Title:
TUNGSTEN ELECTRODE MATERIAL AND THERMAL ELECTRON EMISSION CURRENT MEASUREMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/067781
Kind Code:
A1
Abstract:
Provided is a tungsten electrode material which uses a material to replace thorium oxide so as to improve the electrode service life as compared to the conventional technique. The tungsten electrode material has a tungsten base and oxide particles dispersed in the tungsten base. The oxide particles are prepared as an oxide solid solution containing in a solid solved state: a Zr oxide and/or a Hf oxide and an oxide of at least one rare earth selected from a group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu.
Inventors:
NAKABAYASHI SEIJI (JP)
KATOH MASAHIRO (JP)
YAMAMOTO YOSHIHARU (JP)
YOSHIDA TOSHIHIKO (JP)
HASEGAWA NORIHIKO (JP)
KATOH MASAHIRO (JP)
YAMAMOTO YOSHIHARU (JP)
YOSHIDA TOSHIHIKO (JP)
HASEGAWA NORIHIKO (JP)
Application Number:
PCT/JP2009/070503
Publication Date:
June 17, 2010
Filing Date:
December 08, 2009
Export Citation:
Assignee:
ALMT CORP (JP)
NAKABAYASHI SEIJI (JP)
KATOH MASAHIRO (JP)
YAMAMOTO YOSHIHARU (JP)
YOSHIDA TOSHIHIKO (JP)
HASEGAWA NORIHIKO (JP)
NAKABAYASHI SEIJI (JP)
KATOH MASAHIRO (JP)
YAMAMOTO YOSHIHARU (JP)
YOSHIDA TOSHIHIKO (JP)
HASEGAWA NORIHIKO (JP)
International Classes:
H01J61/06; H01J9/42
Foreign References:
| JP2006286236A | 2006-10-19 | |||
| JP2005519435A | 2005-06-30 | |||
| JP2005285676A | 2005-10-13 | |||
| JP2007517664A | 2007-07-05 | |||
| JP2001050916A | 2001-02-23 | |||
| JP2007327766A | 2007-12-20 |
Other References:
See also references of EP 2375438A4
Attorney, Agent or Firm:
IKEDA, Noriyasu et al. (JP)
Noriyasu Ikeda (JP)
Noriyasu Ikeda (JP)
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