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Published in:
01-07-2015
Sol–gel synthesis of copper(II) and titanium(IV) ions co-doped barium ferrite submicrometer crystals and their microwave absorption performance
Published in: Journal of Materials Science: Materials in Electronics | Issue 7/2015
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Abstract
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 barium hexagonal ferrite was formed. From the field emission scanning electron microscopy images, hexagon shaped grains could be obviously observed in Ba(CuTi)xFe12−2xO19 when x = 0.5, but its morphology tended to be irregular when x ≥ 0.75. In addition, the inductively coupled plasma atomic emission spectrometry test revealed that the doping limit of x was 0.75. Based on the electromagnetic parameters measured by the vector net-analyzer in the frequency of 2–18 GHz, the maximum reflection loss value of −37 dB at 16.7 GHz was observed for Ba(CuTi)xFe12−2xO19 (x = 0.75) with a matching thickness of 1.6 mm. Therefore, Ba(CuTi)xFe12−2xO19 may be a good candidate as the microwave absorbing material for the applications in the field of high frequency.