Suction nozzle
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United States of America Patent
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Oct 16, 2018
Grant Date -
Jan 25, 2018
app pub date -
Jan 27, 2016
filing date -
Jan 28, 2015
priority date (Note) -
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Abstract
A 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.
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