Characterization of Pure Face-Shear Strain in Piezoelectric α-Tellurium Dioxide (α-TeO<sub>2</sub>)
Paratellurite, also known as α-tellurium dioxide, is a ceramic that is primarily employed for its interesting optical properties. However, this material’s crystal structure belongs to the 422 symmetry class that allows a unique piezoelectric behavior to manifest itself: deformation in pure face-shea...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/10/939 |
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| author | Guillaume Boivin Pierre Bélanger Ricardo J. Zednik |
| author_facet | Guillaume Boivin Pierre Bélanger Ricardo J. Zednik |
| author_sort | Guillaume Boivin |
| collection | DOAJ |
| description | Paratellurite, also known as α-tellurium dioxide, is a ceramic that is primarily employed for its interesting optical properties. However, this material’s crystal structure belongs to the 422 symmetry class that allows a unique piezoelectric behavior to manifest itself: deformation in pure face-shear. This means that crystal symmetry necessitates the piezoelectric tensor to have only a single non-zero coefficient, d<sub>123</sub> = d<sub>14</sub>: such unique behavior has the potential to enable novel gyroscopic sensors and high-precision torsional microelectromechanical systems (MEMS) actuators, as pure face-shear can be used to induce pure torsion. Although α-TeO<sub>2</sub> is one of the few known materials belonging to this symmetry class, considerable uncertainty in its single piezoelectric coefficient exists, with the few reported literature values ranging from 6.13 to 14.58 pC/N; this large uncertainty results from the difficulty in using conventional piezoelectric characterization techniques on paratellurite, limiting measurements to indirect methods. The novel applications that would be enabled by the adoption of this extraordinary material are frustrated by this lack of confidence in the literature. We therefore leverage, for the first time, a first-principles analytical physical model with electrochemical impedance spectroscopy (EIS) to determine, directly, the lone piezoelectric coefficient d<sub>123</sub> = d<sub>14</sub> = 7.92 pC/N. |
| first_indexed | 2024-03-10T15:35:46Z |
| format | Article |
| id | doaj.art-ade27fcf28104caeaf145af5b73b6d16 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T15:35:46Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-ade27fcf28104caeaf145af5b73b6d162023-11-20T17:15:49ZengMDPI AGCrystals2073-43522020-10-01101093910.3390/cryst10100939Characterization of Pure Face-Shear Strain in Piezoelectric α-Tellurium Dioxide (α-TeO<sub>2</sub>)Guillaume Boivin0Pierre Bélanger1Ricardo J. Zednik2École de Technologie Supérieure, Université du Québec, Montréal, QC H3C1K3, CanadaÉcole de Technologie Supérieure, Université du Québec, Montréal, QC H3C1K3, CanadaÉcole de Technologie Supérieure, Université du Québec, Montréal, QC H3C1K3, CanadaParatellurite, also known as α-tellurium dioxide, is a ceramic that is primarily employed for its interesting optical properties. However, this material’s crystal structure belongs to the 422 symmetry class that allows a unique piezoelectric behavior to manifest itself: deformation in pure face-shear. This means that crystal symmetry necessitates the piezoelectric tensor to have only a single non-zero coefficient, d<sub>123</sub> = d<sub>14</sub>: such unique behavior has the potential to enable novel gyroscopic sensors and high-precision torsional microelectromechanical systems (MEMS) actuators, as pure face-shear can be used to induce pure torsion. Although α-TeO<sub>2</sub> is one of the few known materials belonging to this symmetry class, considerable uncertainty in its single piezoelectric coefficient exists, with the few reported literature values ranging from 6.13 to 14.58 pC/N; this large uncertainty results from the difficulty in using conventional piezoelectric characterization techniques on paratellurite, limiting measurements to indirect methods. The novel applications that would be enabled by the adoption of this extraordinary material are frustrated by this lack of confidence in the literature. We therefore leverage, for the first time, a first-principles analytical physical model with electrochemical impedance spectroscopy (EIS) to determine, directly, the lone piezoelectric coefficient d<sub>123</sub> = d<sub>14</sub> = 7.92 pC/N.https://www.mdpi.com/2073-4352/10/10/939paratelluritetellurium dioxidepiezoelectricityface-sheartorsionimpedance spectroscopy |
| spellingShingle | Guillaume Boivin Pierre Bélanger Ricardo J. Zednik Characterization of Pure Face-Shear Strain in Piezoelectric α-Tellurium Dioxide (α-TeO<sub>2</sub>) Crystals paratellurite tellurium dioxide piezoelectricity face-shear torsion impedance spectroscopy |
| title | Characterization of Pure Face-Shear Strain in Piezoelectric α-Tellurium Dioxide (α-TeO<sub>2</sub>) |
| title_full | Characterization of Pure Face-Shear Strain in Piezoelectric α-Tellurium Dioxide (α-TeO<sub>2</sub>) |
| title_fullStr | Characterization of Pure Face-Shear Strain in Piezoelectric α-Tellurium Dioxide (α-TeO<sub>2</sub>) |
| title_full_unstemmed | Characterization of Pure Face-Shear Strain in Piezoelectric α-Tellurium Dioxide (α-TeO<sub>2</sub>) |
| title_short | Characterization of Pure Face-Shear Strain in Piezoelectric α-Tellurium Dioxide (α-TeO<sub>2</sub>) |
| title_sort | characterization of pure face shear strain in piezoelectric α tellurium dioxide α teo sub 2 sub |
| topic | paratellurite tellurium dioxide piezoelectricity face-shear torsion impedance spectroscopy |
| url | https://www.mdpi.com/2073-4352/10/10/939 |
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