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Phase Transition and High Piezoactivity of Sb Doped (Na0.53K0.435Li0.035)Nb0.94Ta0.06O3 Lead-Free Ceramics |
| QI Peng1;WANG Jin-Feng1;MING Bao-Quan1;WANG Chun-Ming1;LIANG Xing-Hua2 |
| 1School of Physics, Shandong University, Ji'nan 2501002Foxconn Technology Group, Yantai 264006 |
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| Cite this article: |
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QI Peng, WANG Jin-Feng, MING Bao-Quan et al 2007 Chin. Phys. Lett. 24 3535-3538 |
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Abstract Lead-free piezoelectric ceramics with the composition of (Na0.53K0.435Li0.035)Nb0.94-xSbxTa0.06O3 (NKLNST) are synthesized by a conventional solid-state sintering process. An MPB-like region between orthorhombic and pseudocubic phases is found in this system. The density, piezoelectric and dielectric properties are enhanced greatly in this region. A composition (Na0.53K0.435Li0.035) (Nb0.86Sb0.08Ta0.06)O3 is found to have excellent
electrical properties: d33=320pC/N, kp=49% and kt=43%, as well as relatively low loss, tan δ=4.2%, and high relative density higher than 96%, which indicate that this ceramics is a promising lead-free piezoceramics replacing for lead zirconate titanate.
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| Keywords:
77.84.-s
77.84.Dy
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Received: 10 October 2007
Published: 03 December 2007
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| PACS: |
77.84.-s
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(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
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77.84.Dy
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