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Nonlinearity of piezoelectric resonator based on Ca3TaGa3Si2O14 and YCa4O(BO3)3 single crystals under DC bias field

Li, Xueqi (2018) Nonlinearity of piezoelectric resonator based on Ca3TaGa3Si2O14 and YCa4O(BO3)3 single crystals under DC bias field. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

Based on the superior stability of Ca3TaGa3Si2O14 (CTGS) and YCa4O(BO3)3 (YCOB) single crystals over a wide temperature range, this thesis work adopted Aleksandrov [1]’s method to investigate their nonlinear electromechanical properties which are crucial in the fabrication of acoustic wave devices with high-precision demand. In this research, two types of bulk acoustic wave resonators, longitudinal one and thickness shear one, have been considered separately to characterize the nonlinear permittivity, elastic coefficients as well as piezoelectric coefficients of CTGS and YCOB resonators under DC bias voltages from -180V to +180V. From the experimental results, it has been shown that resonance frequency has good linearity dependence on electric field. The nonlinear coefficients of resonators from eight crystal orientations are fully calculated, this potentially enables those two types of crystals to become frequency compensators. In addition, a pressure tube test setup was utilized to characterize the force/pressure dependence of resonant frequency of YCOB crystal in this research. With the pressure-frequency sensitivity and nonlinear coefficients in this research, the further investigation becomes possible to explore the design and applications of high precision bulk acoustic wave pressure sensors.


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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Li, Xueqixul38@pitt.eduxul38
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairWang, Qingmingqiw4@pitt.eduqiw4
Committee MemberSmolinski, Patrickpatsmol@pitt.edupatsmol
Committee MemberSlaughter, Williams S.wss@pitt.eduwss
Date: 11 June 2018
Date Type: Publication
Defense Date: 2 April 2018
Approval Date: 11 June 2018
Submission Date: 2 April 2018
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 71
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Nonlinear constants, CTGS, YCOB, pressure sensitivity, acoustic wave sensor
Date Deposited: 11 Jun 2018 19:35
Last Modified: 11 Jun 2018 19:35
URI: http://d-scholarship.pitt.edu/id/eprint/34023

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  • Nonlinearity of piezoelectric resonator based on Ca3TaGa3Si2O14 and YCa4O(BO3)3 single crystals under DC bias field. (deposited 11 Jun 2018 19:35) [Currently Displayed]

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