Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Microstructures and Electrical Properties of PSN-PZT Ceramics for Piezoelectric Speaker

압전 스피커 응용을 위한 PSN-PZT계 세라믹스의 미세구조 분석 및 전기적 특성 평가

  • Kim, Sung-Jin (ZENIXON Co., LTD.) ;
  • Kweon, Soon-Yong (Department of Materials Science and Engineering, Korea National University of Transportation)
  • Received : 2018.11.21
  • Accepted : 2018.12.06
  • Published : 2019.03.01
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Abstract

$Pb(Sb_{0.5}Nb_{0.5})_x(Zr_{0.51}Ti_{0.49})_{1-x}O_3$ (abbreviation: PSN-PZT) ceramics were synthesized, using conventional bulk ceramic processing technology, with various PSN doping contents. The maximum density of PSN-PZT was 97% of the theoretical density in the samples sintered at $1,250^{\circ}C$. The maximum values of the piezoelectric properties achieved using the conventional processes were: $k_p$ of 0.625, $d_{33}$ of 531 pC/N, and $g_{33}$ of $33mV{\cdot}m/N$. Finally, we fabricated a piezo-speaker with the optimized PSN-PZT ceramics. The SPL of the speaker was measured at a distance of 1 m, with a driving voltage of $40V_{rms}$ in the frequency range of ~300 Hz to 9 kHz. The measured $SPL_{max}$ was at a very high level (95 dB), which was superior in quality in comparison with those of other commercial products.

Keywords

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Fig. 1. X-ray diffraction patterns of PSN-PZT ceramics at various PSN amounts of x (mole ratio): (a) 0.02, (b) 0.04, (c) 0.06, and (d) 0.08.

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Fig. 2. Sintering density of PSN-PZT ceramics as a function of PSN composition.

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Fig. 3. SEM images of PSN-PZT ceramics at various PSN compositions of x: (a) 0.02, (b) 0.04, (c) 0.06, and (d) 0.08.

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Fig. 4. Dependence of electromechanical coupling factor (kp) and mechanical quality factor (Qm) on PSN composition in PSN-PZT ceramics.

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Fig. 5. Variation of relative dielectric constant (ɛr) with different doping amounts of PSN in PSN-PZT ceramics.

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Fig. 6. Effects of PSN composition on piezoelectric charge constant (d33) and piezoelectric voltage constant (g33) in PSN-PZT ceramics.

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Fig. 7. The SPL of the piezoelectric speaker measured without (closed circle) and with (open square) an additional vibration media.

References

  1. S. J. Kim, Electr. Electron. Mater. 19, 13 (2006).
  2. S. H. Lee, Electr. Electron. Mater. 19, 24 (2006).
  3. S. K. Kim, Electr. Electron. Mater. 19, 33 (2006).
  4. S. H. Lee, K. W. Seo, K. P. Ryu, and S. Y. Kweon, J. Korean Inst. Electr. Electron. Mater. Eng., 19, 531 (2006). [DOI: https://doi.org/10.4313/jkem.2006.19.6.531]
  5. Y. H. Son, S. J. Kim, Y. M. kim, J. S. Jeong, S. L. Ryu, and S. Y. Kweon, J. Korean Inst. Electr. Electron. Mater. Eng., 19, 966 (2006). [DOI: https://doi.org/10.4313/jkem.2006.19.10.966]
  6. Y. Xu, Ferroelectric Materials and Their Application (Elsevier Science, Amsterdam, 1991) p. 104.
  7. M. S. Yoon, I. Mahmud, and S. C. Ur, Ceram. Int., 39, 8581 (2013). [DOI: https://doi.org/10.1016/j.ceramint.2013.04.031]
  8. Y. H. Na, M. S. Lee, J. S. Yun, Y. W. Hong, J. H. Paik, J. H. Cho, J. W. Lee, and Y. H. Jeong, J. Korean Inst. Electr. Electron. Mater. Eng., 31, 462 (2018). [DOI: https://doi.org/10.4313/JKEM.2018.31.7.462]
  9. J. H. Yoo, W. H. Woo, D. O. Oh, Y. H. Jeong, K. H. Chung, and S. L. Lyu, J. Korean Inst. Electr. Electron. Mater. Eng., 16, 1195 (2003). [DOI: https://doi.org/10.4313/jkem.2003.16.12s.1195]
  10. J. W. Choi, K. H. Song, H. J. Kim, S. J. Yoon, and K. S. Yoo, J. Sens. Sci. Technol., 16, 120 (2007). [DOI: https://doi.org/10.5369/jsst.2007.16.2.120]
  11. J. B. Choi, K. H. Song, H. J. Kim, S. I. Hwang, and K. S. Yoo, J. Sens. Sci. Technol., 17, 127 (2008). [DOI: https://doi.org/10.5369/jsst.2008.17.2.127]
  12. IRE Standard Committee, Proc. IRE Standards on Piezoelectric Crystals: Determination of the Elastic, Piezoelectric, and Dielectric Constants-The Electromechanical Coupling Factor, 1958 (IEEE, 1958) p. 764.
  13. IRE Standard Committee, Proc. IRE Standards on Piezoelectric Crystals: Measurements of Piezoelectric Ceramics, 1961 (IEEE, 1961) p. 1161.
  14. Standard Test Method for Water Absorption, Bulk Density, Apparent Porosity, and Apparent Specific Gravity for Fired White Ware Products, ASTM C373-72, 1972.