Browse > Article
http://dx.doi.org/10.3740/MRSK.2009.19.4.198

Structural and Piezoelectric Properties of MnO2-Doped PZT-PSN Ceramics for Ultrasonic Vibrator  

Cha, Yoo-Jeong (Electronic Components Lab., Korea Institute of Ceramic Eng. & Tech.)
Kim, Chang-Il (Electronic Components Lab., Korea Institute of Ceramic Eng. & Tech.)
Kim, Kyoung-Jun (Department of Materials Science and Engineering, Korea University)
Jeong, Young-Hun (Electronic Components Lab., Korea Institute of Ceramic Eng. & Tech.)
Lee, Young-Jin (Electronic Components Lab., Korea Institute of Ceramic Eng. & Tech.)
Lee, Hai-Gun (Department of Materials Science and Engineering, Korea University)
Paik, Jong-Hoo (Electronic Components Lab., Korea Institute of Ceramic Eng. & Tech.)
Publication Information
Korean Journal of Materials Research / v.19, no.4, 2009 , pp. 198-202 More about this Journal
Abstract
For use in ultrasonic actuators, we investigated the structural and piezoelectric properties of $(1\;-\;x)Pb(Zr_{0.515}Ti_{0.485})O_3$ - $xPb(Sb_{1/2}Nb_{1/2})O_3$ + 0.5 wt% $MnO_2$ [(1 - x)PZT - xPSN + $MnO_2$] ceramics with a variation of x (x = 0.02, 0.04, 0.06, 0.08). All the ceramics, which were sintered at $1250^{\circ}C$ for 2 h, showed a typical perovskite structure, implying that they were well synthesized. A homogeneous micro structure was also developed for the specimens, and their average grain size was slightly decreased to $1.3{\mu}m$ by increasing x to 0.8. Moreover, a second phase with a pyrochlore structure appeared when x was above 0.06, which resulted in the deterioration of their piezoelectric properties. However, the 0.96PZT-0.04PSN+$MnO_2$ ceramics, which corresponds with a morphotropic phase boundary (MPB) composition in the (1 - x)PZT - xPSN + $MnO_2$ system, exhibited good piezoelectric properties: a piezoelectric constant ($d_{33}$) of 325 pC/N, an electromechanical coupling factor ($k_p$) of 70.8%, and a mechanical quality factor ($Q_m$) of 1779. The specimens with a relatively high curie temperature ($T_c$) of $305^{\circ}C$ also showed a significantly high dielectric constant (${\varepsilon}_r$) value of 1109. Therefore, the 0.96PZT - 0.04PSN + $MnO_2$ ceramics are suitable for use in ultrasonic vibrators.
Keywords
piezoelectric; MPB; ultrasonic; vibrator; ceramic;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
연도 인용수 순위
1 J. A. Paradiso and T. Starner, IEEE Pervasive Comput., 4(1), 18 (2005)   DOI   ScienceOn
2 E. G. Fesnko, Ferroelectrics, 41, 137 (1982)   DOI   ScienceOn
3 K. Uchino, Piezoelectric and Electrostrictive Actuator, in Proceedings of the 6th IEEE International Symposium on Applications of Ferroelectrics, (Institute of Electrical and Electronics Engineers, Bethlehem, PA, USA, 1986) p.610
4 J. R. Sohn, Ph. D. Thesis (in Korean), Chungbuk University, Cheongju (1997)
5 Y. Kawamura and H. Ohuchi, Jpn. J. Appl. Phys., 33(9B), 5332 (1994)   DOI
6 B. Jaffe, W. R. Cook and H. Jaffe, Piezoelectric Ceramics, p.140, Academic Press, London, (1971)
7 A. J. Moulson and J. M. Herbert, Electroceramics, 2nd ed., p.355, Wiley, New York, USA (1990)
8 H. Y. Chen, X. B. Guo and Z. Y. Meng, Mater. Chem. Phys., 75, 136 (1992)
9 F. Kulcsar, J. Am. Ceram. Soc., 42(1), 49 (1959)   DOI
10 J. W. Choi, K. H. Song, H. J. Kim, S. J. Yoon and K. S. Yoo, J. Kor. Sens. Soc., 16(2), 120 (2007)   DOI
11 H. Ouchi, M. Bnishida and S. Hayakawa, J. Am. Ceram. Soc., 49, 166 (1966)   DOI
12 W. L. Zhong, Ferroelectrics Lett., 2, 557 (1984)
13 EMAS-6001(in Japan), Electronic materials manufactures association of Japan Standards (1997)
14 M. P. Kassarjian, R. E. Newhnam and J. V. Biggers, Am. Ceram. Soc. Bull., 64(8), 1103 (1985)
15 T. R. Shrout and A. Halliyal, Am. Ceram. Soc. Bull., 66(4), 704 (1987)
16 B. Jaffe, R. S. Roth and S. Mazullo, J. Appl. Phys., 25(6), 809 (1954).)   DOI
17 Korea Institute of Science and Technology Information, Piezoelectric Ceramics (in Korean), Retrieved December, 2002 from http://register.itfind.or.kr/Report/200301/IITA/ IITA-0745/IITA-0745.pdf