CAJ | 학술논문

通过熔炼法制备 FeSiAl 合金块体，破碎后利用球磨机进行扁平化处理，得到扁平化的 FeSiAl 合金粉体，采用化学共沉淀法在其表面生成 NiZn 氢氧化物。然后通过反应釜水热法在 FeSiAl 合金粉末表面生成 NiZn 铁氧体，最后在真空中进行500℃热处理使铁氧体生长更加完全。研究了 NiZn 铁氧体粉体包覆 FeSiAl 合金复合材料的电磁性能。测试和仿真表明，相对于 FeSiAl 合金粉体复合材料介电常数下降明显，而复磁导率变化不大，作为吸波材料提高了阻抗匹配特性。因而，在 FeSiAl 合金粉体上包覆 NiZn 铁氧体，可显著改善 FeSiA 合金粉体的吸波性能。
통과용련법제비 FeSiAl 합금괴체，파쇄후이용구마궤진행편평화처리，득도편평화적 FeSiAl 합금분체，채용화학공침정법재기표면생성 NiZn 경양화물。연후통과반응부수열법재 FeSiAl 합금분말표면생성 NiZn 철양체，최후재진공중진행500℃열처리사철양체생장경가완전。연구료 NiZn 철양체분체포복 FeSiAl 합금복합재료적전자성능。측시화방진표명，상대우 FeSiAl 합금분체복합재료개전상수하강명현，이복자도솔변화불대，작위흡파재료제고료조항필배특성。인이，재 FeSiAl 합금분체상포복 NiZn 철양체，가현저개선 FeSiA 합금분체적흡파성능。
FeSiAl bulk alloys were prepared by melt and flake FeSiAl alloy powders were prepared by subsequently cracking and milling, then NiZn hydroxide was synthesized on the surface of FeSiAl alloy powders by chemical co-precipitation method. NiZn hydroxide was transformed to NiZn spinel-ferrite by hydrothermal method, then NiZn spinel-ferrite grows more fully by 500℃ heat treatment in vacuum. Electromagnetic properties of the composite materials were investigated. The test and simulation results showed that, the dielectric constant of the composite materials decreases obviously and the complex permeability does not change obviously compared to that of FeSiAl alloy, and consequently the impedance matching was improved as absorbing material. Thus, absorptivity of FeSiAl alloy powders coated with NiZn ferrite is greatly improved.