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:
Jul. 12, 2022
Filed:
Feb. 26, 2018
Hitachi, Ltd., Tokyo, JP;
Motomune Kodama, Tokyo, JP;
Hideki Tanaka, Tokyo, JP;
Takaaki Suzuki, Tokyo, JP;
Junichi Shimoyama, Sagamihara, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
The following two problems arise when carbon is added to a starting material powder in the process of production of an MgBsuperconductor: (1) an impurity phase increases; and (2) the degree of substitution of carbon at boron sites is spatially non-uniform. This superconductor production method comprises: a mixing step of mixing a starting material powder and an additive; and a heat treatment step of heat-treating the mixture prepared in the mixing step. The starting material powder is MgBpowder or a mixed powder of magnesium and boron, and the additive is an Mg—B—C compound containing three elements of magnesium, boron and carbon.