【摘要】：采用固相法制備了BaM和Mn-Co-Zr三元離子摻雜BaM(BaFe_(9.6)Mn_(0.6)Co_(0.6)Zr_(1.2)O_(19))粉體,并考察了燒結(jié)溫度和摻雜對BaM結(jié)構(gòu)和磁性的影響。利用X射線衍射儀(XRD)和掃描電鏡(SEM)對其結(jié)構(gòu)和形貌進行表征,結(jié)果表明,摻雜前后粉體均為純相M型鋇鐵氧體,摻雜有利于顆粒細(xì)化,且尺寸均勻,最佳燒結(jié)溫度為1 300℃。采用振動樣品磁強計(VSM)和矢量網(wǎng)絡(luò)分析儀(VNA)測定其靜態(tài)和動態(tài)磁性能,VSM結(jié)果表明,Mn-Co-Zr摻雜使BaM從典型永磁材料變?yōu)檐洿挪牧?矯頑力最低為50.4 Oe。軟磁化的BaM仍然比尖晶石鐵氧體具有更高的磁各向異性,VNA測試發(fā)現(xiàn),燒結(jié)溫度1 250℃的摻雜BaM其共振頻率高達(dá)16 GHz,擬合得到最強電磁波吸收在14.3 GHz達(dá)到-57.6 d B。
[Abstract]:BaM (BaFe_ (9.6) Mn_ (0.6) Co_ (0.6) Zr_ (1.2) O _ (19) powders doped with BaM and Mn-Co-Zr ternary ions were prepared by solid phase method. The effects of sintering temperature and doping on the structure and magnetic properties of BaM were investigated. X-ray diffractometer (XRD) and scanning electron microscope (SEM) were used to characterize its structure and morphology. The results showed that the powders were pure M-type barium ferrite before and after doping, and doping was advantageous to fine particle size and uniform size. The optimum sintering temperature was 1 300 鈩，

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