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dc.contributor.advisorÇelik, Erdal
dc.contributor.authorERTUŞ, Emre Burak
dc.date.accessioned2019-07-09T13:30:37Z
dc.date.available2019-07-09T13:30:37Z
dc.date.issued2014-08-08
dc.identifier.urihttps://hdl.handle.net/20.500.12498/907
dc.description.abstractThe frequency range 8–12 GHz in electromagnetic spectrum is named microwave region and uses in the field of airport radar applications. Radar Cross Section (RCS) is a measure of how detectable an object is with radar and a larger RCS indicates that an object is more easily detected. Radar absorbing materials (RAM) reduce the electromagnetic energy reflected back to the radar by means of absorption thence RCS diminishes. The technique of RAM based on, lossy characteristics of dielectric or magnetic materials that present the appropriate impedance matching or attenuates the radar wave once it enters the material. In this thesis, barium hexaferrite powders were produced by sol-gel method. Titanium and Lanthanum elements were substituted to the raw materials with appropriate stoichiometric ratios to obtain doped barium hexaferrite powders. After pre-heat treatment process, the produced xerogels were characterized with FTIR in order to investigate the nature of the chemical bonds formed and DTA-TG analysis for define thermal behavior of dry gels. After final sintering process, X-ray Diffractometry (XRD) and X-ray Photoelectron Spectroscopy (XPS) were used for phase identification and elemental analysis of produced powders respectively. In order to examine the particle morphology of powders, scanning electron microscopy (SEM) was used. Finally Vibrating Sample Magnetometer (VSM) was utilized to investigate the magnetic properties of barium hexaferrite powders. After characterization of the synthesized powders, they were mixed with polyester resin by the weight rate fifty percent. 4.5 mm thick composite samples were produced by resin casting method. The composite samples were characterized to determine their microwave absorbing properties through Vector Network Analyzer (VNA) in the range of 8-12 GHz. It was concluded that composite samples have satisfactory electromagnetic wave absorbing abilities.en_US
dc.language.isoen_USen_US
dc.publisherGraduate School of Natural and Applied Sciences of Dokuz Eylül Universityen_US
dc.subjectRadar absorbing materials, magnetic ceramics, barium hexaferrite, sol-gelen_US
dc.titlePRODUCTION, CHARACTERIZATION AND INDUSTRIAL APPLICATIONS OF RADAR ABSORBING MATERIALSen_US
dc.typeThesisen_US


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