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首页> 外文期刊>Physica, B. Condensed Matter >Characterization and structural analysis of nano-sized Ba-Zn ferrite powders prepared by using a self-propagating high-temperature synthesis reaction and mechanical milling
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Characterization and structural analysis of nano-sized Ba-Zn ferrite powders prepared by using a self-propagating high-temperature synthesis reaction and mechanical milling

机译：自蔓延高温合成反应和机械研磨制备的纳米Ba-Zn铁氧体粉末的表征与结构分析

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摘要

Nano-sized BaxZn1-xFe2O4 ferrites were prepared by using a self-propagating high-temperature synthesis (SHS) reaction, followed by mechanical milling. The combustion temperature and the propagating rate during the SHS reaction were in the ranges of 860-1208 K and 4.9-6.0 mm/s, respectively. The final products were crystalline Ba0.23Zn0.77Fe2O4 and Ba0.48Zn0.52Fe2O4 phases with an average particle size of less than about 100 nm. As the initial composition ratio of BaO/ZnO and the oxygen partial pressure during the SHS reaction changed from 0.5 to 2.0 and 0.025 to 0.1, the maximum magnetization (Ms), residual magnetization (Mr) and coercive force (iHc) changed by about 233%, 372% and 82%, respectively. The complex permeability decreases with an increase of the frequency, and its real value (mu(r)') has a peak value at about 0.3 GHz. Neutron diffraction revealed that the changes of the magnetic properties and permeability were related to the non-stoichiometries of the ferrite powders.
机译：纳米级BaxZn1-xFe2O4铁氧体的制备方法是使用自蔓延高温合成（SHS）反应，然后进行机械研磨。 SHS反应期间的燃烧温度和传播速率分别在860-1208K和4.9-6.0mm / s的范围内。最终产物是结晶的Ba0.23Zn0.77Fe2O4和Ba0.48Zn0.52Fe2O4相，其平均粒径小于约100 nm。随着SHS反应期间BaO / ZnO的初始组成比和氧分压从0.5变为2.0和0.025变为0.1，最大磁化强度（Ms），残余磁化强度（Mr）和矫顽力（iHc）大约变化233 ％，372％和82％。复磁导率随频率的增加而降低，其实数值（mu（r）'）在约0.3 GHz处具有峰值。中子衍射表明，磁性和磁导率的变化与铁素体粉末的非化学计量有关。

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