|
Author(s): |
Yang Li, College of Chemistry & Materials Science, Sichuan normal University, Chengdu, China, 610066
Xin Lai, College of Chemistry & Materials Science, Sichuan normal University, Chengdu, China, 610066
Dao-jiang Gao, College of Chemistry & Materials Science, Sichuan normal University, Chengdu, China, 610066
Jian Bi, College of Chemistry & Materials Science, Sichuan normal University, Chengdu, China, 610066
Dun-min Lin, College of Chemistry & Materials Science, Sichuan normal University, Chengdu, China, 610066 |
|
Abstract: |
Using CoSO4, ZnSO4 and Fe2(SO4)3 as raw materials, ammonia as precipitant, hydroxide precursors were prepared by chemical coprecipitation method, after being sintered at 750 ℃ for 3h, the CoxZn1-xFe2O4 nanocrystallines were obtained. By through XRD, SEM and VSM measurements, the morphology, grain size, crystal structure and magnetic properties of CoxZn1-xFe2O4 nanocrystallines were investigated. The results show that all the samples are pure spinel structure; the obtainted CoxZn1-xFe2O4 particles are spherical and the mean grain size is about 20-40nm. The specific saturation magnetization (σs) and coercive force (Hc) of the samples increase with the increasing content of cobalt in the CoxZn1-xFe2O4 nanocrystallines, and it gradually transforms from the paramagnetism of ZnFe2O4 to the ferrimagnetism of CoFe2O4.
|