Material for magnetic refrigeration preparation and application
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-021/00
C09K-005/00
C04B-035/00
C09D-005/23
출원번호
US-0769658
(2004-01-30)
우선권정보
NL-1018668(2001-07-31)
발명자
/ 주소
Br체ck,Ekkehard Hubertus
Tegusi,Ojiyed
De Boer,Frank Roelof
출원인 / 주소
Stichting voor de Technische Wetenschappen
Universiteit van Amsterdam, faculteit der Natuurwetenschappen
대리인 / 주소
Peacock Myers, P.C.
인용정보
피인용 횟수 :
9인용 특허 :
2
초록▼
A material that can be used for magnetic refrigeration, wherein the material substantially has the general formula (AY B1-y)2+δC1-xDx) wherein A is selected from Mn and Co; B is selected from Fe and Cr; C and D are different and are selected from P, As, B, Se, Ge, Si and Sb; x and y each is a n
A material that can be used for magnetic refrigeration, wherein the material substantially has the general formula (AY B1-y)2+δC1-xDx) wherein A is selected from Mn and Co; B is selected from Fe and Cr; C and D are different and are selected from P, As, B, Se, Ge, Si and Sb; x and y each is a number in the range 0-1; and δ is a number from (-0.1)-(+0.1).
대표청구항▼
What is claimed is: 1. A material that can be used for magnetic refrigeration, wherein the material substantially has the general formula (Ay B1-y)2+δ(C1-xDx) wherein A is selected from Mn and Co: B is selected from Fe and Cr; C and D are different and are selected from P, As, B, Se, Ge, Si
What is claimed is: 1. A material that can be used for magnetic refrigeration, wherein the material substantially has the general formula (Ay B1-y)2+δ(C1-xDx) wherein A is selected from Mn and Co: B is selected from Fe and Cr; C and D are different and are selected from P, As, B, Se, Ge, Si and Sb; x is a number in the range of greater the 0 and less than 1; y is a number in the range 0-1; and δ is a number from (-0.1)-(+0.1). 2. A material according to claim 1, wherein at least 90% of A is Mn; at least 90% of B is Fe; at least 90% of C is P; and at least 90% of D is As or Sb. 3. A material according to claim 2, wherein the material has the general formula MnFe(P1-xAsx). 4. A material according to claim 2, wherein the material has the general formula MnFe(P1-xSbx). 5. A material according to claim 1, wherein x is a number in the range from 0.3-0.6. 6. A material according to claim 1, wherein the material substantially has the general formula MnFeP0.45As0.55. 7. A material according to claim 1, wherein if D is As, and As is partly replaced with Si and/or Ge. 8. A material according to claim 7, wherein 1-40% of the As is replaced with Si and/or Ge. 9. A method for the manufacture of the material according to claim 3, wherein powders of iron arsenide (FeAs2) or iron antimony (FeSb2); manganese phosphide (Mn3P2); iron (Fe); and Manganese (Mn) are mixed in suitable quantities to produce a powder mixture that complies with the general formula MnFe(P1-x Asx) or MnFe(P1-xSbx) and the powder mixture is subsequently molten under an inert atmosphere and annealed. 10. A method for the manufacture of the material according to claim 1, wherein the same comprises mixing powders of the compounds Fe 2P, MnAs2, Mn and P in suitable weight proportions, grinding the powders to produce a powder mixture complying with the general formula MnFe(P1-xDx), melting the powder mixture in an inert atmosphere, and annealing the resulting alloy. 11. A method according to claim 10, wherein the powder mixture is sintered at a temperature of approximately 1000째 C. and the resulting alloy is heated at a temperature of approximately 650째 C. 12. A method according to claim 10, wherein the sintering step takes at least approximately one hour and the annealing step takes at least approximately 24 hours. 13. A method according to claim 10, wherein the starting materials are mixed in quantities so as to provide a composition having the formula MnFeP0.45As0.55. 14. A method according to claim 10, wherein prior to melting the powder mixture is compressed to a pill. 15. A method according to claim 10, wherein the inert atmosphere is an argon atmosphere. 16. A method according to claim 10, wherein the molten powder mixture is annealed at a temperature in the 750-950째 C. range. 17. A method of using the material according to claim 1 comprising employing the material in magnetic refrigeration in the 250-320째 K range. 18. A material according to claim 2, wherein at least 95% of A is Mn. 19. A material according to claim 2, wherein at least 95% of B is Fe. 20. A material according to claim 2, wherein at 95% of C is P. 21. A material according to claim 1, wherein at least 95% of D is As or Sb. 22. A material according to claim 8, wherein 10-30% of the As is replaced with Si and/or Ge. 23. A material according to claim 22, wherein 17-23% of the As is replaced with Si and/or Ge. 24. A material according to claim 23, wherein approximately 20% of the As is replaced with Si and/or Ge. 25. A method according to claim 10, wherein D comprises As and Si and/or Ge. 26. A method according to claim 13, wherein the starting materials are mixed in quantities so as to provide a composition having the formula MnFeP0.45As9.45(Si/Ge)0.10.
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이 특허에 인용된 특허 (2)
Ziolo Ronald F. (Webster NY) Kroll Elizabeth C. (Hamilton CAX) Palacios Javier Tejada (Barcelona ESX) Zhang Xixiang (Barcelona ESX), Magnetic refrigerant compositions and processes for making and using.
Brück, Ekkehard Hubertus; Tegusi, Ojiyed; De Boer, Frank Roelof, Magnetic material with cooling capacity, a method for the manufacturing thereof and use of such material.
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