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首页> 外文会议>International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications >Magnetic and Microwave Absorbing Properties of Co and Ti-Doped Sr M-Type Hexaferrites in the X-Band Frequencies
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Magnetic and Microwave Absorbing Properties of Co and Ti-Doped Sr M-Type Hexaferrites in the X-Band Frequencies

机译：X波段频率中掺Co和Ti掺杂的Sr M型六方铁氧体的磁和微波吸收特性

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摘要

Hexagonal ferrites or hexaferrites are prominent class of materials in the applications of microwave and magnetic applications. Have been utilized widely for microwave passive components such as circulators, the versatility to dope with other chemical elements and its high permeability enable hexaferrites as a strong candidate in electromagnetic interference shielding application. In this study, an attempt to alter the magnetic properties and microwave responses of Sr M-type hexaferrites was conducted by substituting Fe atoms with Co and Ti atoms through mechanical alloying method. This work found that the introduction of the doping elements Co-Ti dramatically decreases the coercivity at Co Ti content x from 0 to 1, whereas, has little effect on the saturation mass magnetization. Two distinct dips of the reflection loss in the range of 7 to 13 GHz were observed for all samples. For the first dip, the effective absorption bandwidth does not differ significantly. At the second dip, a relatively broader effective absorption bandwidth is predicted extending the upper limit of the measurement at 13 GHz for samples x at 0.3, 0.5, and 1. In addition, a notable reflection loss of -31 dB was observed for sample x equal to 0.3.
机译：六方铁氧体或六方铁氧体是微波和磁性应用中的主要材料类别。六价铁氧体已广泛用于循环器等微波无源元件中，具有掺杂其他化学元素的多功能性和高渗透性，使六价铁氧体成为电磁干扰屏蔽应用中的强大候选者。在这项研究中，试图通过机械合金化方法将Fe原子替换为Co和Ti原子，从而改变Sr M型六方铁氧体的磁性能和微波响应。这项工作发现，掺杂元素Co-Ti的引入在Co Ti含量x处将矫顽力从0显着降低到1，而对饱和质量磁化几乎没有影响。对于所有样品，反射损耗在7至13 GHz范围内出现两个明显的下降。对于第一次下降，有效吸收带宽没有显着差异。在第二次下降时，预计将有一个相对更宽的有效吸收带宽，从而扩展了样品x在0.3、0.5和1处13 GHz的测量上限。此外，样品x的反射损耗显着-31 dB等于0.3。

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