화학공학소재연구정보센터
Korean Journal of Materials Research, Vol.25, No.6, 288-292, June, 2015
Enhanced Piezoelectric Properties of Lead-Free La and Nb Co-Modified Bi0.5(Na0.84K0.16)0.5TiO3-SrTiO3 Ceramics
E-mail:
New lead-free piezoelectric ceramics 0.96[{Bi0.5 (Na0.84 K0.16)0.5}1-xLax(Ti1-y Nby)O3]-0.04SrTiO3 (BNKT-ST-LN, where x = y = 0.00 ≤ (x = y) ≤ 0.015) were synthesized using the conventional solid-state reaction method. Their crystal structure, microstructure, and electrical properties were investigated as a function of the La and Nb (LN) content. The X-ray diffraction patterns revealed the formation of a single-phase perovskite structure for all the LN-modified BNKT-ST ceramics in this study. The temperature dependence of the dielectric curves showed that the maximum dielectric constant temperature (Tm) shifted towards lower temperatures and the curves became more diffuse with an increasing LN content. At the optimum composition (LN 0.005), a maximum value of remnant polarization (33 C/cm2) with a relatively low coercive field (22 kV/cm) and high piezoelectric constant (215 pC/N) was observed. These results indicate that the LN co-modified BNKT-ST ceramic system is a promising candidate for lead-free piezoelectric materials.
  1. Haertling GH, J. Am. Ceram. Soc., 82(4), 797 (1999)
  2. Rodel J, Webber KG, Dittmer R, Jo W, Kimura M, Damjanovic D, J. European Ceram. Soc., 35(6), 1659 (2015)
  3. Maqbool A, Hussain A, Rahman JU, Song TK, Kim WJ, Lee J, Kim MH, Ceram. Int., 40, 11905 (2014)
  4. Zaman A, Iqbal Y, Hussain A, Kim MH, Malik RA, J. Mater. Sci., 49(8), 3205 (2014)
  5. Zhang ST, Kounga AB, Aulbach E, Deng Y, J. Am. Ceram. Soc., 91(12), 3950 (2008)
  6. Hiruma Y, Imai Y, Watanabe Y, Takenaka T, Appl. Phys. Lett., 92, 262904 (2008)
  7. Sasaki A, Chiba T, Mamiya Y, Otsuki E, Jpn. J. Appl. Phys., 38, 5564 (1999)
  8. Zhang ST, Kounga AB, Aulbach E, Rodel J, Appl. Phys. Lett., 91, 112906 (2007)
  9. Han HS, Jo W, Rodel J, Hong IK, Tai WP, Lee JS, J. Phys. Condens. Matter, 24, 36590 (2012)
  10. Acosta M, Liu N, Deluca M, Heidt S, Ring I, Dietz C, Stark RW, Jo W, J. Appl. Phys., 117, 134106 (2015)
  11. Ullah A, Malik RA, Ullah A, Lee DS, Jeong SJ, Lee JS, Kim IW, Ahn CW, J. European Ceram. Soc., 34(1), 29 (2014)
  12. Hiruma Y, Imai Y, Watanabe Y, Nagata H, Takenaka T, Appl. Phys. Lett., 92, 262904 (2008)
  13. Malik RA, Kang JK, Hussain A, Ahn CW, Han HS, Lee JS, Appl. Phys. Exp., 7, 061502 (2014)
  14. Dinh TH, Lee HY, Yoon CH, Malik RA, Kong YM, Lee JS, Tran VDN, J. Korean Phys. Soc., 62, 1004 (2013)
  15. Nguyen VQ, Han HS, Kim KJ, Dang DD, Ahn KK, Lee JS, J. Alloy. Compd., 511, 237 (2012)
  16. Malik RA, Hussain A, Rahman JU, Maqbool A, Song TK, Kim WJ, Ryou SY, Kim MH, Mater. Lett., 143, 148 (2015)
  17. Wang K, Hussain A, Jo W, Rodel J, J. Am. Ceram. Soc., 95(7), 2241 (2012)
  18. Hao J, Shen B, Zhai J, Chen H, J. Appl. Phys., 115, 034101 (2014)
  19. Ullah A, Ahn CW, Malik RA, Lee JS, Kim IW, J. Electroceram., 33(3-4), 187 (2014)
  20. Lee HB, Heo DJ, Malik RA, Yoon CH, Han HS, Lee JS, Ceram. Int., 39, S705 (2013)
  21. Hussain A, Rahman JU, Zaman A, Malik RA, Kim JS, Song TK, Kim WJ, Kim MH, Mater. Chem. Phys., 143(3), 1282 (2014)
  22. Maqbool A, Hussain A, Malik RA, Rahman JU, Zaman A, Song TK, Kim WJ, Kim MH, Mater. Sci. Eng. B-Solid State Mater. Adv. Technol., doi.org/10.1016/j.mseb.2015. 05.009. (2015)
  23. Pham KN, Hussain A, Ahn CW, Kim IW, Jeong SJ, Lee JS, Mater. Lett., 64(20), 2219 (2010)