| Autor: |
Davulis, Peter, Pereira da Cunha, Mauricio |
| Zdroj: |
2013 Joint European Frequency & Time Forum & International Frequency Control Symposium (EFTF/IFC); 2013, p996-999, 4p |
| Abstrakt: |
LGT BAW orientations are investigated up to 900°C for temperature-compensated orientations targeting harsh-environment applications. The study utilizes recently published LGT elastic, piezoelectric, and dielectric constants extracted by the authors using resonant ultrasound spectroscopy (RUS) up to 900°C based on the resonances of bulk crystal samples. Temperature-compensated LGT BAW orientations have been identified for operation at high temperatures. The orientations disclosed in this work have turnover temperatures between 100°C and 550°C for the one quasi-shear mode and up to 150°C for the other quasi-shear mode. Additionally, orientations were identified with pure transverse-shear modes that are selectively excitable and have temperature compensation up to 550°C. These orientations can be readily applied for both frequency control and sensor applications in harsh environments. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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