The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 2010
Filed:
Aug. 08, 2007
Jinshu Wang, Beijing, CN;
Wei Liu, Beijing, CN;
Meiling Zhou, Beijing, CN;
Yiman Wang, Beijing, CN;
Hongyi LI, Beijing, CN;
Tieyong Zuo, Beijing, CN;
Jinshu Wang, Beijing, CN;
Wei Liu, Beijing, CN;
Meiling Zhou, Beijing, CN;
Yiman Wang, Beijing, CN;
Hongyi Li, Beijing, CN;
Tieyong Zuo, Beijing, CN;
Beijing University of Technology, Beijing, CN;
Abstract
In a method of manufacturing a pressed scandate dispenser cathode, firstly, scandium nitrate, barium nitrate, calcium nitrate, aluminum nitrate and ammonium metatungstate (AMT) are dissolved in de-ionized water, respectively, and then mixed with a solution of a cross-link agent such as citric acid and HO. After water bathing, the mixed aqueous solution turns into gel, and the powders are obtained after the gel calcination. Secondly, the calcined powders are reduced by hydrogen. Finally, the reduced powders are pressed into shapes and then sintered in the furnace with the atmosphere of hydrogen or by Spark Plasma Sintering (SPS 3.202-MK-V) in vacuum.