Activation and Gas Sorption Properties of Nano-Size Titanium Powder Getters

Abstract:

Non-evaporable getters (NEGs) are characterized by two major properties i.e. the activation and gas sorption rate for specific gases. Most of the commercial getters are alloys composed of micron-size powders. There have been speculations on the advantage of using nanosize powders as getter material for the obvious increase in volume to surface area ratio and for effective reaction with gases on size reduced particles. In this study, titanium powders of about 80 nm were prepared by electrical wire explosion method and their gettering properties were measured in accordance to ASTM standard. The activation of nano-size titanium powders was completed at about 450oC and the sorption rate was over 4 times higher than those of the micron-size titanium powders.

• Periodical: Solid State Phenomena (Volumes 124-126)
• Pages: 1281-1284
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.124-126.1281
• Online since: June 2007
• Authors: Mi Young Park, Ho Ha, Won Baek Kim, Je Shin Park, Chang Youl Suh, Saet Byul Woo
• Keywords: Hydrogen Gas Sorption, Nanopowder, Non-Evaporation Getter (NEG), Titanium (Ti)

References

[1] C. Benvenuti, P. Chiggiato, F. Cicoira and Y. L'Aminot : J. Vac. Sci. Technol. A 16 (1998), p.148.

[2] C. Benvenuti, et al. : Vacuum Vol. 60 (2001), p.57.

[3] P. Chiggiato, P. Costa Pinto : Thin Solid Films, In Press, Corrected Proof (2005).

[4] R.L. Holtz, V. Provenzano, and M.A. Imam : NanoStruct. Mater. Vol. 7 (1996), p.259.

[5] S. Dong, G. Zou and H. Yang : Scripta Mater. Vol. 44 (2001), p.17.

[6] ASTM F798-97, American Society for Testing and Materials, Annual Book of ASTM Standards (1997).

[7] A.S. Edelstein and R.C. Cammarata, Nanomaterials: Synthesis, Properties and Applications, Institute of Physics Publishing, (1996).