Magnetic material with cooling capacity, a method for the manufacturing thereof and use of such material
AssigneesStichting voor de Technische Wetenschappen Utrecht, Universiteit van Amsterdam, Faculteit der Natuuwetenschappen, Wiskunde en Informatica, Amsterdam
InventorsEkkehard Hubertus Brück, Ojiyed Tegusi, Frank Roelof De Boer
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Abstract
The invention relates to a material that can be used for magnetic refrigeration, wherein the material substantially has the general formula (AYB1-Y)2+δCWDXEZ Wherein: A is selected from Mn and Co; B is selected from Fe and Cr; of C, D and E at least two are different, have a non-vanishing concentration and are selected from P, B, Se, Ge, Ga, Si, Sn and Sb; wherein at least one of C, D and E is Ge or Si; W, X, Y and Zeach is a number in the range 0-1, and W+X+Z=1; andδis a number from (−0.1)-(+0.1).
Claims20
A material that can be used for magnetic refrigeration, substantially having the general formula
- (AyB1-y)2+δCwDxEz
- wherein:
- A is selected from Mn and Co;
- B is selected from Fe and Cr;
- C, D and E are selected from P, B, Se, Ge, Ga, Si, Sn, N and Sb;
- w, x, y and z each denotes a concentration and is a number in the range greater than 0 to 1, and w+x+z=1;
- δ is a number from (−0.1)-(+0.1);
- and
- at least 90% of A is Mn;
- at least 90% of B is Fe;
- at least 90% of C is P;
- at least 90% of D is Ge;
- and at least 90% of E is Si.
A material that can be used for magnetic refrigeration, substantially having the general formula
- (AyB1-y)2+δCwDxEz
- wherein:
- A is selected from Mn and Co;
- B is selected from Fe and Cr;
- C, D and E are selected from P, B, Se, Ge, Ga, Si, Sn, N and Sb;
- w, x, y and z each denotes a concentration and is a number in the range greater than 0 to 1, and
- w+x+z=1;
- and
- δ is a number from (−0.1)-(+0.1);
- and
- wherein the material is in a hexagonal Fe2P structure;
- and
- wherein at least 90% of A is Mn;
- at least 90% of B is Fe;
- at least 90% of C is P;
- at least 90% of D is Ge;
- and at least 90% of E is Si.
A material that can be used for magnetic refrigeration, substantially having the general formula
- MnFe(PwGexSiz)
- wherein w, x, and z each denotes a concentration and is a number in the range greater than 0 to 1;
- w+x+z=1;
- and
- wherein the material is in a hexagonal Fe2P structure.
Dependencies are inferred from the claim text.