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:
Jun. 19, 2018
Filed:
Mar. 22, 2017
Colorado State University Research Foundation, Fort Collins, CO (US);
Casey Farnell, Fort Collins, CO (US);
Cody Farnell, Fort Collins, CO (US);
John Williams, Fort Collins, CO (US);
Desiree Williams, Fort Collins, CO (US);
Bao Gia Nguyen, Fort Collins, CO (US);
Kathryn Elizabeth Greiner, Fort Collins, CO (US);
Ryan Kenneth Ham, Fort Collins, CO (US);
Colorado State University Research Foundation, Fort Collins, CO (US);
Abstract
In an example, a method to form a low work function insert includes preparing a mixture that includes a first powder that contains barium, a second powder that contains calcium, a third powder that contains at least one of aluminum, samarium, or magnesium, and a fourth powder that contains a refractory metal. The method may also include heating the mixture, contained in a crucible, in a furnace. Oxygen concentration in the furnace may be maintained at a low partial pressure during heating of the mixture in the furnace. The low work function of the insert allows electrons to be readily extracted from its surface.