanopowders of Ni dominated Ni（Fe） solid solution can be prepared by（using） aluminum powder to react with FeSO4\5（NH4）2SO4 and NiSO4\5（NH4）SO4 mixed solution.In the product,the Fe atoms re...The 11.3 nm diameter nanopowders of Ni dominated Ni（Fe） solid solution can be prepared by（using） aluminum powder to react with FeSO4\5（NH4）2SO4 and NiSO4\5（NH4）SO4 mixed solution.In the product,the Fe atoms replaced parts of the Ni atoms.While the mass fraction of Ni2+/（Fe2++Ni2+） in the solution is higher than 76%,solid solution of homogenous phase Ni（Fe） can be obtained.If the content of Ni2+/（Fe2++Ni2+） lower than this point,the Ni（Fe）+Fe or Fe+Ni0.36Fe0.64 mixed phase nanopowders will be produced.展开更多
Fe_(0.64)Ni_(0.36)-NiFe_2O_4 nanocomposite was performed with partially reducing NiFe_2O_4 nanoparticles in Ar/H_2 ambient.The microwave and static magnetic properties were investigated.The results showed that the nan...Fe_(0.64)Ni_(0.36)-NiFe_2O_4 nanocomposite was performed with partially reducing NiFe_2O_4 nanoparticles in Ar/H_2 ambient.The microwave and static magnetic properties were investigated.The results showed that the nanocomposite was characterized with enhanced microwave absorption properties.The optimal reflection loss(RL)of the nanocomposite reached-24.8 dB at 14 GHz for an absorber thickness of 1.5 mm.Meanwhile,a broad bandwidth for RL<-10 dB was obtained in the range of 3.1—15.1 GHz for an absorber thickness from1.0 to 4.0 mm.The enhancement is attributed to the increase of dielectric and magnetic loss after reducing procedure.展开更多
文摘The 11.3 nm diameter nanopowders of Ni dominated Ni（Fe） solid solution can be prepared by（using） aluminum powder to react with FeSO4\5（NH4）2SO4 and NiSO4\5（NH4）SO4 mixed solution.In the product,the Fe atoms replaced parts of the Ni atoms.While the mass fraction of Ni2+/（Fe2++Ni2+） in the solution is higher than 76%,solid solution of homogenous phase Ni（Fe） can be obtained.If the content of Ni2+/（Fe2++Ni2+） lower than this point,the Ni（Fe）+Fe or Fe+Ni0.36Fe0.64 mixed phase nanopowders will be produced.
基金supported by National Science Fund for Distinguished Young Scholars (Grant No.50925103)the National Nature Science Foundation of China (Grant No.11034004)
文摘Fe_(0.64)Ni_(0.36)-NiFe_2O_4 nanocomposite was performed with partially reducing NiFe_2O_4 nanoparticles in Ar/H_2 ambient.The microwave and static magnetic properties were investigated.The results showed that the nanocomposite was characterized with enhanced microwave absorption properties.The optimal reflection loss(RL)of the nanocomposite reached-24.8 dB at 14 GHz for an absorber thickness of 1.5 mm.Meanwhile,a broad bandwidth for RL<-10 dB was obtained in the range of 3.1—15.1 GHz for an absorber thickness from1.0 to 4.0 mm.The enhancement is attributed to the increase of dielectric and magnetic loss after reducing procedure.
基金Project（60534020） supported by the National Natural Science Foundation of China Project（03G51019） supported by the Aeronautics Foundation of China+1 种基金 Project（04-0165） supported by the New Century Programme for Excellent Talents of the Ministry of Education of China Project（400152） supported by the Innovation Research Foundation for PhD student of BUAA
