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Related Experiment Videos

A capacitance ultrasonic transducer for high-temperature applications.

Andreas Schröder1, Stefan Harasek, Mario Kupnik

  • 1Institute of General Physics, Vienna University of Technology, A-1040 Wien, Austria.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|August 11, 2004
PubMed
Summary

This study presents a new ultrasonic capacitance transducer designed for high-temperature gas environments up to 500°C. The novel transducer demonstrates reliable functionality in extreme conditions, paving the way for advanced sensor applications.

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Area of Science:

  • Sensor Technology
  • Materials Science
  • Acoustics

Background:

  • Conventional transducers face limitations at elevated temperatures.
  • Need for reliable sensors in high-temperature gas applications.

Purpose of the Study:

  • Introduce a novel ultrasonic capacitance transducer for high-temperature operation.
  • Provide guidelines for material selection and fabrication.
  • Characterize and validate transducer performance at extreme temperatures.

Main Methods:

  • Design based on a metallic membrane foil and insulated backplate.
  • Utilized titanium/silicon nitride and silicon/silicon oxide materials.
  • Detailed description of manufacturing techniques and experimental setup.

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Main Results:

  • Successfully fabricated and tested ultrasonic capacitance transducers.
  • Demonstrated functionality at air temperatures up to 500 degrees Celsius.
  • Characterization and performance data presented and discussed.

Conclusions:

  • The novel transducer design is suitable for operation at several hundred degrees Celsius.
  • Material selection and manufacturing guidelines are provided.
  • Transducer functionality is proven in high-temperature gas environments.