Modified Pechini synthesis of hexaferrite Co(2)Z with high permeability

作者：Qin Lang; Verweij Henk^*

来源：Materials Letters, 2012, 68: 143-145.

DOI：10.1016/j.matlet.2011.10.052

• Ceramics
• Hexaferrite
• Sintering
• Magnetic permeability

Magnetic ceramic hexagonal ferrites with strong magnetocrystalline anisotropy are considered for application in high frequency antennas. In particular, Ba3Co2Fe24O41 (CO(2)Z) is expected to exhibit a high permeability and low loss at frequencies > 1 GHz. In this paper, we report the fabrication of Co(2)Z material starting from precursor powders made by a modified-Pechini route. The precursor powders are compacted by dry pressing, followed by sintering to achieve a relative density of 90.3%. The morphology, crystal structure and high frequency magnetic permeability of thus formed materials are presented. The highest initial permeability, mu ' = 11.9, was achieved for the samples calcined/sintered at 1300/1330 degrees C. It is expected that further improvement can be achieved by optimization of the sintered micro-structures. Published by Elsevier B.V.

• 出版日期2012-2-1