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(Unpublished)
This is the latest version of this item.
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Unpublished |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: |
|
| ETD Committee: |
|
| 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 |
Available Versions of this Item
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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)
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