Ball SAW Sensors for Safety and Reliability of Fuel Cell Technologies

Abstract:

Article Preview

Detection of hydrogen gas is a crucial task for establishing safety and reliability of fuel cells, a key technology for the environment and our society. However, hydrogen is difficult to detect and various hydrogen sensors have many drawbacks. Here we report a novel hydrogen gas sensor, the ball surface acoustic wave (SAW) sensor, using Pd or PdNi sensitive film. The ball SAW sensor is based on a novel phenomenon, diffraction-free propagation of collimated beam along an equator of sphere. The resultant ultra-multiple roundtrips of SAW makes it possible to achieve highest sensitivity among SAW sensors. Moreover, it enables to use a very thin sensitive film, and consequently the shortest response time (2s) was realized. In terms of the sensing range, it has the widest range of 10 ppm to 100 % among any hydrogen sensors including FET or resistivity sensors. The ball SAW sensor can be applied not only to hydrogen but also to any gasses and possibly to liquids.

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

Pages:

48-52

DOI:

10.4028/www.scientific.net/KEM.321-323.48

Citation:

K. Yamanaka "Ball SAW Sensors for Safety and Reliability of Fuel Cell Technologies", Key Engineering Materials, Vols. 321-323, pp. 48-52, 2006

Online since:

October 2006

Authors:

Export:

Price:

$35.00

[1] R. C. Hughes and W. K. Schubert: J. Appl. Phys. 71 (1992) 542.

[2] S. Okuyama, K. Umemoto, K. Okuyama, S. Ohshima and K. Matsushita, Jpn. J. Appl. Phys. 36, (1997)6905.

[3] Ross C. Thomas and Robert C. Hughes: J. Electrochem. Soc. 144 (1997).

[4] P. Liu, S.H. Lee, H.M. Cheong, C.E. Tracy, J.R. Pitts and R.D. Smith: J. Electrochem. Soc. 149(2002).

[5] W.P. Jakubik, M.W. Urbanczyk, S. Kochowski and J. Bodzenta, Sens. Actuators B, 82, (2002) 265.

[6] M. Kadota, Jpn. J. Appl. Phys. 44 (2005) 4285.

[7] Hiroshi Kamizuma, Liyan Yang, Tatsuya Omori, Ken-ya Hashimoto and Masatsune Yamaguchi, Jpn. J. Appl. Phys. 44 (2005) 4535.

DOI: 10.1143/jjap.44.4535

[8] K. Yamanaka, H. cho and Y. Tsukahara: Appl. Phys. Lett. 76 (2000) 2797.

[9] K. Yamanaka, H. Cho and Y. Tsukahara, Tech. Rep. Inst. of Electronics, Information and Communication Engineers, vol. US2000-14, pp.49-56, (2000).

[10] Y. Tsukahara, N. Nakaso, H. Cho and K. Yamanaka: Appl. Phys. Lett. 77 (2000) 2926.

[11] S. Ishikawa, H. Cho, K. Yamanaka, N. Nakaso and Y. Tsukahara: Jpn. J. Appl. Phys. 40 (2001) 3623.

[12] N. Nakaso, Y. tsukahara, S. Ishikawa and K. Yamanaka: Proc. 2002 IEEE Ultrason. Symp. (2002) 47.

[13] S. Ishikawa, N. Nakaso, N. Takeda, T. Mihara, Y. Tsukahara and K. Yamanaka: Appl. Phys. Lett. 83 (2003) 4649.

[14] S. Akao, N. Nakaso, T. Ohgi and K. Yamanaka: Jpn. J. Appl. Phys.: 43 (2004) 3067.

[15] K. Yamanaka, S. Ishikawa, N. Nakaso, N. Takeda, T. Mihara and Y. Tsukahara: Proc. 2003 IEEE Ultrason. Symp. (2004) 299.

[16] K. Yamanaka, S. Ishikawa, N. Nakaso, N. Takeda, D-Y. Sim, T. Mihara, A. Mizukami, S. Akao and Y. Tsukahara: to be published in IEEE Trans. Sonics & Ultrason.

In order to see related information, you need to Login.