Title:
IMPREGNATION TYPE SCANDIUM OXIDE DOPED RHENIUM-TUNGSTEN MULTI-PHASE MIXED BASED DISPENSER CATHODE AND PREPARATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/000447
Kind Code:
A1
Abstract:
An impregnation type scandium oxide doped rhenium-tungsten multi-phase mixed based dispenser cathode and a preparation method, relating to the technical field of refractory metal cathodes. A cathode matrix is a porous body prepared by multi-phase alloy powder, which is formed by scandium oxide doped rhenium and tungsten, by means of a powder metallurgy method; and then, active salt is impregnated into the matrix and the cathode surface is post-treated to form a cathode having electron emission capability. The cathode prepared by the method has the characteristics of high emission current density and good repeatability, and is applicable to electric vacuum devices and electronic beam sources requiring high current density.
Inventors:
WANG JINSHU (CN)
YANG YUNFEI (CN)
LIU WEI (CN)
WANG YIMAN (CN)
ZHOU FAN (CN)
WU HAO (CN)
LI SHILEI (CN)
ZHANG XIAOKE (CN)
ZHOU WENYUAN (CN)
YANG YUNFEI (CN)
LIU WEI (CN)
WANG YIMAN (CN)
ZHOU FAN (CN)
WU HAO (CN)
LI SHILEI (CN)
ZHANG XIAOKE (CN)
ZHOU WENYUAN (CN)
Application Number:
PCT/CN2019/110918
Publication Date:
January 07, 2021
Filing Date:
October 14, 2019
Export Citation:
Assignee:
UNIV BEIJING TECHNOLOGY (CN)
International Classes:
B22F9/16
Foreign References:
| CN110303165A | 2019-10-08 | |||
| CN109390195A | 2019-02-26 | |||
| CN1402291A | 2003-03-12 | |||
| CN101764006A | 2010-06-30 | |||
| CN101386076A | 2009-03-18 | |||
| CN103769581A | 2014-05-07 | |||
| CN102628136A | 2012-08-08 | |||
| US5007874A | 1991-04-16 |
Attorney, Agent or Firm:
BEIJING SHTD IP AGENCY LTD. (CN)
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