Piezoelectric bending transducer for use in piezoelectric valve, has supporting body exhibiting coefficient of elasticity greater than specified Pascal and specified thermal coefficient of expansion by utilization of carbon-fiber

摘要

The transducer has a bending transducer unit (4) comprising a supporting body (15) that is engaged with a piezoelectric body (17). The supporting body is formed as a synthetic resin body reinforced with a unidirectional carbon-fiber. The supporting body has a coefficient of elasticity greater than 180 giga-Pascal, and a thermal coefficient of expansion smaller than 2 x 10-6 per Kelvin by the utilization of the carbon-fiber.