Microwave Dielectric Properties of CCTO/PVA Composites
The CaCu3Ti4O12 (CCTO) ceramic powder was inserted in the polyvinyl alcohol (PVA) polymeric matrix, with an increasing weight fraction of the filler, to form a flexible and high dielectric constant composite at the GHz region. The structural characterization of the samples was performed using X-ray...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/6067519 |
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| author | M. P. F. Graça K. D. A. Sabóia F. Amaral L. C. Costa |
| author_facet | M. P. F. Graça K. D. A. Sabóia F. Amaral L. C. Costa |
| author_sort | M. P. F. Graça |
| collection | DOAJ |
| description | The CaCu3Ti4O12 (CCTO) ceramic powder was inserted in the polyvinyl alcohol (PVA) polymeric matrix, with an increasing weight fraction of the filler, to form a flexible and high dielectric constant composite at the GHz region. The structural characterization of the samples was performed using X-ray diffraction and scanning electron microscopy (SEM). The complex permittivity was calculated by the small perturbation theory using two resonant cavities (2.7 GHz and 5.0 GHz). Several classical models (Maxwell Garnett, Lichtenecker, effective medium theory (EMT), and Yamada) were used to fit the real part of the complex permittivity of the composite as a function of the weight fraction of CCTO powder inserted in the PVA matrix. The best predictions for the dielectric behavior of these samples were obtained with the EMT and Yamada models. |
| format | Article |
| id | doaj-art-fb5615330a1c470382fce7f2dcf87b34 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-fb5615330a1c470382fce7f2dcf87b342025-02-03T01:07:14ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/60675196067519Microwave Dielectric Properties of CCTO/PVA CompositesM. P. F. Graça0K. D. A. Sabóia1F. Amaral2L. C. Costa3I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, PortugalUniversidade Estadual do Ceará, Fortaleza, BrazilI3N and Physics Department, University of Aveiro, 3810-193 Aveiro, PortugalI3N and Physics Department, University of Aveiro, 3810-193 Aveiro, PortugalThe CaCu3Ti4O12 (CCTO) ceramic powder was inserted in the polyvinyl alcohol (PVA) polymeric matrix, with an increasing weight fraction of the filler, to form a flexible and high dielectric constant composite at the GHz region. The structural characterization of the samples was performed using X-ray diffraction and scanning electron microscopy (SEM). The complex permittivity was calculated by the small perturbation theory using two resonant cavities (2.7 GHz and 5.0 GHz). Several classical models (Maxwell Garnett, Lichtenecker, effective medium theory (EMT), and Yamada) were used to fit the real part of the complex permittivity of the composite as a function of the weight fraction of CCTO powder inserted in the PVA matrix. The best predictions for the dielectric behavior of these samples were obtained with the EMT and Yamada models.http://dx.doi.org/10.1155/2018/6067519 |
| spellingShingle | M. P. F. Graça K. D. A. Sabóia F. Amaral L. C. Costa Microwave Dielectric Properties of CCTO/PVA Composites Advances in Materials Science and Engineering |
| title | Microwave Dielectric Properties of CCTO/PVA Composites |
| title_full | Microwave Dielectric Properties of CCTO/PVA Composites |
| title_fullStr | Microwave Dielectric Properties of CCTO/PVA Composites |
| title_full_unstemmed | Microwave Dielectric Properties of CCTO/PVA Composites |
| title_short | Microwave Dielectric Properties of CCTO/PVA Composites |
| title_sort | microwave dielectric properties of ccto pva composites |
| url | http://dx.doi.org/10.1155/2018/6067519 |
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