KJ Ceramics 31

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Detailed Program

Paper Number : LP-I02

Time Frame : 16:30~16:55

Presentation Date : Thurseday, 27, November

Session Name : Leadfree Piezoelectrics

Session Chair 1# : Jae-Shin Lee

Session Chair 2# : Satoshi Wada

“Lead-free” Piezoelectric Single Crystals Fabricated by Solid-State Crystal Growth (SSCG) Method: Development and Application

Ho-Yong Lee

Ceracomp Co., Ltd

Crystallographically engineered Relaxor-PT single crystals, specifically PMN-PT and PZN-PT, offer much higher piezoelectric and electromechanical coupling coefficients (d33 > 1,500 pC/N, k33 > 0.9), when compared to PZT ceramics. Therefore, the high performance piezoelectric single crystals have been expected to replace polycrystalline PZT ceramics in many application fields such as ultrasound transducers (medical and NDA), SONAR transducer, piezoelectric actuators, piezoelectric sensors, ultrasonic motors and piezoelectric energy harvesting, etc.
Ceracomp Co., Ltd. (South Korea) has developed the solid-state single crystal growth (SSCG) technique for fabricating the high performance “lead(Pb)-based” piezoelectric single crystals such as PMN-PT and PMN-PZT. Since the SSCG process is quite simple and similar to conventional sintering process, compared to conventional single crystal growth methods such as flux and Bridgman methods, it is very cost-effective and suitable to mass production. And recently the SSCG method was successfully applied to growth of “lead(Pb)-free” piezoelectric single crystals of high electromechanical coupling coefficients (k33 > 0.85).
In this presentation the recent progress on development and application of “lead-free” piezoelectric single crystals using the “cost-effective” SSCG process will be reviewed.

Acknowledgements :

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