Suction nozzle

Abstract

A suction nozzle is disclosed. The suction nozzle includes zirconia-based ceramics. The ceramics includes first grains and second grains. The first grains each contain zirconia, and the second grains each contain a black-colored component. The suction nozzle includes a suction face and a suction hole. The suction hole is in communication with the suction face. In the suction face, an area ratio of an area occupied by the second grains to a measurement face obtained by polishing the suction face is greater than or equal to 17% but less than or equal to 34%. A number of the second grains in an area of 90 μm2 in the measurement face is greater than or equal to 150 but less than or equal to 250.

Dependencies are inferred from the claim text.