| Autor: |
S. H. Gee, Hong, Y. K., Nam, I. T., Weatherspoon, C., Lyle, A., Sur, J. C. |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Magnetics; Oct2006, Vol. 42 Issue 10, p2843-2845, 3p, 3 Graphs |
| Abstrakt: |
A combination of energetic shake-milling and a subsequent double sintering process was employed to synthesize Co0.8Zn1.2Z (Ba3 Co0.8Zn1.2Fe24O41) hexaferrite nanoparticles with a high-saturation magnetization and a low coercivity. A homogeneous mixture of BaCO3, CoO, ZnO, 40-nm sized α-Fe2O3, and heat-treating in an oxygen environment were important factors for synthesizing single-phase Co2 Z-type ferrite nanoparticles. In addition to an X-ray diffraction pattern, Mössbauer spectra confirmed that only Fe3+ cations are present in the synthesized Co0.8 Zn1.2Z particles, implying single phase of the particles. Low-temperature sintering processing, 900 °C, was then successfully applied to the single-phase Co0.8Zn1.2 Z particles. The coercivities of the Co0.8Zn1.2Z powder and the low-temperature sintered disk were 9 and 20 Oe, respectively, while maintaining the saturation magnetization of 50 emu/g. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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