WO2012124721A1 - 磁気冷凍材料 - Google Patents
磁気冷凍材料 Download PDFInfo
- Publication number
- WO2012124721A1 WO2012124721A1 PCT/JP2012/056507 JP2012056507W WO2012124721A1 WO 2012124721 A1 WO2012124721 A1 WO 2012124721A1 JP 2012056507 W JP2012056507 W JP 2012056507W WO 2012124721 A1 WO2012124721 A1 WO 2012124721A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetic
- magnetic refrigeration
- refrigeration material
- tesla
- magnetic field
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/012—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials adapted for magnetic entropy change by magnetocaloric effect, e.g. used as magnetic refrigerating material
- H01F1/015—Metals or alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
Definitions
- the present invention relates to a magnetic refrigeration material suitably used for home appliances such as a freezer and a refrigerator, an air conditioner for automobiles, and the like, and a magnetic refrigeration device using the same.
- a magnetic refrigeration system has been proposed in place of the conventional gas refrigeration system that uses a chlorofluorocarbon-based gas that causes environmental problems such as global warming.
- this magnetic refrigeration system when the magnetic refrigeration material is a refrigerant and the magnetic order of the magnetic material is changed by the magnetic field in the adiabatic state and the magnetic entropy change that occurs when the magnetic order of the magnetic material is changed by the magnetic field in the isothermal state. Use the adiabatic temperature change that occurs. Therefore, according to this magnetic refrigeration system, refrigeration can be performed without using chlorofluorocarbon gas, and there is an advantage that the refrigeration efficiency is higher than that of the conventional gas refrigeration system.
- Gd-based materials such as Gd (gadolinium) and / or Gd-based compounds are known. These Gd-based materials are known as materials having a wide operating temperature range, but have a drawback that the amount of change in magnetic entropy ( ⁇ S M ) is small. Gd is a rare and expensive metal among rare earth elements, and it is difficult to say that it is an industrially practical material.
- Non-Patent Document 1 discusses various substitution elements including cobalt (Co) substitution, and Patent Document 1 discloses that a part of La is substituted with Ce. and La 1-z Ce z (Fe x Si 1-x) 13 H y by absorbing hydrogen, devised a high temperature the Curie temperature has been proposed.
- Patent Document 2 proposes a device for expanding the operating temperature range by adjusting the ratio of Co, Fe, and Si in La (Fe 1-xy CoySix) 13 .
- Patent Document 3 discloses a method of solidifying by a roll quenching method
- Patent Document 4 discloses a method of conducting heating and sintering while applying pressure treatment
- Patent Document 5 A method of reacting an Fe—Si alloy with oxidized La has been proposed.
- the LaFeSi materials reported in Non-Patent Document 1 and Patent Document 1 increase the Curie temperature while maintaining the maximum value ( ⁇ S max ) of the magnetic entropy change amount ( ⁇ S M ). Since the operating temperature range of the magnetic refrigeration material is narrower than that, it is necessary to configure the magnetic refrigeration system with a plurality of types of materials having different operating temperature ranges, and there is a problem that handling is difficult. In general, since the LaFeSi-based material has a Curie temperature of around 200K, there is a problem in that it cannot be used as a magnetic refrigeration material for the room temperature region. In Patent Document 2, relative cooling power (hereinafter abbreviated as RCP) is presented as an index indicating magnetic refrigeration performance.
- RCP relative cooling power
- An object of the present invention is to provide a magnetic refrigeration material that has a Curie temperature of about room temperature or higher and a magnetic field change by a permanent magnet up to about 2 Tesla, which greatly exceeds the conventional refrigeration performance. is there.
- Another object of the present invention is to provide a magnetic refrigeration material that not only has a large amount of magnetic entropy change ( ⁇ S M ) but also has a wide operating temperature range, that is, a large RCP.
- the formula La 1-f RE f (Fe 1-abcde Si a Co b X c Y d Z e ) 13 (Wherein RE is at least one element selected from the group consisting of rare earth elements including Sc and Y, excluding La, X is at least one element of Ga and Al, and Y is Ge, Sn, B and C) At least one element selected from the group, Z represents at least one element selected from the group consisting of Ti, V, Cr, Mn, Ni, Cu, Zn, and Zr, and a represents 0.03 ⁇ a ⁇ 0.
- the Curie temperature is 220 K or more and 276 K or less
- a magnetic refrigeration material having max ) of 5 J / kgK or more is provided.
- the magnetic refrigeration device using the said magnetic refrigeration material and also a magnetic refrigeration system are provided.
- the magnetic refrigeration having a Curie temperature of 220 K or more and 276 K or less and a maximum value ( ⁇ S max ) of a magnetic entropy change amount ( ⁇ S M ) in a magnetic field change up to 2 Tesla is 5 J / kgK or more.
- the magnetic refrigeration material of the present invention has a Curie temperature of about room temperature or higher and a large amount of magnetic entropy change ( ⁇ S M ) as well as a wide operating temperature range. More magnetic refrigeration materials can be provided. Furthermore, by using the magnetic refrigeration material of the present invention, a magnetic refrigeration system can be configured with fewer types of materials than before. By selecting magnetic refrigeration materials having different Curie temperatures, it is possible to configure magnetic refrigeration devices according to different applications such as home air conditioners and industrial refrigerator-freezers.
- Magnetic refrigeration material of the present invention an alloy composition represented by the formula La 1-f RE f (Fe 1-abcde Si a Co b X c Y d Z e) 13.
