摘要
Manganese ferrite particles with spinel structure were synthesized by a modified co-precipitation method,and then the thermal stability on their structural and magnetic properties was investigated by thermal annealing at different gas ambients.Experimental results showed that decomposition of metal oxides occurred when Mn ferrite particles with spinel structure were annealed under air ambient,while samples annealed in vacuum or argon remained in the spinel structural form.The highest saturation magnetization value of 58 emu/g was obtained when the sample was annealed at 400℃ in argon.The result showed that the thermal stability of MnFe2O4 was better under Ar ambient conditions or in vacuum.
Manganese ferrite particles with spinel structure were synthesized by a modified co-precipitation method, and then the thermal stability on their structural and magnetic properties was investigated by thermal annealing at different gas ambients. Experi- mental results showed that decomposition of metal oxides occurred when Mn ferrite particles with spinel structure were an- nealed under air ambient, while samples annealed in vacuum or argon remained in the spinel structural form. The highest satu- ration magnetization value of 58 emu/g was obtained when the sample was annealed at 400℃ in argon. The result showed that the thermal stability of MnFe2O4 was better under Ar ambient conditions or in vacuum.
基金
supported by the National Basic Research Program of China (Grant No. 2012CB933101)
the National Science Fund for Distinguished Young Scholars (Grant No. 50925103)
the Key Grant Project of Chinese Ministry of Education (Grant No. 309027)
the National Natural Science Foundation of China (Grant Nos. 11034004 and 50902064)
the Fundamental Research Funds for Central Universities (Grant No.lzujbky-2010-74)
