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ULTRASONIC TRANSDUCER AND METHOD FOR MANUFACTURING SAME
A case (120), a piezoelectric vibrator (110), and a wire (130, 140) are provided. The case (120) has a bottomed cylindrical shape, the case having a bottom portion and a side wall portion. The piezoelectric vibrator (110) has piezoelectric ceramic containing Ti and Zr, and is attached to the bottom portion inside the case (120). The wire (130, 140) is connected to the piezoelectric vibrator (110) and disposed to extend to an outside of the case (120). A resonance frequency in a spreading vibration mode of the piezoelectric ceramic not attached to the bottom portion becomes minimum at a temperature in a range of -30°C or higher and 10°C or lower. A cross-sectional porosity in any longitudinal cross section of the piezoelectric ceramic is 1% or less.
ULTRASONIC TRANSDUCER AND METHOD FOR MANUFACTURING SAME
A case (120), a piezoelectric vibrator (110), and a wire (130, 140) are provided. The case (120) has a bottomed cylindrical shape, the case having a bottom portion and a side wall portion. The piezoelectric vibrator (110) has piezoelectric ceramic containing Ti and Zr, and is attached to the bottom portion inside the case (120). The wire (130, 140) is connected to the piezoelectric vibrator (110) and disposed to extend to an outside of the case (120). A resonance frequency in a spreading vibration mode of the piezoelectric ceramic not attached to the bottom portion becomes minimum at a temperature in a range of -30°C or higher and 10°C or lower. A cross-sectional porosity in any longitudinal cross section of the piezoelectric ceramic is 1% or less.
ULTRASONIC TRANSDUCER AND METHOD FOR MANUFACTURING SAME
ULTRASCHALLWANDLER UND VERFAHREN ZUR HERSTELLUNG DAVON
TRANSDUCTEUR ULTRASONORE ET PROCÉDÉ DE FABRICATION CORRESPONDANT
KORESAWA KENJI (Autor:in) / SUZUKI YUSUKE (Autor:in) / NOMURA JUNICHI (Autor:in) / MATSUSHITA TOMOAKI (Autor:in) / FUJITA AKIO (Autor:in) / FUJII KAZUHIKO (Autor:in)
09.10.2024
Patent
Elektronische Ressource
Englisch
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