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Design and Fabrication of High Temperature Heat Flux and Temperature Sensor Using Piezoelectric Ca3TaGa3Si2O14 Single Crystal Material

Hsiao, Pei-Yuan (2023) Design and Fabrication of High Temperature Heat Flux and Temperature Sensor Using Piezoelectric Ca3TaGa3Si2O14 Single Crystal Material. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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High temperature sensors are desired for the automotive, aerospace and energy industries. Specifically, high temperature sensors are critical for high performance engine development as well as engine control and health assessment, in which the sensors must be able to operate reliably under harsh environments. Piezoelectric sensors for high temperature applications have attracted attention due to their simplistic structure, fast response time and ease of integration. In this dissertation, Ca3TaGa3Si2O14 (CTGS) crystals with the ordered langasite structure were investigated for potential high temperature sensing applications.
Thermal properties of X-, Y- and Z – cut CTGS crystal were measured. From the thermal property results along with CTGS piezoelectric properties, CTGS Y-cut substrate was chosen for design and fabrication of high temperature heat flux and temperature sensor.
In this research, CTGS surface acoustic wave (SAW) sensors with Pt/Ti as the IDT metallization were designed and fabricated for high temperature sensing applications. For wired sensor, two IDT SAW resonators were fabricated on the CTGS substrate. For wireless sensor, single-port resonator with antenna was frabricate onto CTGS substrate. The SAW sensors were tested successfully from room temperature to 800 °C in wired mode and 600 °C in wireless mode. Both wired and wireless sensors showed effective temperature sensing response in desired temperature range.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Hsiao, Pei-Yuanpeh41@pitt.edupeh410000-0002-1285-165X
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairWang,
Committee CoChairBan,
Committee MemberChyu,
Committee MemberYun,
Date: 19 January 2023
Date Type: Publication
Defense Date: 11 April 2022
Approval Date: 19 January 2023
Submission Date: 27 October 2022
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 90
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: CTGS single crystal, Surface acoustic wave, high temperature sensor
Date Deposited: 19 Jan 2023 19:24
Last Modified: 19 Jan 2023 19:24

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