A Wide-Band Polymer Ultrasonic Transducer Using Acoustic Impedance Matching Technique : Mechanical and Acoustical Properties
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概要
- 論文の詳細を見る
A wide-band polymer ultrasonic transducer having acoustic impedance matching layers is proposed. In this transducer, a polystyrene or polypropylene matching layer is bonded onto the front surface of a piezoelectric film of vinylidenefluoride and trifluoroethylene copolymer (P(VDF-TrFE)). The matching layer, λλ/4 thick, is most effective for obtaining a wider-band frequency response and sharper impulse response operating in water. Analytical and experimental results proved that the matching layer brings about a depth resolution 1.7 times higher than that of a conventional P(VDF-TrFE) transducer without any reduction in sensitivity. A medical ultrasonic image taken with the new transducer shows its usefulness for practical applications.
- 社団法人応用物理学会の論文
- 1988-04-20
著者
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OHIGASHI Hiroji
Department of Meterials Science and Engineering, Faculty of Engineering, Yamagata University
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KIMURA Kuniko
Engineering Research Laboratory Toray Industries Inc.
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Kimura Kuniko
Engineering Research Laboratory Toray Industries Inc.:electronics And Imaging Materials Research Lab
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YONEYA Kazuyuki
Engineering Research Laboratory, Toray Industries Inc
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Ohigashi Hiroji
Department Of Materials Science And Engineering Faculty Of Engineering Yamagata University
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Yoneya Kazuyuki
Engineering Research Laboratory Toray Industries Inc:seidensha Denshi Kogyo Co. Ltd
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Ohigashi Hiroji
Department of Material Science and Engineering, Yamagata University, Yonezawa 992-8510, Japan
関連論文
- Ferroelectric Switching Behavior in Thin Fibs of Polyurea-5
- Transverse Sound Velocity of the Ferroelectric Copolymer Film of Vinylidene Fluoride and Trifluoroethylene
- Temperature Dependence of Switching Characteristics in Polyurea-5 Thin Films
- Ferroelectric Behavior in Thin Films of Polyurea-5
- Chain Motions in the Paraelectric Phase in Single Crystalline Films of Vinylidene Fluoride and Trifluoroethylene Copolymer P (VDF/TrFE)
- Analysis of Frequency Response Characteristics of Polymer Ultrasonic Transducers
- Role of Transient Metastable Hexagonal Phase in the Formation of Extended Chain Single Crystals of Vinylidene Fluoride and Trifluoroethylene Copolymers
- Lateral Growth of Extemded-Chain Single Crystals of Vinylidene Fluorideand Trifluoroethylene Copolymers
- Morphology of Extended Chain Single Crystals of Vinylidene Fluoride and Trifluoroethylene Copolymers
- Thin Films of (BEDT-TTF)_2Cu(NCS)_2 Prepared by an Electrodeposition Method
- 1H–13C Nuclear Cross-Relaxation and Molecular Motion in Single Crystalline Film of Vinylidene Fluoride and Trifluoroethylene Copolymer with 75 mol% Vinylidene Fluoride
- Temperature Dependence of Shear Piezoelectric Properties of Poly (vinylidene fluoride) Studied by Piezoelectric Resonance Method
- Performance of Multilayered Ultrasonic Transducers Comprising Vinylidene Fluoride and Trifluoroethylene Copolymer Films and Ferroelectric Ceramic Plates
- Polarization Behavior in Vinylidene Fluoride-Trifluoroethylene Copolymer Thin Films
- Analysis of Impulse Response Characterisstics of Polymer Ultrasonic Transducers : Mechanical and Acoustical Properties
- A Wide-Band Polymer Ultrasonic Transducer Using Acoustic Impedance Matching Technique : Mechanical and Acoustical Properties
- Piezoelectric Properties of P(VDF-TrFE) Thin Films at Low Temperatures and Their Application to Ultrasonic Transducers for Scanning Acoustic Microscopy Operating in a Wide Temperature Range : Ultrasonic Transduction
- Piezoelectric Properties of β-Form PVDF Films Crystallized at High Pressure and Their Applications to Heat-Resistant Ultrasonic Transducers : Ultrasonic Transduction
- Growth of Single Crystals of Poly(vinylidene fluoride) under High Pressures
- Lamellar and Bulk Single Crystals Grown in Annealed Films of Vinylidene Fluoride and Trifluoroethylene Copolymers : Chemistry (incl. physical process)
- Pyroelectric Coefficient and Heat Capacity of a Ferroelectric Copolymer of Vinylidene Fluoride and Trifluoroethylene at Low Temperature
- Thickness Dependence of Orientation Factors of Crystal Axes in Poly(vinylidene fluoride/ trifluoroethylene) Single Crystalline Films
- Temperature Dependence of Switching Characteristics in Polyurea-5 Thin Films
- Absorption spectra of the cationic radical salt of 3,3',5,5'-tetramethylbenzidine in acetonitrile.
- Dielectric Properties of Poly(methylphenylsilylene) under Humidity in the Kilohertz Range.