A COMPARISON ON RADAR ABSORBING PROPERTIES OF NANO AND MICRO-SCALE BARIUM HEXAFERRITE POWDERS REINFORCED POLYMERIC COMPOSITES

Year 2016, Volume: 2 Issue: 1, 88 - 92, 09.06.2016

Hüsnügül Yılmaz Atay

https://doi.org/10.22531/muglajsci.269979

Cited By: 2

Abstract

It has been highlighted the usage of barium hexaferrite as a radar absorbing material in the polymer composites in our previous works. With this respect in this study, finer barium hexaferrite powders were obtained, and a comparison has been done on the radar absorbing properties by means of usage of micro and Nano-size powders reinforced composite coatings. Barium hexaferrite powders were synthesized by Sol-Gel method in Nano-size with the hexagonal molecular structure obtained powders were added to a polyurethane resin to interpolate radar absorbing property with different loading levels. Later on, metal substrates were coated with those polymeric composites. Besides characterization tests, such as particle size analysis, X-Ray Diffraction, Scanning Electron Microscopy (SEM), scratch test, radar absorbing test were performed with a Network Analyzer to indicate electromagnetic properties of barium hexaferrite reinforced composites. It was concluded that increasing barium hexaferrite powder amount in the composites increased radar absorbing performance. Additionally, by decreasing BaFe₁₂O₁₉ powder size to Nano scale, improved radar absorbing properties were obtained.

Keywords

Radar absorbing materials, Barium hexaferrite, Nanotechnology, Polymer composites, Coatings

MIKRO VE NANO-BOYUTLU BARYUM HEKZAFERRIT TOZLARI ILE TAKVIYE EDILMIŞ POLIMER KOMPOZITLERIN RADAR ABZORBLAYICI ÖZELLIKLERI ÜZERINE BIR KARŞILAŞTIRMA

Abstract

Önceki
çalışmalarımızda baryum hekzaferritin polimer kompozit  malzemelerde radar emici olarak kullanımı belirtilmiştir.
Bu bağlamda bu çalışmada daha ince baryum hekzaferrit tozlar elde edilmiş, ve mikro
ve nano-boyutlu tozlar ile takviye edilmiş kompozit kaplamaların radar emici
özelliklerine dair bir karşılaştırma yapılmıştır. Baryum hekzaferrit tozları Sol-Gel
yöntemi ile nano-boyutta ve altıgen bir moleküler yapıya sahip şekilde
sentezlenmiş, elde edilen tozlar radar emici özelliği elde etmek için farklı oranlarda
bir poliüretan reçinesine ilave edilmiştir.  Daha sonra metal altlıklar bu polimerik
kompozitler ile kaplanmıştır. Boyut analizi, XRD, SEM, kazıma testi gibi
karakterizasyon tekniklerinin yanında barium hekzaferrit ile güçlendirilmiş
kompozitlerin elektromanyezit özelliğinin bir Netwotk-Analiz cihazı ile ölçümü
gerçekleştirilmiştir. Kompozitlerde baryum hekzaferrit toz miktarının artırılmasıyla
radar emici performansın da arttığı sonucuna varılmıştır. Ayrıca, BaFe₁₂O₁₉ partiküllerin boyutunun Nano seviyelerine
indirilmesiyle daha iyi radar absorblayıcı özellik elde edilmiştir.

Keywords

Radar abzaoblayan malzemeler, Baryum hekzaferrit, Nanoteknoloji, Polimer kompozitler, Kaplamalar

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