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108 Ω cm which is higher by atleast two orders of magnitude than that reported (
106 Ω cm) for ferrites prepared by the conventional ceramic method. This is attributed to better purity as well as better compositional and microstructural control achievable by the citrate method. High resistivity makes these ferrites suitable particularly for high-frequency applications where eddy current losses are required to be low.
doi:10.1016/S0304-8853(01)00376-6 
Copyright © 2001 Elsevier Science B.V. All rights reserved.
Synthesis of Cu-modified Co2Z hexaferrite with planar structure by a citrate precursor method
Received 12 December 2000;
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Abstract
Co2Z hexaferrite is a planar anisotropic iron oxide which can present high values of permeability at high frequency. In this paper, Cu-modified Co2Z hexaferrites powders were synthesized at a low temperature using a citrate precursor method. The formation of Z-type phases was characterized by X-ray diffraction and magnetization measurements. It is found that phase formation temperature and sintering temperature were influenced directly by the content of copper. The effects of Cu-substitution on the microstructure and high frequency properties of the ceramics have been investigated.
Author Keywords: Cu-substitution; Z-type hexaferrite; High frequency property; Low-temperature sintering; Citrate precursor method
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