| abstract |
(57) Abstract: To provide a tetragonal-stabilized zirconia / lanthanum hexaferrite-based composite sintered body having ferromagnetism. SOLUTION: This tetragonal-stabilized zirconia / lanthanum hexaferrite-based composite sintered body comprises (a) zirconium dioxide containing cesium oxide, yttrium oxide, magnesium oxide, or calcium oxide in an amount of 2 to 15 mol%. and 60 to 90 wt% tetragonal stabilized zirconia is dissolved, (b) formula La (Fe x, Al 1- x) 12 O 19 ( wherein, x Represents a number of 0.5 to 0.9), and a lanthanum-hexaferrite / lanthanum-β-alumina solid solution 40 to 1 0% by weight. |