论文部分内容阅读
本文研究了玻璃包覆非晶微丝FeCoMnSiB在微波频段的电磁特性.用X射线衍射技术分析了退火前微丝和不同温度退火后微丝的组织结构.分析结果表明,铁基微丝在退火前的组织是由纳米晶和非晶混合组成的,经过465～550℃等温退火1.h后,微丝内部组织和电磁特性都发生了改变.把退火前和经过不同温度退火处理过的微丝按一定配比分别散乱混合在石蜡基体里制成同轴样品,采用矢量网络分析仪测试微丝在2.GHz到18.GHz频段的复介电常数和复磁导率,同时模拟计算不同厚度单层吸波涂层的反射吸收率.由退火前微丝填充组成的涂层中,最小反射率可达-30dB;当微丝经过490℃等温退火后,不同厚度涂层的反射率曲线出现了不止一个吸收峰,而且有的曲线上的吸收峰同时都小于-10dB,吸波的频率范围变宽.结果表明,玻璃包覆铁基微丝可作为电磁损耗材料,具有良好的微波吸收特性.
In this paper, the electromagnetic properties of glass-coated amorphous microfilament FeCoMnSiB in the microwave frequency band were studied.The microstructures of the microfilaments before annealing and after annealing at different temperatures were analyzed by X-ray diffraction.The results show that the microstructure of the Fe- The former tissue consisted of a mixture of nanocrystalline and amorphous, and the internal microstructure and electromagnetic properties of the microfilaments changed after annealing at 465 ~ 550 ℃ for 1.h.At the same time, Silk by a certain ratio were scattered mixed in paraffin matrix made of coaxial samples, the use of vector network analyzer to test microfilament 2.GHz to 18.GHz frequency complex permittivity and permeability, while the simulation is different Reflectance of the thickness of the monolayer absorbing coating Reflectance curve of the coating with different thickness before annealing is up to -30dB There are more than one absorption peak, and some absorption peaks on the curve are less than -10dB at the same time, the frequency range of absorbing wave broadens.The results show that the glass-coated iron-based microfilament can be used as electromagnetic loss material, has good microwave absorption characteristic.