Effect of Bi2O3 addition on the microstructure and electrical properties of lead-free (Na0.5K0.5)NbO3- Bi(Na0.80K0.20)TiO3 ceramics
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Although PbZrO3-PbTiO3 (PZT)-based ceramics are playing a dominant role in piezoelectric materials, their evaporation of harmful lead oxide during the sintering process causes a crucial environment problem. It is necessary to search for lead-free piezoelectric materials that have such excellent properties as those found in the PZT-based ceramics. Therefore (Na0.5K0.5)NbO3-based solid solutions were studied to improve piezoelectric properties. In the present study, various quantities of Bi2O3 were added into 0.98(Na0.5K0.5)NbO3-0.02Bi(Na0.80K0.20)TiO3 (0.98NKN-0.02BNKT) ceramics. It was found that 0.98NKN-0.02BNKT with the addition of 0 ~ 0.5 wt.% Bi2O3 exhibit relatively good piezoelectric properties. For 0.98NKN0.02BNKT ceramics, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.35 and 0.41, respectively, at the sintering of 1100 o C for 3 hrs. For 0.98NKN-0.02BNKT ceramics with the addition of 0.3 wt.% Bi2O3, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.42 and 0.46, respectively, at the sintering of 1100 o C for 3 hrs. It is obvious that 0.98NKN-0.02BNKT solid solution ceramic by adding low quantities of Bi2O3 is one of the promising lead-free ceramics for electromechanical transducer applications.
Abstract
Although PbZrO3-PbTiO3 (PZT)-based ceramics are playing a dominant role in piezoelectric materials, their evaporation of harmful lead oxide during the sintering process causes a crucial environment problem. It is necessary to search for lead-free piezoelectric materials that have such excellent properties as those found in the PZT-based ceramics. Therefore (Na0.5K0.5)NbO3-based solid solutions were studied to improve piezoelectric properties. In the present study, various quantities of Bi2O3 were added into 0.98(Na0.5K0.5)NbO3-0.02Bi(Na0.80K0.20)TiO3 (0.98NKN-0.02BNKT) ceramics. It was found that 0.98NKN-0.02BNKT with the addition of 0 ~ 0.5 wt.% Bi2O3 exhibit relatively good piezoelectric properties. For 0.98NKN0.02BNKT ceramics, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.35 and 0.41, respectively, at the sintering of 1100 o C for 3 hrs. For 0.98NKN-0.02BNKT ceramics with the addition of 0.3 wt.% Bi2O3, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.42 and 0.46, respectively, at the sintering of 1100 o C for 3 hrs. It is obvious that 0.98NKN-0.02BNKT solid solution ceramic by adding low quantities of Bi2O3 is one of the promising lead-free ceramics for electromechanical transducer applications.
참고문헌 (18)
- G. Shirane, , Phys. Rev, 96, pp.581~588 (1954)
- H. Birol, , J. Eur. Ceram. Soc, 26, pp.861~866 (2006)
- S.H. Park, , Jpn. J. Appl. Phys, 43, pp.L1072~L1074 (2004)
- Y. Guo, , Jpn. J. Appl. Phys, 43, pp.6662~6666 (2004)
- Y. Guo, , Appl. Phys. Lett, 85, pp.4121~4123 (2004)
- Y. Guo, , Mater. Lett, 59, pp.241~244 (2005)
- Y. Guo, , Solid State Comm, 129, pp.279~284 (2004)
- R.C. Chang, , J. Eur. Ceram. Soc, 27, pp.4453~4460 (2007)
- C.H. Wang, , Jpn. J. Appl. Phys, 48, pp.041~403 (2009)
- C.H. Wang, , J. Ceram. Soc. Jpn, 117(5), pp.680~684 (2009)
- C. H. Wang, , J. Ceram. Soc. Jpn, 116, pp.632~636 (2008)
- Z. Chen, , J. Ceram. Soc. Jpn, 116, pp.661~663 (2008)
- C.H. Wang, , J. Ceram. Soc. Jpn, 239-242, pp.3240~3243 (2011)
- C. H. Wang, , J. Ceram. Soc. Jpn, 117(5), pp.693~697 (2009)
- Anon, , Proc. IRE, 49, pp.1161~1168 (1961)
- T. Senda, , J. Am. Ceram. Soc, 73(1), pp.106~ (1990)
- K. Okazaki, , J. Am. Ceram. Soc, 56(2), pp.82~86 (1973)
- K. H. Hartal, , Ferroelectrics, 12, pp.9~19 (1976)