Microwave-absorbing properties of strontium ferrites prepared via sol-gel method
Microwave-absorbing properties of strontium ferrites prepared via sol-gel method
复制标题
溶胶-凝胶法制备锶铁氧体的吸波性能
DOI：
10.1002/crat.201700057
复制
发表时间：
2017
影响因子：
1.5
通讯作者：
Cheng Li-chun
中科院分区：
文献类型：
--
作者：
Liu Xing;Pan Shun-kang;Zhong Xing;Cheng Li-chun
采用溶胶-凝胶法制备了锶铁氧体，利用X射线衍射（XRD）、扫描电子显微镜（SEM）和矢量网络分析仪（VNA）对样品的相结构、形貌和吸波性能进行了研究。结果表明，随着烧结温度的升高，吸波峰值频率向低频方向移动，反射损耗值先减小后增大。在相同的烧结温度（1200 °C）和不同的保温时间（2 h、4 h、6 h、8h）下，铁氧体具有相同的Z-型相结构。随着保温时间的增加，铁氧体的吸收峰频率向低频区移动，最小反射率值先减小后增大，在1200 °C保温4 h的铁氧体具有最佳的微波吸收性能。
Strontium ferrites were prepared by sol‐gel method, the phase structure, morphology, and microwave absorbing properties of the samples were studied by X‐ray diffraction (XRD), scanning electron microscopy (SEM) and vector network analyzer (VNA). The results show that with increasing sintering temperature, the wave‐absorption peak frequency moves towards low‐frequency direction and the reflection loss value decreases first, and then increases. At the same sintering temperature (1200 °C) and different holding time (2h, 4h, 6h, 8h), the ferrites have the same Z‐type phase structure. With increasing holding time, the absorption peak frequency of the ferrites shift towards low‐frequency region, and the minimum reflectivity value decreases first and increases afterwards, and the ferrite holding at 1200 °C for 4 h has the best microwave‐absorbing property.