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通过化学原位聚合法合成了间甲苯胺/Ba0.8La0.2Fe10Al2O19(PMT/BLFA)和间甲苯胺-苯胺共聚物/Ba0.8La0.2Fe10-Al2O19复合物(PMT-co-PANI/BLFA).用TG-DTA,XRD,FT-IR,UV-Vis,TEM和SEM表征了产物的结构和微观形貌,用振动样品磁强计和阻抗材料分析仪测定了产物的磁性和介电性能.结果表明,共聚物(聚合物)链对BLFA粒子的包覆,使复合物具有明显的核/壳结构,且比共聚物(聚合物)具有更高的热稳定性;复合物的饱和磁化强度明显小于BLFA,而矫顽力的变化不大;由于电介质和磁介质之间的协同作用使PMT/BLFA和PMT-co-PANI/BLFA复合物具有良好的介电损耗和磁损耗性能,是一类有较好应用前景的电磁波吸收材料.
The m-Toluidine / Ba0.8La0.2Fe10Al2O19 (PMT / BLFA) and m-Toluidine-Aniline copolymer / Ba0.8La0.2Fe10-Al2O19 composite (PMT-co-PANI / BLFA) were synthesized by chemical in situ polymerization. The structure and morphology of the product were characterized by TG-DTA, XRD, FT-IR, UV-Vis, TEM and SEM. The magnetic and dielectric properties of the product were measured by vibrating sample magnetometer and impedance material analyzer. It shows that the BLFA particles are coated by the copolymer (polymer) chains, which makes the composites have obvious core / shell structure and higher thermal stability than the copolymer (polymer). The saturation magnetization of the composites is obvious Is smaller than that of BLFA, and the coercivity does not change much. Due to the good dielectric loss and magnetic loss properties of PMT / BLFA and PMT-co-PANI / BLFA composites due to the synergistic effect of dielectric and magnetic media, Have better application prospects of electromagnetic wave absorption material.