Invention Grant
- Patent Title: Tungsten electrode material and thermionic emission current measuring device
- Patent Title (中): 钨电极材料和热电子发射电流测量装置
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Application No.: US13133338Application Date: 2009-12-08
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Publication No.: US09502201B2Publication Date: 2016-11-22
- Inventor: Seiji Nakabayashi , Masahiro Katoh , Yoshiharu Yamamoto , Toshihiko Yoshida , Norihiko Hasegawa
- Applicant: Seiji Nakabayashi , Masahiro Katoh , Yoshiharu Yamamoto , Toshihiko Yoshida , Norihiko Hasegawa
- Applicant Address: JP Tokyo
- Assignee: A.L.M.T. Corp.
- Current Assignee: A.L.M.T. Corp.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2008-312158 20081208; JP2008-312355 20081208; JP2009-263771 20091119; JP2009-274346 20091202
- International Application: PCT/JP2009/070503 WO 20091208
- International Announcement: WO2010/067781 WO 20100617
- Main IPC: H01B1/08
- IPC: H01B1/08 ; H01J1/146 ; H01J9/42 ; H01J61/073

Abstract:
Provided is a tungsten electrode material that can improve the life of an electrode than conventional by the use of a material in place of thorium oxide. The tungsten electrode material includes a tungsten base alloy and oxide particles dispersed in the tungsten base alloy, wherein the oxide particle is an oxide solid solution in which a Zr oxide and/or a Hf oxide and an oxide of at least one or more kinds of rare earth elements selected from Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are solid-dissolved.
Public/Granted literature
- US20110243184A1 TUNGSTEN ELECTRODE MATERIAL AND THERMIONIC EMISSION CURRENT MEASURING DEVICE Public/Granted day:2011-10-06
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