Sm3 掺杂Co2Z型铁氧体的组织结构和吸波性能

Microstructures and microwave absorbing properties of Sm3 doped Co2Z-type hexagonal ferrite

摘要:

采用普通陶瓷工艺制备了Sm3 掺杂的Co2Z型平面六角铁氧体，研究了Sm3 掺杂Co2Z型铁氧体材料的组织结构和吸波性能。结果表明，掺杂一定量Sm3 的铁氧体相结构仍以Co2Z型六角晶系相为主相，但出现了呈颗粒状弥散分布的富Sm相。掺杂Sm3 样品的吸波性能明显优于未掺杂Sm3 样品，在频率为6.3GHz时，其最大反射损耗可达到-20dB，耗损大于10dB 的频带带宽为5GHz，具有较宽的吸收频带。吸波涂层的附着力均大于10MPa，具有良好的力学性能。

Abstract:

The Sm3 doped Co2Z-type hexagonal ferrite materials were prepared by the conventional ceramic method and the microstructures and microwave absorbing properties of the materials were investigated. The influence of a certain amount of Sm3 addition on structures and microwave absorbing properties of the materials were investigated. The results show that Co2Z-type hexaferrite is still main phase in the Co2Z ferrite materials doped with Sm3 . It is observed that Sm-rich phase with granular morphology is dispersed in the main phase. The Sm3 doped Co2Z ferrite exhibited better microwave absorbing properties than the Sm3 undoped one. The maximum reflection loss of Sm3 doped Co2Z ferrite reached -20dB at 6.3GHz，and the frequency bandwidth of reflection loss more than 10 dB was 5GHz. The wave absorbing coating had good mechanical property and the adhesions of the coatings were higher than 10MPa.