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:
Mar. 12, 2019
Filed:
Dec. 07, 2015
Basf SE, Ludwigshafen, DE;
Florian Scharf, Frankfurt, DE;
Markus Schwind, Madison, WI (US);
David Van Asten, Utrecht, NL;
Steven Alan Jacobs, Madison, WI (US);
BASF SE, Ludwigshafen, DE;
Abstract
A magnetocaloric cascade contains a sequence of magnetocaloric material layers having different Curie temperatures T, wherein the magnetocaloric material layers include a cold-side outer layer, a hot-side outer layer and at least three inner layers between the cold-side outer layer and the hot-side outer layer, and each pair of next neighboring magnetocaloric layers of the magnetocaloric cascade has a respective Curie-temperature difference amount ΔTbetween their respective Curie temperatures, wherein the hot-side outer layer or the cold-side outer layer or both the hot-side and cold-side outer layer exhibits a larger ratio mΔS/ΔTin comparison with any of the inner layers, m denoting the mass of the respective magnetocaloric material layer and ΔSdenoting a maximum amount of isothermal magnetic entropy change achievable in a magnetic phase transition of the respective magnetocaloric material layer.