Carbon nanotube (CNT)-dispersed Si 3 N 4 ceramics with electrical conductivity were developed based on the lower temperature densification technique, in which the key point is the addition of both TiO 2 and AlN as well as Y 2 O 3 and Al 2 O 3 as sintering aids. This new ceramic with a small amount of CNTs exhibits very high electrical conductivity in addition to high strength and toughness. Since Si 3 N 4 ceramics with Y 2 O 3 -Al 2 O 3 -TiO 2 -AlN were originally used as a wear material, electrically conductive Si 3 N 4 ceramics are expected to be applied for high-performance static-electricity-free bearings for aerospace and other high-performance components. 2889J ournal

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