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Lead-Free Piezoelectric Ceramic Based on (Bi 1/2 Na 1/2 )TiO 3-(Bi 1/2 K1/2 )TiO 3-BaTiO 3 Solid Solution
Paper Type  |
Contributed Paper |
Title |
Lead-Free Piezoelectric Ceramic Based on (Bi 1/2 Na 1/2 )TiO 3-(Bi 1/2 K1/2 )TiO 3-BaTiO 3 Solid Solution |
Author |
Yuji Hiruma, Y oichi Makiuchi, Rintaro Aoyagi, Hajime Nagata and T adashi T ak enak a* |
Email |
tadashi@ee.noda.tus.ac.jp |
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Abstract: Piezoelectric properties of a solid solution based on three components of bismuth sodium titanate, (Bi1/2Na1/2)TiO3(BNT), bismuth potassium titanate, (Bi1/2K1/2)TiO3(BKT), and barium titanate, BaTiO3 (BT), that is, x(Bi1/2Na1/2)TiO3-y(Bi1/2K1/2)TiO3-zBaTiO3 [abbreviated to BNBKy:z(x); y:z=2:1, 4:1 and 10:1, x+y+z=1] are studied as a lead-free piezoelectric material. The highest electromechanical coupling factor, k33, and piezoelectric constant, d33, were 0.56 and 186 pC/N for BNBK2:1(0.878), 0.56 and 191 pC/N for BNBK4:1(0.852), and 0.52 and 180 pC/N for BNBK10:1(0.826). Nevertheless, the second phase transitions, T2, of these compositions are about 120ºC. The T2s shift to higher temperatures with decreasing the amount (x) of BNT content. Finally, the T2 higher than 200ºC was obtained with x £ 0.75, that the k33 and d33 for BNBK2:1(0.75) and BNBK4:1(0.75) were 0.44 and 116 pC/N, and 0.45 and 134 pC/N, respectively.
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Start & End Page |
253 - 260 |
Received Date |
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Revised Date |
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Accepted Date |
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Full Text |
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Keyword |
antiferroelectric, barium titanate, bismuth potassium titanate, bismuth sodium titanate, ferroelectric, lead-free piezoelectric ceramics |
Volume |
Vol.32 No.3 (SEPTEMBER 2005) |
DOI |
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Citation |
Hiruma Y., Makiuchi Y.O., Aoyagi R., Nagata H. and A* T.A.T.A.E., Lead-Free Piezoelectric Ceramic Based on (Bi 1/2 Na 1/2 )TiO 3-(Bi 1/2 K1/2 )TiO 3-BaTiO 3 Solid Solution, Chiang Mai Journal of Science, 2005; 32(3): 253-260. |
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