公开(公告)号：US09887027B2

公开(公告)日：2018-02-06

申请号：US15025129

申请日：2014-09-25

Applicant: BASF SE

Inventor： Kerstin Schierle-Arndt ,  Fabian Seeler ,  Markus Schwind ,  Jerome Francois

IPC: C09K5/00 ,  H01F1/44 ,  C23F11/18 ,  F25B21/00 ,  C23F11/08 ,  C23F11/14 ,  C23F11/167 ,  H01F1/01

CPC classification number: H01F1/442 ,  C23F11/08 ,  C23F11/149 ,  C23F11/1676 ,  C23F11/187 ,  C23F11/188 ,  F25B21/00 ,  F25B2321/002 ,  H01F1/015 ,  Y02B30/66

Abstract: Use of a composition (A) having a pH of at least 8 at 25° C. containing at least 50 wt.-% of water or a water containing solvent mixture, at least 0.1 mol/m3 of at least one water soluble silicate, optionally at least one molybdate, optionally at least one phosphonate, optionally at least one azole, optionally at least one additional freezing point depressing salt, optionally at least one phosphate, and optionally at least one nitrate, as heat carrier medium for magnetocaloric materials of formula (I) (AyB1−y)2+uCwDxEz (I) where: A is Mn or Co, B is Fe, Cr or Ni, C is Ge, As or Si, D is different from C and is selected from P, B, Se, Ge, Ga, Si, Sn, N, As and Sb, E may be same or different from C and D and is selected from P, B, Se, Ge, Ga, Si, Sn, N, As and Sb.

公开(公告)号：US10229775B2

公开(公告)日：2019-03-12

申请号：US15535621

申请日：2015-12-07

Applicant: BASF SE

Inventor： Florian Scharf ,  Markus Schwind ,  David Van Asten ,  Steven Alan Jacobs

IPC: F25B21/00 ,  H01F1/01

Abstract: A magnetocaloric cascade contains a sequence of magnetocaloric material layers having different Curie temperatures TC, 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 ΔTC between 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 mΔSmax/ΔTC in comparison with any of the inner layers, m denoting the mass of the respective magnetocaloric material layer and ΔSmax denoting a maximum amount of isothermal magnetic entropy change achievable in a magnetic phase transition of the respective magnetocaloric material layer.