In situ formation of hexaferrite magnets within a 3Y-TZP matrix: La<inf>2</inf>O<inf>3</inf>-ZnO-Fe<inf>2</inf>O<inf>3</inf> and BaO-Fe<inf>2</inf>O<inf>3</inf> systems

Yoshikazu Suzuki, Héctor A. Calderón, Naoki Kondo, Tatsuki Ohji

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The in situ formation of magnetoplumbite-type (M-type) hexaferrites within a 3Y-TZP matrix was examined for the La2O3-ZnO-Fe2O3 and BaO-Fe2O3 systems. The formation of barium hexaferrite (Ba-M) was rapid enough at a temperature of 1300 °C for 2 h to result in a uniform dispersion of fine Ba-M particles in a tetragonal zirconia polycrystal (TZP) matrix. However, the formation of lanthanum-substituted hexaferrite (La-M) was rather sluggish, despite the existence of a charge-compensating divalent oxide. The 3Y-TZP/20-wt%-BaFe12O19 in situ composite possessed good magnetic properties, as well as moderately good mechanical properties.
Original languageAmerican English
Pages (from-to)1346-1350
Number of pages1210
JournalJournal of the American Ceramic Society
StatePublished - 1 Jan 2000
Externally publishedYes


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