Sol–gel synthesis of copper(II) and titanium(IV) ions co-doped barium ferrite submicrometer crystals and their microwave absorption performance

摘要: Copper(II)–titanium(IV)-doped barium ferrite (Ba(CuTi)xFe12−2xO19, x = 0, 0.5, 0.75, 1, 1.25) were prepared by the sol–gel method. The X-ray diffraction patterns of Ba(CuTi)xFe12−2xO19 proved that M-type hexagonal was formed. From field emission scanning electron microscopy images, hexagon shaped grains could be obviously observed in when x = 0.5, but its morphology tended to irregular x ≥ 0.75. In addition, inductively coupled plasma atomic spectrometry test revealed doping limit x 0.75. Based on electromagnetic parameters measured vector net-analyzer frequency 2–18 GHz, maximum reflection loss value −37 dB at 16.7 GHz for (x = 0.75) with a matching thickness 1.6 mm. Therefore, may good candidate as microwave absorbing material applications high frequency.