과제정보
This study received technical advice and guidance from Jeong Kyeong-won, CEO of IMTS Co., Ltd. while I serving as CEO of Sincerus Materials Co., Ltd. in 2016, and obtained a piezoelectric coefficient value (d33) of 260pm/V in 2019, and 300pm, which can be considered a commercialization level. Research experiments began in earnest to obtain values higher than 300pm/V. In order to find the optimal BNKT composition ratio, with the help of Dr. Chang-Young Koo of Quintes Co., Ltd., the result of continuous research and experiments along with application, advice, and guidance of already commercialized lead-free piezoelectric liquid (sol-gel) technology was 310.59 in March 2023. It was possible to obtain the piezoelectric coefficient (d33) value of pm/V. Lab researchers who worked with us to achieve successful research experiments and obtain quantitative target values (piezoelectric coefficient, d33) at the level required by the biomedical market, and Jeong Gyeong-won of IMTS Co., Ltd., who served as a bridge for us to be introduced to and encounter this technology for the first time. We would like to express our deepest gratitude to Dr. Chang-Young Koo, CEO of Quintes Co., Ltd., for providing technical support and guidance through the research and development of lead-free piezoelectric ceramic materials for low-temperature firing with a core-shell structure and ultimately successful commercialization. This study has been supported by MOTIE funding program "Advanced Graduate Education for Management of Convergence Technology".
참고문헌
- Bell, A.J. and Deubzer, O., Lead-free piezoelectrics- The environmental and regulatory issues, MRS Bulletin, 2018, Vol. 43, No. 8, pp. 581-587. https://doi.org/10.1557/mrs.2018.154
- Chen, H., Ren, T. L., Wu, X. M., Yang, Y., & Liu, L. T. : Giant electrocaloric effect in lead-free thin film of strontium bismuth tantalite. Applied Physics Letters, 2009, Vol. 94, No. 18.
- Chiang, Y.M., Farrey, G.W., and Soukhojak, A.N., Lead-free high-strain single-crystal piezoelectrics in the alkaline- bismuth- titanate perovskite family, Applied Physics Letters, 1998, Vol. 73, No. 25, pp. 3683-3685. https://doi.org/10.1063/1.122862
- Do, N.B., Lee, H.B., Le, D.T., Jeong, S.K., Kim, I.W., Tai, W.P., and Lee, J.S., Electric field-induced strain of lead-free Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3 ceramics modified with LiTaO3, Current Applied Physics, 2011, Vol. 11, No. 3, pp. S134-S137. https://doi.org/10.1016/j.cap.2011.03.044
- Kim, D.S., Kim, B.C., Han, S.H., Kang, H.W., Kim, J.S., and Cheon, C.I., Direct and indirect measurements of the electro-caloric effect in (Bi, Na) TiO3-SrTiO3 ceramics, Journal of Applied Physics, 2019, Vol. 126, No. 23.
- Kim, S.H., Lee, D.S., Hwang, C.S., Kim, D.J., and Kingon, A.I., Thermally induced voltage offsets in Pb (Zr, Ti) O3 thin films, Applied Physics Letters, 2000, Vol. 77, No. 19, pp. 3036-3038. https://doi.org/10.1063/1.1324001
- Morita, T., Wagatsuma, Y., Cho, Y., Morioka, H., Funakubo, H., and Setter, N., Ferroelectric properties of an epitaxial lead zirconate titanate thin film deposited by a hydrothermal method below the Curie temperature, Applied Physics Letters, 2004, Vol. 84, No. 25, pp. 5094-5096. https://doi.org/10.1063/1.1762973
- Naderer, M., Schutz, D., Kainz, T., Reichmann, K., and Mittermayr, F., The formation of secondary phases in Bi0.5Na0.375K0.125TiO3 ceramics, Journal of the European Ceramic Society, 2012, Vol. 32, No. 10, pp. 2399-2404. https://doi.org/10.1016/j.jeurceramsoc.2012.02.031
- Nakashima, Y., Sakamoto, W., Maiwa, H., Shimura, T., and Yogo, T., Lead-free piezoelectric (K, Na) NbO3 thin films derived from metal alkoxide precursors, Japanese Journal of Applied Physics, 2007, Vol. 46, No. 4L, pp. L311.
