Thick coatings of barium hexaferrite with the compositions BaFe12O19 and BaCoTiFe10O19 were prepared using atmospheric plasma spraying (APS) technology. The coatings were prepared from pre-reacted powders of the desired composition. The as-deposited coatings were poorly crystallized, but their crystallinity was improved with a subsequent annealing. The crystallization mechanism of the sprayed hexaferrites was studied during annealing up to 1300 ◦C, using X-ray powder diffraction combined with thermal analysis and with electron microscopy including microanalysis. Single-phase coatings were obtained after annealing treatments at 1100–1300 ◦C. Their magnetic properties showed that they would be suitable for absorbers at microwave and mm-wave frequencies, depending on the coating phase’s composition, the crystallinity and the thicknesses.
Preparation of barium hexaferrite coatings using atmospheric plasma spraying / Lisjak, D., Bobzin, K., Richardt, K., Bégard, M., Bolelli, G., Lusvarghi, L., Hujanen, A., Lintunen, P., Pasquale, M., Olivetti, E.S., Drofenik, M., Schläfer, T.. - In: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. - ISSN 0955-2219. - 29:(2009), pp. 2333-2341. [10.1016/j.jeurceramsoc.2009.01.028]
Preparation of barium hexaferrite coatings using atmospheric plasma spraying
PASQUALE, MASSIMO;OLIVETTI, ELENA SONIA;
2009
Abstract
Thick coatings of barium hexaferrite with the compositions BaFe12O19 and BaCoTiFe10O19 were prepared using atmospheric plasma spraying (APS) technology. The coatings were prepared from pre-reacted powders of the desired composition. The as-deposited coatings were poorly crystallized, but their crystallinity was improved with a subsequent annealing. The crystallization mechanism of the sprayed hexaferrites was studied during annealing up to 1300 ◦C, using X-ray powder diffraction combined with thermal analysis and with electron microscopy including microanalysis. Single-phase coatings were obtained after annealing treatments at 1100–1300 ◦C. Their magnetic properties showed that they would be suitable for absorbers at microwave and mm-wave frequencies, depending on the coating phase’s composition, the crystallinity and the thicknesses.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
