| 摘要 |
A material used for the actuator walls in an ink ejecting device, that are the walls of ink flow paths, are those in which the rate of change of the electromechanical coupling coefficient, with changes in temperature, is not greater than 3000 PPm/ DEG C. at temperatures of 20 DEG C. or less. Consequently, at a driving voltage that produces an ink drop ejection velocity of 5 m/s at 25 DEG C., the ink drop ejection velocity when driven at 10 DEG C. is at least 3 m/s, so that it is possible to obtain good printing quality.
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