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| Formation of nanocrystalline spinel Ni--Zn ferrite by mechanical alloying |
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| 上海大学 |
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Cite this article:
. Formation of nanocrystalline spinel Ni--Zn ferrite by mechanical alloying. Chin J Mater Res, 2004, 18(3): 315-320.
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Abstract A mixture of NiO, ZnO and $\alpha$--Fe$_{2}$O$_{3}$ powders was milled to
synthesize the Ni--Zn ferrite by mechanochemical reaction. The formation process
of the nanocrystalline was investigated by XRD, DSC and TG. After annealed at
600℃ in the air, the standard spinel structure was formed. The result showed
that the values of as--milled nanocrystalline size changed from 15 nm to 32 nm.
The best saturated magnetization intensity was measured, $\sigma_{\rm s}$ =
63.4 emu$\cdot$g$^{-1}$, indicating superior properties of soft magnetic materials.
The atomic magnetic moments of the samples annealed at 800℃ under vacuum were
calculated with a result from 3.4 to 3.7 $\mu_{\rm B}$.
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Received: 19 July 2004
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