%0 Journal Article
%T Microwave Absorbing Properties of W-Type Hexaferrite Ba(MnZn)<sub>x</sub>Co<sub>2(1-x)</sub>Fe<sub>16</sub>O<sub>27</sub>
%A Xianming Qin
%A Ying Cheng
%A Kesheng Zhou
%A Shengxiang Huang
%A Xia Hui
%J Journal of Materials Science and Chemical Engineering
%P 8-13
%@ 2327-6053
%D 2013
%I Scientific Research Publishing
%R 10.4236/msce.2013.14002
%X <p class=\"MsoNormal\">
	MnZn-doped W-type barium cobalt ferrite powder composites of Ba(MnZn)<sub>x</sub>Co<sub>2(1-x)</sub>Fe<sub>16</sub>O<sub>27</sub> (x = 0.1, 0.2, 0.3, 0.4, and 0.5) were prepared in a sol-gel process. The microwave absorbing properties of the composites in the range of 2 - 18 GHz and their electromagnetic loss mechanisms were studied. The results demonstrated that the synthesized Ba(MnZn)<sub>x</sub>Co<sub>2(1-x)</sub>Fe<sub>16</sub>O<sub>27 </sub>samples possess a W-type phase of the crystal structure with a hexagonal flaky shape in micro-morphology, and the samples exhibited a soft magnetic trait that enables improving their microwave absorption properties through suitable MnZn doping. For Ba(MnZn)<sub>0.4</sub>Co<sub>1.2</sub>Fe<sub>16</sub>O<sub>27</sub> with a thickness of <?xml:namespace prefix = st1 /><st1:chmetcnv w:st=\"on\" unitname=\"mm\" sourcevalue=\"2.8\" hasspace=\"True\" negative=\"False\" numbertype=\"1\" tcsc=\"0\"><st1:metricconverter w:st=\"on\" productid=\"2.8 mm\">2.8 mm</st1:metricconverter></st1:chmetcnv>, the reflection loss peak was -40.7 dB at a frequency of 7.3 GHz, with a bandwidth of 6.6 GHz at a loss of less than -10 dB. The microwave absorption primarily resulted from magnetic losses caused by magnetization relaxation, domain wall resonance, and natural resonance.
</p>
%K Sol-Gel Process
%K W-Type Ferrite
%K Microwave Absorbing Materials
%K Electromagnetic Loss
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=36583