Microwave absorption properties of Co, Cu, Zn: substituted hexaferrite polychloroprene nanocomposites

Caffarena, Valeska da Rocha; Capitaneo, Jefferson Leixas; Ogasawara, Tsuneharu; Pinho, Marcelo

doi:10.1590/s1516-14392008000300017

Cited by 17 publications

(12 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…At present, a large amount of work has been done to investigate its electromagnetic properties by changing the method of preparation (such as solid-state reaction method, sol-gel method, and molten-salt synthesis), chemical composition, additive, sintering temperature, time, etc. [5][6][7][8]. Although there are some reports about the effects of doped elements on the magnetic properties of Co 2 Z ferrite, systematic study for the effects of rare-earth ions on the microstructure and magnetic properties of Co 2 Z ferrites has been scarcely reported.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic and microwave absorbing properties of Co2Z-type hexaferrites doped with La3+

Yang²,

Zou³

et al. 2009

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Electromagnetic and microwave absorbing properties of Co2Z-type hexaferrites doped with La3+

Yang²,

Zou³

et al. 2009

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

“…Absorpsiyon kapasitesinin dalga kılavuzu yöntemiyle ölçülebilmesi için toz halindeki RAM'ın pigment kısmının kaplama haline getirilmesi gerekmektedir [12][13][14][15][16][17] [12][13][14][15][16][17]. Bu nedenle, optimimum boya kalınlığı tespiti için boyanın 1,0 ve 3,0 mm olarak uygulanmasına karar verilmiştir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Boya Özelli̇kleri̇ni̇n Radar Absorpsi̇yon Kapasi̇tesi̇ne Etki̇si̇

Aktaş

Gürü³

2016

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

View full text Add to dashboard Cite

ÖZETRadar absorpsiyon malzemeleri (RAM); radar tarafından gönderilen elektromanyetik dalganın bir kısmını soğurarak malzemenin radarda tespitini güçleştiren malzemelerdir. Yapılan çalışmada; boya özelliklerinden bağlayıcı türünün ve boya kalınlığının demir esaslı pigment kullanılarak hazırlanan RAM üzerindeki etkileri araştırılmıştır. Çalışmanın amacı; hem yüksek sıcaklık dayanımı olan hem de uluslararası standartlarda RAM olarak kullanılabilecek boya üretmektir. En uygun bağlayıcının tespit edilmesinde hem sıcaklık dayanımı hem de absorpsiyon kapasitesi incelenmiştir. Demir esaslı pigmentin boya haline getirilebilmesinde yüksek sıcaklık dayanımı da amaçlandığı için silikon esaslı bağlayıcının kullanılmasına karar verilmiştir. Hazırlanan boya hem 18-40 GHz aralığında yaklaşık -16 dB absorpsiyon yaptığı hem de 570 0 C'a kadar özelliklerini koruduğu için yüksek sıcaklığa dayanıklı RAM olarak kullanılabileceği değerlendirilmiştir. Yapılan analiz neticesinde boya kalınlığının da uygulanacak yere göre seçilmesinin uygun olacağı tespit edilmiştir.Anahtar Kelimeler: Demir esaslı RAM, yüksek sıcaklık dayanımı, curie sıcaklığı EFFECT OF PAINT PROPERTIES ON RADAR ABSORPTION CAPACITY ABSTRACTRadar absorption material (RAM); absorbs a portion of electromagnetic waves transmitted by radar and make it difficult to be detected by radar. In this study, paint properties, binder type and thickness of paint, impact on the iron based RAM were investigated. The aim of this study is to produce high temperature resistant paint which also counted as RAM in international standards. Both temperature resistant and absorption capacity were examined to determine most suitable binder for iron based RAM paint. Because of high temperature resistance most suitable binder was chosen as silicon based binder. Produced paint absorbs -16 dB at 18-40 frequency bands as well as resistant to 570 0 C, so it was evaluated as high temperature resistant RAM. According to the analysis results; appropriate paint thickness should be chosen according to the application area.

show abstract

“…Single layer absorbers have narrow bandwidth and are unsuitable for combating wideband radar systems [7][8][9][10][11][12]. So wideband microwave absorbers are required.…”

Section: Introductionmentioning

confidence: 99%

Chebyshev multi-layer microwave absorber design

Salleh

Yahya

Awang³

et al. 2013

2013 IEEE International RF and Microwave Conference (RFM)

View full text Add to dashboard Cite

This paper presents the use of Chebychev transformer in the design of multi-layer microwave absorbers constructed of coconut shells. The two, three and four multi-layer absorbers were modelled based on measured permittivity. The permittivity were obtained using microwave non-destructive testing (MNDT) from previous experiment. Then the permittivity of each layer was calculated using Chebychev multi-section transformer to provide a proper transition impedance. These microwave absorbers were modelled and simulated in MATLAB. The simulations were carried out from 1 GHz to 15 GHz to analyse the absorbers performance. The twolayer absorbers showed the multiple resonant frequencies.The permittivity of back layer influences the resonant frequency. A higher permittivity reduces the resonant frequency to a lower value. The two and three-layer absorbers showed an excellent bandwidth up to 110% and 120% respectively. The bandwidth can be improved by adding more layers to provide a smooth transition impedance between layers.Index Terms-Radar absorbing material, multilayer absorber, microwave absorber.

show abstract

Microwave absorption properties of Co, Cu, Zn: substituted hexaferrite polychloroprene nanocomposites

Cited by 17 publications

References 11 publications

Electromagnetic and microwave absorbing properties of Co2Z-type hexaferrites doped with La3+

Electromagnetic and microwave absorbing properties of Co2Z-type hexaferrites doped with La3+

Boya Özelli̇kleri̇ni̇n Radar Absorpsi̇yon Kapasi̇tesi̇ne Etki̇si̇

Chebyshev multi-layer microwave absorber design

Contact Info

Product

Resources

About