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Ba _3 Co _0.8 Zn _1.2 Fe _24 O _41 (Co _2 Z-Type) Hexaferrite Particles for LTCC Substrates

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6 Author(s)
Gee, S.H. ; Dept. of Mater. Sci. & Eng., Idaho Univ., Moscow, ID ; Hong, Y.K. ; Nam, I.T. ; Weatherspoon, C.
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A combination of energetic shake-milling and a subsequent double sintering process was employed to synthesize Co0.8Zn1.2 Z (Ba3Co0.8Zn1.2Fe24O 41) hexaferrite nanoparticles with a high-saturation magnetization and a low coercivity. A homogeneous mixture of BaCO3 , CoO, ZnO, 40-nm sized alpha-Fe2O3, and heat-treating in an oxygen environment were important factors for synthesizing single-phase Co2Z-type ferrite nanoparticles. In addition to an X-ray diffraction pattern, Mossbauer spectra confirmed that only Fe3+ cations are present in the synthesized Co0.8Zn1.2Z particles, implying single phase of the particles. Low-temperature sintering processing, 900degC, was then successfully applied to the single-phase Co0.8Zn1.2Z particles. The coercivities of the Co 0.8Zn1.2Z powder and the low-temperature sintered disk were 9 and 20 Oe, respectively, while maintaining the saturation magnetization of 50 emu/g

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Magnetics, IEEE Transactions on  (Volume:42 ,  Issue: 10 )