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Electromechanical Properties of NKN-5LT Multilayer Actuator

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Abstract:

Li2O excess 0.95(Na0.5K0.5)NbO3-0.05LiTaO3 (NKN-5LT) ceramics were developed by conventional sintering method. Abnormal grain growth in NKN-5LT ceramics was observed with varying Li2O content during sintering. In the 1 mol% Li2O excess NKN-5LT samples sintered at 1000 oC for 4h in air, electromechanical coupling factor and piezoelectric constant of NKN-5LT ceramics were found to reach the highest values of 0.37 and 250 pC/N, respectively. Lead-free piezoelectric of the composition 1 mol% Li2O excess NKN-5LT were fabricated. 10×10×3 mm3 size multilayer ceramic actuators (MLCA) were fabricated by conventional tape casting method. The displacement of the MLCA was ~ 1 μm at 150 V. These results show that the NKN-5LT ceramics with reasonable good piezoelectric properties have the potential to become the next generation material for a wide range of electro-mechanical transducer applications.

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Periodical:

Advanced Materials Research (Volumes 26-28)

Pages:

263-266

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.26-28.263

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Online since:

October 2007

Authors:

Min Soo Kim, Soon Jong Jeong, Jae Sung Song

Keywords:

Lead-Free, Multilayer Ceramic Actuator, Piezoelectric

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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