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PHENOMENALLY HIGH TRANSDUCTION AIR∕GAS TRANSDUCERS FOR PRACTICAL NON-CONTACT ULTRASONIC APPLICATIONS
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2009
Year
Biomedical AcousticsEngineeringMechanical EngineeringEnvironment ProtectionStructural MaterialsPower UltrasoundPiezoelectric MaterialInstrumentationMaterials ScienceUltrasonicsAcoustic PropagationPiezoelectric MaterialsQuality ControlPiezoelectricityUltrasoundMaterials CharacterizationApplied PhysicsTransducer PrincipleCeramics MaterialsAcoustic MicroscopyMicromachined Ultrasonic Transducer
Based on novel acoustic impedance matching layers and high coupling piezoelectric materials this paper describes exceptionally high air/gas transduction ultrasonic transducers. By providing applications oriented performance of these transducers we also usher in the era of much desired Non‐Contact Ultrasound (NCU) testing and analysis of a wide range of materials including early stage formation of materials such as uncured composite prepregs, green ceramics and powder metals, plastics, elastomers, porous, hygroscopic, chemically bonded and other materials. Besides quality control, ultimately NCU offers timely opportunities for cost‐effective materials production, energy savings, and environment protection.