Studies on interaction of electromagnetic waves with barium hexaferrite ceramics

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2008

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Gürkan, Nurdan

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M-type barium hexaferrite powders doped with titanium and/or cobalt have been synthesized according to the stochiometric formulations BaFe(12 (4/3)x)TixO19, BaFe12-xCoxO19 , BaFe12-2xTixCoxO19 (x varying from 0 to 1.5 with an increment of 0.5) by the mixed oxide approach. The powders were used to manufacture small ceramic tiles by sintering each composition at 1250 °C with soaking times ranging from 1 to 16 hours. XRD work revealed formation of the magnetoplumbite crystal structure in all ceramics. The variations in processing parameters led to differences in microstructure and various dielectric and magnetic properties of the ceramic tiles. The interaction of the ceramics with electromagnetic waves was characterized by using a vector network analyzer in the X and Ku bands. The results revealed that, undoped barium hexaferrite ceramics and those doped with low titanium exhibited good microwave absorption properties.

Subject Keywords

Metallurgical and Materials Engineering., Barium Hexaferrite.

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http://etd.lib.metu.edu.tr/upload/3/12609613/index.pdf
https://hdl.handle.net/11511/18130

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

N. Gürkan, “Studies on interaction of electromagnetic waves with barium hexaferrite ceramics,” M.S. - Master of Science, Middle East Technical University, 2008.