REFLECTIVITY OF HYBRID MICROWAVE ABSORBERS BASED ON NIZN FERRITE AND CARBON BLACK DOI 10.5028/jatm.2012.04032512
This study had as main objective to show that the adequate combination of magnetic and dielectric particles can improve the radar absorbing materials performance. For this, formulations of polyurethane resin loaded with carbon black and NiZn ferrite, with general composition MFe2O4, where M = Ni, Zn...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Instituto de Aeronáutica e Espaço (IAE)
2012-10-01
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| Series: | Journal of Aerospace Technology and Management |
| Subjects: | |
| Online Access: | https://www.jatm.com.br/jatm/article/view/167 |
| _version_ | 1811287234189459456 |
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| author | Josiane de Castro Dias Inácio Malmonge Martin Mirabel Cerqueira Rezende |
| author_facet | Josiane de Castro Dias Inácio Malmonge Martin Mirabel Cerqueira Rezende |
| author_sort | Josiane de Castro Dias |
| collection | DOAJ |
| description | This study had as main objective to show that the adequate combination of magnetic and dielectric particles can improve the radar absorbing materials performance. For this, formulations of polyurethane resin loaded with carbon black and NiZn ferrite, with general composition MFe2O4, where M = Ni, Zn or both elements, homogenized by conventional mechanical mixture, were prepared. Reflectivity measurements of different coating formulations applied on aluminum flat plates (1.0 ± 0.1 mm-thickness) were performed using the Naval Research Laboratory arch technique, in the X-band frequency range. X-ray diffraction and magnetic susceptibility evolution analyses of the tested ferrite showed that this magnetic additive presents different phases. Attenuation values of ~4 dB (~60% of the wave absorption) for the polyurethane/carbon black/ferrite formulation, 49/1/50 in wt.%, respectively, were found. This low attenuation values (~4 dB) is attributed to the presence of different phases in the NiZn ferrite, as shown by both the X-ray pattern and the magnetic susceptibility analyses, and also to the thickness and the additives concentration used. As main result, this study shows that the adequate combination of carbon black and NiZn ferrite improves the processed radar absorbing materials performance due to the adequate adjustment of the impedance matching, which favors the microwave absorber-electromagnetic wave interaction. |
| first_indexed | 2024-04-13T03:13:55Z |
| format | Article |
| id | doaj.art-42b48ca2337e4e2ba6439691a10034d7 |
| institution | Directory Open Access Journal |
| issn | 2175-9146 |
| language | English |
| last_indexed | 2024-04-13T03:13:55Z |
| publishDate | 2012-10-01 |
| publisher | Instituto de Aeronáutica e Espaço (IAE) |
| record_format | Article |
| series | Journal of Aerospace Technology and Management |
| spelling | doaj.art-42b48ca2337e4e2ba6439691a10034d72022-12-22T03:04:57ZengInstituto de Aeronáutica e Espaço (IAE)Journal of Aerospace Technology and Management2175-91462012-10-0143REFLECTIVITY OF HYBRID MICROWAVE ABSORBERS BASED ON NIZN FERRITE AND CARBON BLACK DOI 10.5028/jatm.2012.04032512Josiane de Castro Dias0Inácio Malmonge Martin1Mirabel Cerqueira Rezende2Instituto Tecnológico de Aeronáutica São José dos Campos - SPInstituto Tecnológico de Aeronáutica São José dos Campos - SPInstituto de Aeronáutica e Espaço São José dos Campos - SPThis study had as main objective to show that the adequate combination of magnetic and dielectric particles can improve the radar absorbing materials performance. For this, formulations of polyurethane resin loaded with carbon black and NiZn ferrite, with general composition MFe2O4, where M = Ni, Zn or both elements, homogenized by conventional mechanical mixture, were prepared. Reflectivity measurements of different coating formulations applied on aluminum flat plates (1.0 ± 0.1 mm-thickness) were performed using the Naval Research Laboratory arch technique, in the X-band frequency range. X-ray diffraction and magnetic susceptibility evolution analyses of the tested ferrite showed that this magnetic additive presents different phases. Attenuation values of ~4 dB (~60% of the wave absorption) for the polyurethane/carbon black/ferrite formulation, 49/1/50 in wt.%, respectively, were found. This low attenuation values (~4 dB) is attributed to the presence of different phases in the NiZn ferrite, as shown by both the X-ray pattern and the magnetic susceptibility analyses, and also to the thickness and the additives concentration used. As main result, this study shows that the adequate combination of carbon black and NiZn ferrite improves the processed radar absorbing materials performance due to the adequate adjustment of the impedance matching, which favors the microwave absorber-electromagnetic wave interaction. https://www.jatm.com.br/jatm/article/view/167CoatingsRadar absorbing materialsRAMNiZn ferritesCarbon black. |
| spellingShingle | Josiane de Castro Dias Inácio Malmonge Martin Mirabel Cerqueira Rezende REFLECTIVITY OF HYBRID MICROWAVE ABSORBERS BASED ON NIZN FERRITE AND CARBON BLACK DOI 10.5028/jatm.2012.04032512 Journal of Aerospace Technology and Management Coatings Radar absorbing materials RAM NiZn ferrites Carbon black. |
| title | REFLECTIVITY OF HYBRID MICROWAVE ABSORBERS BASED ON NIZN FERRITE AND CARBON BLACK DOI 10.5028/jatm.2012.04032512 |
| title_full | REFLECTIVITY OF HYBRID MICROWAVE ABSORBERS BASED ON NIZN FERRITE AND CARBON BLACK DOI 10.5028/jatm.2012.04032512 |
| title_fullStr | REFLECTIVITY OF HYBRID MICROWAVE ABSORBERS BASED ON NIZN FERRITE AND CARBON BLACK DOI 10.5028/jatm.2012.04032512 |
| title_full_unstemmed | REFLECTIVITY OF HYBRID MICROWAVE ABSORBERS BASED ON NIZN FERRITE AND CARBON BLACK DOI 10.5028/jatm.2012.04032512 |
| title_short | REFLECTIVITY OF HYBRID MICROWAVE ABSORBERS BASED ON NIZN FERRITE AND CARBON BLACK DOI 10.5028/jatm.2012.04032512 |
| title_sort | reflectivity of hybrid microwave absorbers based on nizn ferrite and carbon black doi 10 5028 jatm 2012 04032512 |
| topic | Coatings Radar absorbing materials RAM NiZn ferrites Carbon black. |
| url | https://www.jatm.com.br/jatm/article/view/167 |
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