Abstract
This paper summarizes the temperature behavior of various Relaxor-PT piezoelectric single crystals. Owing to the strongly curved morphotropic phase boundary (MPB), the usage temperature is limited by TR-T, the rhombohedral to tetragonal phase transformation occuring at significantly lower temperatures than Tc. Attempts to modify the temperature usage range of PMN-PT and PZN-PT rhombohedral crystals using minor dopant modifications were limited, with little success. Of significant potential are crystals of PYN-PT, with a Tc > 330°C, even though TR-T was nearly half that value at ∼160°C. Lastly, single crystals in the novel Bi(Sc)O 3-PbTiO3 system offer significantly higher Tcs > 400°C, while exhibiting electromechanical coupling coefficients > 90%.
Original language | English (US) |
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Pages (from-to) | 774-777 |
Number of pages | 4 |
Journal | Proceedings of the IEEE Ultrasonics Symposium |
Volume | 1 |
State | Published - 2003 |
Event | 2003 IEEE Ultrasonics Symposium - Proceedings - Honolulu, HI, United States Duration: Oct 5 2003 → Oct 8 2003 |
All Science Journal Classification (ASJC) codes
- Acoustics and Ultrasonics