Determining the Independent Piezoelectric Coefficients Using Laser Interferometric Method
| Autor: | Xian Zhao, Fa-peng Yu, Fang-lin Li, Guang-da Wu, Shiwei Tian, Chao Jiang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science business.industry 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Piezoelectricity law.invention Crystal Interferometry Optics law Electric field 0103 physical sciences Ultrasonic sensor Deformation (engineering) 0210 nano-technology business Electrical impedance |
| Zdroj: | 2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA). |
| DOI: | 10.1109/spawda48812.2019.9019223 |
| Popis: | In this work, the laser interferometric method was used to evaluate the piezoelectric coefficients of crystals in trigonal symmetry, such as LiNbO3 (LN) and La3Ga5.5Ta0.5O14 (LGT) crystals. Taking advantage of the high sensitivity of Michelson interferometric, when the piezoelectric crystal deformed at the nanoscale under the applied electric field, the interferometric fringe will change correspondingly, thus amplifying the tiny deformation of the piezoelectric crystals. Compared to the traditional impedance method and ultrasonic method, the laser interferometric method could realize direct measurement and confirm the positive or negative sign of piezoelectric coefficients. The independent piezoelectric coefficients were evaluated to be d11=6.9 pC/N, d 14 =5.0 pC/N for trigonal LGT crystal, and d 21 =-22.8 pC/N, d 31 =0.87 pC/N, d 33 =10.2 pC/N, and d 16 =71.2 pC/N for trigonal LN crystal. The laser interferometric method can be applied for determining the independent piezoelectric coefficients for non-centrosymmetric crystal materials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|