Jpn. J. Appl. Phys. 44 (2005) pp. 6873-6877  |Next Article|  |Table of Contents|
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A Low Temperature Preparation of BaTiO₃ Thin Film by Sol-Gel-Hydrothermal Treatment below 210°C

Takuji Naoyama, Youji Sakioka, Minoru Noda, Masanori Okuyama and Keisuke Saito¹

(Received May 17, 2005; accepted July 13, 2005; published September 22, 2005)

BaTiO₃ thin films with a perovskite structure have been prepared by the hydrohermal treatment of TiO₂ gel films at temperatures below 210°C. The TiO₂ gel films were produced at 200°C by the sol-gel method and then were transformed into crystalline BaTiO₃ thin films with the hydrothermal treatment in Ba(OH)₂ alkaline aqueous solutions below 210°C. The hydrothermal crystallization of BaTiO₃ thin films depends remarkably on the prebaking temperature of the TiO₂ gel film, and the morphology depends on the Ba(OH)₂ concentration, but the crystalline structure is not changed according to the results of XRD θ-2θ and reciprocal space mapping measurements. The microscopic structure is columnar for BaTiO₃ thin films treated in Ba(OH)₂ solutions greater than 0.3 M and is granular for those treated in solutions less than 0.2 M. The morphology of the BaTiO₃ thin film treated in 0.2 M Ba(OH)₂ solution is an island structure near the surface and granular near the bottom. The BaTiO₃ thin film treated at 210°C for 3 h in 0.2 M Ba(OH)₂ solution has a hysteresis loop showing 5 µC/cm² at zero electric field.

URL: http://jjap.jsap.jp/link?JJAP/44/6873/
DOI: 10.1143/JJAP.44.6873
KEYWORDS:BaTiO₃, thin film, hydrothermal, sol-gel, low-temperature preparation

References | Citing Articles (6)

1. Z. Wei, K. Yamashita and M. Okuyama: Jpn. J. Appl. Phys. 40 (2001) 5539[JSAP].
2. T. Morita and Y. Cho: Jpn. J. Appl. Phys. 43 (2004) 6535[JSAP].
3. T. Morita and Y. Cho: Appl. Phys. Lett. 85 (2004) 2331[AIP Scitation].
4. Z. Wei, H. Xu, K. Yamashita and M. Okuyama: Jpn. J. Appl. Phys. 39 (2000) 4217[JSAP].
5. Z. Wei, M. Noda and M. Okuyama: Integr. Ferroelectr. 52 (2003) 2003.
6. L. Liu, Q. Lu, J. Yin, X. Qian, W. Wang, Z. Zhu and Z. Wang: Mater. Chem. Phys. 74 (2002) 210.
7. Q. Hu and E. Marand: Polymer 40 (1999) 4833.
8. S. Music, M. Gotic, M. Ivanda, S. Popovic, A. Turkovic, R. Trojko, A. Sekulic and K. Furic: Mat. Sci. Eng. B 47 (1997) 33.
9. J. Araña, J. M. Doña-Rodríguez, C. Garriga i Cabo, O. González-Díaz, J. A. Herrera-Melián and J. Pérez-Peña: Appl. Catal. B Environ. 53 (2004) 221.
10. K. A. Laudise and A. A. Ballman: J. Am. Chem. Soc. 80 (1958) 2655[CrossRef].
11. J. O. Eckert, C. C. Hung-Houston, B. L. Gersten, M. M. Lencka and R. E. Riman: J. Am. Ceram. Soc. 79 (1996) 2929[CrossRef].
12. W. Hertly: J. Am. Ceram. Soc. 71 (1988) 879[CrossRef].
13. P. Princelop, C. Courtois, J. Vicens, A. Leriche and B. Thierry: J. Eur. Ceram. Soc. 19 (1999) 973.
14. M. M. Lencka, E. Nielsen, A. Anderko and R. E. Riman: Chem. Mater. 9 (1997) 1116.
15. M. M. Lencka and R. E. Riman: Chem. Mater. 5 (1993) 61.