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Wireless Passive Ceramic Sensor for Far-Field Temperature Measurement at High Temperatures
Kevin M Tennant1, Brian R Jordan1, Noah L Strader2
1Department of Mechanical, Materials and Aerospace Engineering, West Virginia University, Morgantown, WV 26506, USA.
Sensors (Basel, Switzerland)
|March 13, 2024
Summary
A novel passive wireless sensor using electroceramic materials achieves stable temperature sensing up to 1000 °C. This high-temperature sensor is ideal for harsh environments and far-field applications.
Area of Science:
- Materials Science
- Electrical Engineering
- Sensor Technology
Background:
- High-temperature sensing is critical for harsh industrial environments.
- Existing sensors often lack the necessary resilience and wireless capabilities.
- Elect ceramic materials offer conductivity, high-temperature resilience, and chemical stability.
Purpose of the Study:
- To develop a passive wireless high-temperature sensor for far-field applications.
- To achieve stable temperature sensing up to 1000 °C.
- To leverage the properties of electroceramic materials for sensor fabrication.
Main Methods:
- Designed and modeled a patch antenna using ANSYS HFSS for 2.5-3.5 GHz operation.
- Fabricated sensors using silver (Ag) for 600 °C and Indium Tin Oxide (ITO) for 1000 °C on Al2O3 substrates via screen printing.
- Sintered sensors at 700 °C (Ag) and 1200 °C (ITO) and evaluated performance using ultra-wideband slot antennas up to 0.75 m.
Main Results:
- Achieved stable temperature sensing up to 1000 °C with ITO-based sensors.
- Observed sensor sensitivity ranging from 22 to 62 kHz/°C across the 50-1000 °C range.
- Noted a decrease in sensitivity at interrogating distances up to 0.75 m.
Conclusions:
- Developed a functional passive wireless high-temperature sensor suitable for demanding applications.
- Demonstrated the viability of electroceramic materials (Ag and ITO) for high-temperature sensing.
- Highlighted the trade-off between sensing distance and sensitivity in far-field applications.
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