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Microwave Sintering of Baryum Hexaferrite

Published online by Cambridge University Press:  15 February 2011

D. Rousselle ,
D. Autissier ,
B. Guillou  and
J. Leclerc
D. Rousselle
Affiliation:
CEA/DAM, Centre d'Etudes de Bruyères-le-Châtel, BP 12, 91680 Bruyères-le-Châtel, France
D. Autissier
Affiliation:
CEA/DAM, Centre d'Etudes de Bruyères-le-Châtel, BP 12, 91680 Bruyères-le-Châtel, France
B. Guillou
Affiliation:
HYPERFIELD ENGINEERING SA, 22 Avenue des Fauvettes, 33700 Mérignac, France.
J. Leclerc
Affiliation:
CEA/CESTA, BP2, 33114 Le Barp, France
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Abstract

Conventional sintering of baryum hexaferrite Co2Z leads to a mixture of phases with a low density. In this paper we try to obtain a pure densified CO2Z hexaferrite by microwave heating. The design of the applicator is computed from both the electromagnetic physical characteristics, the dimensions and the shape of the hexaferrite sample. The travelling microwave mode is preferred to the resonant one. Microwave process consists in a debinding step followed by the high temperature sintering cycle. Sintering temperature evaluated by infrared sensors seems to be over-valued. A skin effect is observed which can be attributed to electronic conductivity due to high temperature formation of Fe2+ ions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 347: Symposium O – Microwave Processing of Materials IV , 1994 , 597
Copyright
Copyright © Materials Research Society 1994

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References

REFERENCES

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