- Park, J.S., Jeon, C.J., Jeong, Y.H., Yun, J.S., and Cho, J. H., Crystal structures and domain patterns of unpoled and poled Bi0.5Na0.78K0.22)0.5 TiO3 ceramics by TEM, Materials Letters, 2016, Vol. 167, pp. 218-221. https://doi.org/10.1016/j.matlet.2016.01.011
- Rodel, J. and Li, J.F., Lead-free piezoceramics: Status and perspectives, MRS Bulletin, 2018, Vol. 43, pp. 576-580. https://doi.org/10.1557/mrs.2018.181
- Sakata, K. and Masuda, Y., Ferroelectric and Antiferroelectric Properties of (Na0.5Bi0.5)TiO3-SrTiO3 Solid Solution Ceramics, Ferroelectrics, 1974, Vol. 7, pp. 347-349. https://doi.org/10.1080/00150197408238042
- Sasaki, A., Chiba, T., Mamiya, Y., and Otsuki, E., Dielectric and piezoelectric properties of (Bi0.5Na0.5) TiO3 - (Bi0.5K0.5) TiO3 systems, Japanese Journal of Applied Physics, 1999, Vol 38, No. 9S, p. 5564.
- Schorn, P., Ellerkmann, U., Bolten, D., Boettger, U., and Waser, R., Non-linear imprint behavior of PZT thin films, Integrated Ferroelectrics, 2011, Vol. 53, No. 1, pp. 361-369. https://doi.org/10.1080/10584580390258282
- Seifert, K.T., Jo, W., and Rodel, J., Temperature-insensitive large strain of (Bi1/2Na1/2) TiO3-(Bi1/2K1/2) TiO3-(K0.5Na0.5) NbO3 lead-free piezoceramics, Journal of the American Ceramic Society, 2010, Vol. 93, No. 5, pp. 1392-1396. https://doi.org/10.1111/j.1551-2916.2009.03573.x
- Takenaka, T., Maruyama, K.I.M.K.I., and Sakata, K.S. K., (Bi1/2Na1/2) TiO3-BaTiO3 system for lead-free piezoelectric ceramics, Japanese Journal of Applied Physics, 1991, Vol. 30, No. 9S, p. 2236.
- Wang, D.Y., Lin, D.M., Wong, K.S., Kwok, K.W., Dai, J.Y., and Chan, H.L.W., Piezoresponse and ferroelectric properties of lead-free [Bi0.5 (Na0.7K0.2Li0.1)0.5] TiO3 thin films by pulsed laser deposition, Applied Physics Letters, 2008, Vol. 92, No. 22.
- Xu, R., Shen, M., Ge, S., Gan, Z., and Cao, W., Dielectric enhancement of sol- gel derived BaTiO3/SrTiO3 multilayered thin films, Thin Solid Films, 2002, Vol. 406, No. 1-2, pp. 113-117. https://doi.org/10.1016/S0040-6090(02)00050-0
- Yoon, J.G., Structural Characteristics of Sputter-Deposited Pb (Zr, Ti) O3/ZnO Heterostructure Films, Journal of the Korean Physical Society, 2008, Vol. 53, No. 4.
- Yoon, J.G., Jung, K.O., Kim, H.J., and Kim, K.S., Charge Transfer at the Interfaces of Polycrystalline ZnO/Zn1-xMgxO/ZnO Heterostructures, Journal of the Korean Physical Society, 2008, Vol. 53, No. 4, pp. 2033-2038. https://doi.org/10.3938/jkps.53.2033