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Analysis of the complex dielectric permittivity behavior of porous Al2O3–SiC composites in the 1 MHz to 18 GHz frequency range

Published online by Cambridge University Press:  31 January 2011

J. Battat  and
J.P. Calame
J. Battat
Affiliation:
Naval Research Laboratory, Washington, DC 20375
J.P. Calame
Affiliation:
Naval Research Laboratory, Washington, DC 20375
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Abstract

The complex dielectric permittivity of electrically lossy, porous Al2O3–SiC composites was measured as a function of frequency over the range of 0.001 to 18 GHz. These composites were fabricated by an infusion method of incorporating SiC polymer precursor into porous alumina disks. Repeat polymer infusions and pyrolysis steps to 1000 °C were carried out, with some samples undergoing an additional air fire prior to each subsequent step. Generally, it was found that for non-air-fired samples, moderate, controllable losses were attainable over a broad frequency range. By contrast, the dielectric loss attainable for air-fired samples was generally very low. For all samples, various aspects of the variation of permittivity components ϵ′ and ϵ″ with frequency were analyzed, with a view to determine the various factors contributing to dielectric response. Microstructure analysis using scanning electron microscopy was also performed.

Keywords

CeramicCompositeDielectric
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 12 , December 2007 , pp. 3292 - 3302
Copyright
Copyright © Materials Research Society 2007

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References

REFERENCES

1Calame, J.P.Abe, D.K.: Applications of advanced materials technologies to vacuum electronic devices. Proc. IEEE 87, 840 1999CrossRefGoogle Scholar
2Main, W., Tantawi, S.Hamilton, J.: Measurement of the dielectric constant of lossy ceramics. Int. J. Electron. 72, 499 1992CrossRefGoogle Scholar
3Petelin, M.I.: Mode selection in high power microwave sources. IEEE Trans. Electron Devices 48, 129 2001CrossRefGoogle Scholar
4Sakanaka, S., Hinode, F., Kubo, K.Urakawa, J.: Construction of 714 MHz HOM-free accelerating cavities. J. Synchrotron Rad. 5, 386 1998CrossRefGoogle ScholarPubMed
5Calame, J.P., Abe, D.K., Levush, B.Lobas, D.: Broadband complex dielectric permittivity of Porous aluminum silicate-pyrolytic carbon composites. J. Am. Ceram. Soc. 88, 2133 2005CrossRefGoogle Scholar
6Zhang, X-Y., Tan, S.H., Zhang, J-X.Jiang, D-L.: Lossy AlN-SiC composites fabricated by spark plasma sintering. J. Mater. Res. 19, 2759 2004CrossRefGoogle Scholar
7Calame, J.P.Lawson, W.: A modified method for producing carbon loaded vacuum compatible microwave absorbers from a porous ceramic. IEEE Trans. Electron Devices 38, 1538 1991CrossRefGoogle Scholar
8Mikijelj, B., Abe, D.K.Hutcheon, R.: AlN-based lossy ceramics for high average power microwave devices: Performance-property correlation. J. Eur. Ceram. Soc. 23, 2705 2003CrossRefGoogle Scholar
9Bentsen, L.D., Hasselman, D.P.H.Ruh, R.: Effect of hot-pressing temperature on the thermal diffusivity/conductivity of SiC/AlN composites. J. Am. Ceram. Soc. 66, C-40 1983CrossRefGoogle Scholar
10Vos, B., Mosman, J., Zhang, Y., Poels, E.Bliek, A.: Impregnated carbon as a susceptor material for low loss oxides in dielectric heating. J. Mater. Sci. 38, 173 2003CrossRefGoogle Scholar
11Ha, J-S., Lim, C-S., Kim, C-S.Cheong, D-S.: A new process for Al2O3/SiC nanocomposites by polycarbosilane infiltration. Mater. Chem. Phys. 75, 241 2002CrossRefGoogle Scholar
12Interrante, L.V., Moraes, K., Liu, Q., Lu, N., Puerta, A.Sneddon, L.G.: Silicon-based ceramics from polymer precursors. Pure Appl. Chem. 74, 2111 2002CrossRefGoogle Scholar
13Belhadj-Tahar, N-E.Fourrier-Lamer, A.: Broad-band analysis of coaxial discontinuity used for dielectric measurements. IEEE Trans. Microwave Theory Tech. 34, 346 1986CrossRefGoogle Scholar
14Bergman, D.J.Imry, Y.: Critical behavior of the complex dielectric constant near the percolation threshold of a heterogeneous material. Phys. Rev. Lett. 39, 1222 1977CrossRefGoogle Scholar
15Grannan, D.M., Garland, J.C.Tanner, D.B.: Critical behavior of the dielectric constant of a random composite near the percolation threshold. Phys. Rev. Lett. 46, 375 1981CrossRefGoogle Scholar
16Jonscher, A.K.: The ‘universal’ dielectric response. Nature 267, 673 1977CrossRefGoogle Scholar
17Dyre, J.C.Schrøder, T.B.: Universality of ac conduction in disordered solids. Rev. Mod. Phys. 72, 873 2000CrossRefGoogle Scholar
18Long, A.R.Balkan, N.: AC loss in amorphous germanium. J. Non-Cryst. Solids 35&36, 415 1980CrossRefGoogle Scholar
19Lunkenheimer, P.Loidl, A.: Response of disordered matter to electromagnetic fields. Phys. Rev. Lett. 91, 207601-1-4 2003CrossRefGoogle ScholarPubMed
20Lunkenheimer, P., Mayr, F.Loidl, A.: Dynamic conductivity of semiconducting manganites approaching the metal-insulator transition. Ann. Phys. (Leipzig) 15, 498 2006CrossRefGoogle Scholar
21Kramers, H.A.: Diffusion of light by atoms. Atti. Congr. Int. Fisici 2, 545 1927Google Scholar
22Gorter, C.J., Kronig, R.deL.: On the theory of absorption and dispersion in paramagnetic and dielectric media. Physica 3, 1009 1936CrossRefGoogle Scholar
23Song, Y., Noh, T.W., Lee, S-I.Gaines, J.R.: Experimental study of the three-dimensional ac conductivity and dielectric constant of a conductor-insulator composite near the percolation threshold. Phys. Rev. B 33, 904 1986CrossRefGoogle ScholarPubMed
24Wagner, K.W.: The theory of incomplete dielectricity. Ann. D. Phys. 40, 817 1913CrossRefGoogle Scholar
25Boehmer, R., Lunkenheimer, P., Lotze, M.Loidl, A.: The lithium ion conductor β-spodumene: an orientational glass. Z. Phys. B 100, 583 1996CrossRefGoogle Scholar
26Knauth, P.Tuller, H.L.: Solid-state ionics: roots, status, and future prospects. J. Am. Ceram. Soc. 85, 1654 2002CrossRefGoogle Scholar