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Journal of Materials Science

, Volume 43, Issue 17, pp 6016–6019 | Cite as

Effect of particle size distribution on microstructure and piezoelectric properties of MnO2-added 0.95(K0.5Na0.5)NbO3–0.5BaTiO3 ceramics

  • Cheol-Woo Ahn
  • Sahn Nahm
  • Myong-Jae Yoo
  • Hyeung-Gyu Lee
  • Shashank PriyaEmail author
Letter
At present, there are four prominent lead-free systems for actuator applications, which have been modified by various additives for enhancing the performance, namely, (Na 1/2Bi 1/2)TiO 3–(K 1/2Bi 1/2)TiO 3 (NBT–KBT), (Na 1/2Bi 1/2)TiO 3–BaTiO 3 (BT), (Na xK yLi 1−xy)NbO 3 (KNLN), and (Na 1/2K 1/2)NbO 3–BaTiO 3 (KNN–BT) [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]. Table  1 shows the representative properties of these four systems. Our research is focused on the KNN–BT system because of its potential to provide high piezoelectric and dielectric constants. In this letter, we address the synthesis issue for these compositions to obtain reliable and repeatable performance. This is a critical issue in order for research to converge and transition into products.
Table 1

Room temperature dielectric and piezoelectric properties of prominent lead free systems

System

d33 (pC/N)

ε33o

tan δ

kp

NBT–KBT–BT [1]

183

770

0.034

0.367

NBT–KBT–LBT [2]

216

1,550

0.034

0.401

KNN–LiSbO3 [3]

283

1,288

0.019

0.50

KNN–BT [6...

Keywords

MnO2 BaTiO3 Nb2O5 Piezoelectric Property Green Body 

Notes

Acknowledgements

The authors (C.-W. A. and S. P.) gratefully acknowledge the financial support from Office of Basic Energy Science, Department of Energy.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Cheol-Woo Ahn
    • 1
  • Sahn Nahm
    • 2
  • Myong-Jae Yoo
    • 2
    • 3
  • Hyeung-Gyu Lee
    • 3
  • Shashank Priya
    • 1
    Email author
  1. 1.Department of Materials Science and EngineeringVirginia Polytechnic Institute and State UniversityBlacksburgUSA
  2. 2.Department of Materials Science and EngineeringKorea UniversitySeoulSouth Korea
  3. 3.Korea Electronics Technology InstituteGyeonggi-doSouth Korea

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