Lead-free ternary perovskite compounds with large electromechanical strains
Lead-free compounds based on perovskite solid solutions in the ternary system (Bi1/2Na1/2)TiO3-(Bi1/2K 1/2)TiO3-Bi(X1/2Ti1/2)O 3, where X Ni and Mg have been shown to exhibit large electromechanical strains. While the perovskite end members Bi(Mg 1/2Ti1/2)O3 and Bi(Ni1/2Ti 1/2)O3 display limited sta...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-80055020230&partnerID=40&md5=0224daae1e9ebfc2f3448911b253c8d2 http://cmuir.cmu.ac.th/handle/6653943832/6443 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | Lead-free compounds based on perovskite solid solutions in the ternary system (Bi1/2Na1/2)TiO3-(Bi1/2K 1/2)TiO3-Bi(X1/2Ti1/2)O 3, where X Ni and Mg have been shown to exhibit large electromechanical strains. While the perovskite end members Bi(Mg 1/2Ti1/2)O3 and Bi(Ni1/2Ti 1/2)O3 display limited stability in their pure state, both compounds were found to have solid solubilities of at least 50 mol. with (Bi1/2Na1/2)TiO3 and (Bi1/2K 1/2)TiO3. Most importantly, under relatively large applied fields, these materials exhibited large hysteretic electromechanical strains characterized by a parabolic shape. With effective piezoelectric coefficients (d33) greater than 500 pm/V, these systems have excellent potential as a Pb-free piezoelectric materials. © 2011 American Institute of Physics. |
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