Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-783-C7-788
Preparation of hexaferrite multilayers by tape castingD. ROUSSELLE and D. AUTISSIER
CEA/DAM, Centre d'Etudes de Bruyères-le-Châtel, BP. 12, 91680 Bruyères-le-Châtel, France
Tape casting technics were used to realize a screen with continuous change in characteristics. Different hexaferrite compositions owned by the Ba3Co2-xZnxFe24O41 (Z) family were synthetized by coprecipitation method and calcined at 1200 °C in air. Then a slurry containing this powder is slip casted using tape casting. The tapes are dried under magnetic fied in order to orient the magnetic platelet-shaped particles. Multi-sheets realized with different tapes by hot pressing (65 °C, 4 MPa) are sintered at 1270 °C in air. The coefficient of reflexion measured on single composition multi-sheets (Co2Z, Co1.5Zn0.5Z or CoZnZ) is compared to the computed value of a multi-composition multi-sheet which is Co2Z/Co1.5Zn0.5Z/CoZnZ.
© EDP Sciences 1993