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고압전 재료 (압전 단결정 기반)

압전 단결정 개발

· Appearance of Piezoelectric PMN-PT and PZN-PT Single Crystals

    - Remarkable Increase in Piezoelectric Properties

1. Very High Electromechanical Coupling Coefficient
(k₃₃ and k₃₂ > 0.9)


·Transducer Application

Significant increase in transducer bandwidth, sensiticty, and
accoustic power
Higher power efficiency

2. Very High Piezoelectric Constant
(d₃₃ and d₃₂ > 2000 pC/N)


·Actuator Application

Higher Strain levels
Dramatic improvement in vibration damping

단결정과 다결정 비교

· Comparison between PMN-PT Single Crystals and PZT-5H Ceramics

d31 d33 d36 d15
PMN-PT
Crystals
-1,200~1,700
pC/N
(k31 > 0.85)
2,000~2,500
(k33 > 0.9)
2,000~2,500
(k36 > 0.9)
4,000~6,000
(k15 > 0.95)
PZT-5H
Ceramics
-250 pC/N
(k31 > 0.4)
600
(k33 > 0.75)
0 750
(k15 > 0.7)

응용분야

· Applications of Piezoelectric Single Crystals

1. "33-mode" Application (k33 > 0.9; -d33 > 2,000 pC/N)

· Meddical Ultrasound Transducers
· Positioning Actuators
· Vibration Control Actuators
· Broad Band SONAR
· High Power Ultrasonics (Motors, Drills, and Welders, etc.)


2. "31 or 32-mode" Application (k32 > 0.9; -d32 > 1,500 pC/N)

· Low Profile Actuators
· Vibration Control
· Energy Harvesting
· Strain Sensors
· Benders (Unimorph and Bimorph)


3. "15-mode" Application (k15 > 0.9; -d15 > 3,000 pC/N)

· High Sensitivity Accelerometers
· Torque Tubes
· Non-Destructive Testing (NDT)


미래전망

· Future Prospect of Piezoelectric Single Crystal (PSC) Technology

· Development of High-performance Devices by Using Next-Generation PSC and
  Lead-free High Performance Devices by Using Lead-free PSC


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