Co-Zn掺杂的W型钡铁氧体空心陶瓷微珠吸波材料的制备与性能研究

Study on the Preparation and Properties of Co-Zn Doped W-type Barium Ferrite Hollow Ceramic Microsphere Absorbing Materials

首先以Fe＋Fe2O3＋Zn O＋Co＋Ba CO3为反应体系,KCl O4为营养剂制备团聚粉。用自反应淬熄法并结合热处理工艺制备了Co-Zn掺杂的W型钡铁氧体空心陶瓷微珠。接着通过SEM、EDS、XRD等手段,表征了空心陶瓷微珠的形貌、成分和结构。最后通过网络矢量分析仪测试电磁参数并分析其吸波性能。实验结果表明：自反应淬熄法及1300℃热处理后得到的产物基本为单一的六角片状Ba（Zn0.7Co0.3）2Fe16O27空心陶瓷微珠。空心陶瓷微珠在3~5 GHz和9~12 GHz表现出明显的磁损耗峰,当样品的厚度为3 mm时,在10.6 GHz处吸收峰值最低为-14d B,小于-10 d B的有效吸收带宽为2 GHz,Co-Zn掺杂的W型钡铁氧体空心陶瓷微珠在实现轻质化的同时具有良好的微波吸收性能与应用前景。

Agglomerated powder was prepared using Fe ＋ Fe2O3＋ Zn O ＋ Co ＋ Ba CO3 as a reaction system and KCl O4 as nutritional agents. The Co-Zn doped W-type barium ferrite hollow ceramic microspheres were prepared by self- reaction quenching technique combining with the technology for heating processing. The morphology,composition and structure of the hollow ceramic microspheres were later characterized by means of SEM,EDS,XRD. Finally,its electromagnetic parameters and wave absorption performance were tested and analyzed with the vector network analyzer. Experimental results show that the products gained by the self-reaction quenching method and heat treatment of 1300 ℃ are basically hollow ceramic microspheres Ba（ Zn0. 7Co0. 3）2Fe16O27with hexagonal flake. The cenospheres would reach an obvious peak of magnetic loss at 3-5 GHz and 9-12 GHz. When the thickness of the sample is 3 mm,the minimum absorption peak at 10. 6 GHz is- 14 d B and the effective absorption bandwidth less than-10 d B is 2 GHz. Co-Zn doped W-type barium ferrite hollow ceramic microspheres have a good performance of microwave absorption and a promising application with an implementation of lighterquality.