Microwave absorbent properties of nanosized cobalt ferrite powders prepared by coprecipitation and subjected to different thermal treatments

作者：Fannin P C; Marin C N^*; Malaescu I; Stefu N; Vlazan P; Novaconi S; Sfirloaga P; Popescu S; Couper C

来源：Materials & Design, 2011, 32(3): 1600-1604.

DOI：10.1016/j.matdes.2010.08.053

Cobalt ferrite nanopowders were produced by means of two methods using a common precipitating agent. After precipitation, in the first method the cobalt ferrite was calcined, whilst in the second method the precipitation was followed by a hydrothermal treatment. Characterization of the obtained powders was achieved by X-ray diffraction and scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDAX). Frequency dependence of the complex dielectric permittivity and complex magnetic permeability, over the frequency range 0.1-6 GHz, was also studied. By means of the above mentioned investigations, the structure, morphology and microwave absorbent properties of the powders obtained by both methods were compared.

• 出版日期2011-3