Heat carrier medium for magnetocaloric materials
AssigneeBASF SE
InventorsFabian Seeler, Georg Degen
Life of this patent
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Abstract
What is described is the use of alcohols, alcoholamines, diols, polyols or mixtures thereof in heat carrier media or as heat carrier media which are in contact with magnetocaloric materials.
Claims9
A composition comprising an aqueous heat carrier medium for magnetic coolers, magnetic heat pumps and magnetic generators, the aqueous heat carrier medium comprising 10 to 70% by weight of water miscible alcohols, diols, polyols or mixtures thereof and having a pH of at least 8, in contact with a magnetocaloric material,
- wherein the magnetocaloric material is a compound selected from the group consisting of
- La(FexAl1−x)13Hy and La(FexSi1−x)13Hy
- wherein x is a number from 0.7 to 0.95, and y is a number from 0 to 3.
A composition comprising an aqueous heat carrier medium for magnetic coolers, magnetic heat pumps and magnetic generators, the aqueous heat carrier medium comprising 10 to 70% by weight of water miscible alcohols, diols, polyols or mixtures thereof and having a pH of at least 8, in contact with a magnetocaloric material,
- wherein the magnetocaloric material is a compound selected from the group consisting of:
- La(FexAlyCoz)13 or La(FexSiyCoz)13
- wherein x is a number from 0.7 to 0.95, y is a number from 0.05 to 1 −x, and z is a number from 0.005 to 0.5;
- and
- LaMnxFe2−xGe
- wherein x is a number from 1.7 to 1.95;
- or
- a Heusler alloy of the MnTP type where T is a transition metal and P is a p-doping metal having an electron count per atom e/a in the range from 7 to 8.5.
Dependencies are inferred from the claim text.