Hostname: page-component-76d6cb85b7-2r2wp Total loading time: 0 Render date: 2026-07-22T18:21:30.648Z Has data issue: false hasContentIssue false
  • English
  • Français

Sol-Gel Routes towards Magnetic Nanocomposites with Tailored Microwave Absorption

Published online by Cambridge University Press:  10 February 2011

Ph. Colomban  and
V. Vendange
Ph. Colomban
Affiliation:
ONERA, OM, BP72, 92322 Chatillon, France CNRS, LASIR, 2 rue Henri Dunant, 94320 Thiais, France
V. Vendange
Affiliation:
ONERA, OM, BP72, 92322 Chatillon, France
Get access

Abstract

Ceramic microwave absorbents are of considerable interest for the structural applications with the tailored radar cross-section. The main parameters governing the electromagnetic cross-section are discussed in this paper with the specific interest of the dispersion of Co, Fe (and their alloys) particles in a dielectric aluminosilicate matrix (high Curie temperature, significant absorption in the 0.1–15GHz range) and the advantages of the sol-gel routes for the materials preparation. Three methods have been examined: (i) the first one is the mixing of the (sub)micronic metal powder within a liquid matrix precursor; (ii) the second is the mixing of the alkoxides with an aqueous solution of metal ions; and (iii) the third is the preparation of a porous host matrix impregnated by a concentrated solution of transition metal nitrates. Nanocomposites with diameter 20–200nm were achieved by heating at temperatures between 600 and 1100°C under a H2 atmosphere. The samples were characterized by SEM, TEM, magnetic hysteresis, Mössbauer and Raman spectroscopies and microwave absorption.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 457: Symposium V – Nanophase and Nanocomposite Materials II , 1996 , 451
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

1. Deleuze, C., Mathiot, A., Zamora, P. and Zerah, G., Chocs 6, 14–29 (1992).Google Scholar
2. Boust, F., in Proc. JCMM96, Quatrièmes Journées de Caractérisation Micro-Onde des Matériaux, April 3–5 1996, Chamberry (Fr), TP ONERA 1996–34, Chatillon, France.Google Scholar
3. Mouchon, E. and Colomban, Ph., J. Mater. Sci. 31, 323–334 (1996).Google Scholar
4. Colomban, Ph., in Proc. Third International Conference on Intelligent Materials-Third European Conference on Smart Structures and Materials. 3rd ICIM-ECSSM Lyon 96, June 3–5 1996, edited by Gobin, P.F. and Tatibouët, J., (SPIE-The International Society for Optical Engineering, Washington, 1996), 2779 pp. 813–818.Google Scholar
5. Knott, E.F., Staeffer, J.F. and Tuley, M.T., Radar Cross Section. Arteen House (1985);Google Scholar
Hartemann, P. and Labeyrie, M., Revue Technique Thomson-CSF 19(3–4), 413–430 (1987)Google Scholar
6. Klein, L.C. (Ed.), Sol-Gel Technology. Noyes Publications, Park Ridge (NJ) 1988 Google Scholar
7. Colomban, Ph., Ceram. Int. 15, 23–50 (1989).Google Scholar
8. Roy, R., Komarneni, S. and Roy, D.M., Mater. Res. Soc. Symp. Proc. 32, 347–359 (1984).Google Scholar
9. Roy, R.A. and Roy, R., Mater. Res. Bull. 19, 169–177 (1984).Google Scholar
10. Petrullat, J., Ray, S., Schubert, U., Guldner, G., Egger, Ch. and Breitscheidel, B., J. Non-Cryst. Solids 147 & 148, 594–600 (1992).Google Scholar
11. Breval, E., Deng, Z., Chiou, S. and Pantano, C.G., J. Mater. Sci. 27, 1464–1471 (1992).Google Scholar
12. Chatterjee, A. and Chakrarorty, D., J. Phys. D 23, 1097–1104 (1990).Google Scholar
13. Schuil, R.D., Ritter, J.J., Shapiro, A.J., Swartzendruber, L.J. and Bennett, L.H., J. Appl. Phys. 67, 4490–4497 (1990).Google Scholar
14. Vendange, V. and Colomban, Ph., in Proc. EMRS Meeting, Nanophase Materials Symposium. November 3–6 1992, Strasbourg, Mater. Sci. Eng. A168, 199–203 (1993).Google Scholar
15. Vendange, V., Flavin, E. and Colomban, Ph., J. Mater. Sci. Lett. 15, 137–141 (1996).Google Scholar
16. Colomban, Ph. and Vendange, V., J. Non-Cryst. Solids 147&148, 245–250 (1992).Google Scholar
17. Vendange, V. and Colomban, Ph., J. Sol-Gel Sci. Techn. 2, 407–411 (1994).Google Scholar
18. Vendange, V. and Colomban, Ph., J. Mater. Res. 11, 518–528 (1996).Google Scholar
19. Vendange, V., Colomban, Ph. and Larché, F., Microporous Mat. 5, 389–400 (1996).Google Scholar
20. Vendange, V. and Colomban, Ph., J. Porous Materials 3 (1996) in press.Google Scholar
21. Vendange, V., Jones, D.J. and Colomban, Ph., J. Phys. Chem. Solids (1996) in press.Google Scholar
22. Thibeau, R.J. Brow, C.W. and Heidersbach, H., Appl. Speet. 32, 532–540 (1978).Google Scholar
23. Forbes, P., Dubessy, J. and Kosztolangi, C., Geo-Raman-86, Terra Cognita 7, 16 (1977).Google Scholar