- RE is at least one element selected from the group consisting of rare earth elements including Sc and Y (yttrium), excluding La
- X is at least one element of Ga and Al
- Y is Ge, Sn, B and At least one element selected from the group consisting of C
- Z represents at least one element selected from the group consisting of Ti, V, Cr, Mn, Ni, Cu, Zn and Zr.
- a is 0.03 ⁇ a ⁇ 0.17
- b is 0.003 ⁇ b ⁇ 0.06
- c is 0.02 ⁇ c ⁇ 0.10
- d is 0 ⁇ d ⁇ 0.04
- e is 0 ⁇ e ⁇ 0.04
- f is 0 ⁇ f ⁇ 0.50.
- a part of La in the alloy can be replaced with the RE.
- f represents the content of the element RE substituting part of La.
- f is 0 ⁇ f ⁇ 0.50.
- La and RE elements can adjust the Curie temperature, the operating temperature range, and the RCP. However, when f is larger than 0.50, the magnetic entropy change amount ( ⁇ S M ) decreases.
- a represents the content of Si element. a is 0.03 ⁇ a ⁇ 0.17.
- Si can adjust the Curie temperature, the operating temperature range, and the RCP. Furthermore, there are effects such as adjusting the melting point of the compound and increasing the mechanical strength. When a is smaller than 0.03, the Curie temperature decreases. On the other hand, when a is larger than 0.17, the magnetic entropy change amount ( ⁇ S M ) decreases.
- b represents the content of Co element.
- b is 0.003 ⁇ b ⁇ 0.06.
- Co is an element effective in adjusting the Curie temperature and the amount of change in magnetic entropy ( ⁇ S M ).
- ⁇ S M the magnetic entropy change amount
- b is more than 0.06, the half width of the temperature curve in the magnetic entropy change amount ( ⁇ S M ) measured and calculated in the magnetic field change up to 2 Tesla becomes narrow.
- c represents the content of the X element. c is 0.02 ⁇ c ⁇ 0.10. X is an element that is effective in adjusting the operating temperature range.
- c is smaller than 0.02, the half-value width of the temperature curve in the magnetic entropy change amount ( ⁇ S M ) measured and calculated in the magnetic field change up to 2 Tesla becomes narrow.
- ⁇ S M the magnetic entropy change amount
- d represents the content of the Y element. d is 0 ⁇ d ⁇ 0.04. Y can adjust the Curie temperature, the operating temperature range, and even the RCP. Furthermore, there are effects such as adjusting the melting point of the alloy and increasing the mechanical strength. If d is greater than 0.04, the magnetic entropy change ( ⁇ S M ) decreases, or the half-value width of the temperature curve for the measured and calculated magnetic entropy change ( ⁇ S M ) in a magnetic field change up to 2 Tesla is narrow. Become.
- e represents the content of the Z element. e is 0 ⁇ e ⁇ 0.04. Z can suppress the precipitation of ⁇ -Fe, control the Curie temperature, and improve the durability of the powder. However, if it is out of the predetermined range, a compound phase having a desired amount of NaZn 13 type crystal structure phase cannot be obtained, and the magnetic entropy change amount ( ⁇ S M ) decreases. When e is larger than 0.04, the magnetic entropy change ( ⁇ S M ) decreases, or the half-value width of the temperature curve in the magnetic entropy change ( ⁇ S M ) measured and calculated in the magnetic field change up to 2 Tesla is narrow. Become.
- 1-abccde represents the Fe content.
- 1-abbcde is preferably 0.75 ⁇ 1-abbcde ⁇ 0.95.
- Fe affects the generation efficiency of a compound phase having a NaZn 13 type crystal structure phase.
- the alloy represented by the above formula preferably has a small content of oxygen, nitrogen and inevitable impurities in the raw material, but may be contained in a trace amount.
- the method for producing the magnetic refrigeration material of the present invention is not particularly limited, and is performed by a known method.
- a die casting method, an arc melting method, a roll quenching method, and an atomizing method can be mentioned.
- a method for producing the material in a die casting method or an arc melting method, first, raw materials blended so as to have a predetermined composition are prepared. Next, the raw materials blended are heated and dissolved in an inert gas atmosphere to form a melt, and then the melt is poured into a water-cooled copper mold, cooled and solidified to obtain an ingot.
- the alloy melt is poured into a copper water-cooled roll, and then rapidly cooled. -Solidify to obtain an alloy slab.
- the alloy obtained by cooling and solidification may be heat-treated for homogenization.
- the conditions for the heat treatment are preferably 600 ° C. or more and 1,250 ° C. or less in an inert atmosphere.
- the heat treatment time is usually from 10 minutes to 100 hours, preferably from 10 minutes to 30 hours.
- the abundance ratio of the compound phase having the NaZn 13- type crystal structure phase does not reach a predetermined amount, the proportion of ⁇ -Fe phase in the alloy increases, and the magnetic entropy change amount ( ⁇ S M ) may decrease.
- the heat-treated alloy has an ingot shape, a flake shape, and a spherical shape, and has an average particle size of 0.1 ⁇ m to 2.0 mm. Grind as necessary. These powders can be used as magnetic refrigeration materials as they are or after being processed into a sintered body.
- the above particle size it can be pulverized using mechanical means such as a jaw crusher, a disk mill, an attritor and a jet mill.
- mechanical means such as a jaw crusher, a disk mill, an attritor and a jet mill.
- pulverization using a mortar or the like it is not particularly limited to these means.
- the conditions for producing the sintered body include, for example, conditions of 1,000 ° C. to 1,350 ° C. and 10 minutes to 50 hours in a vacuum or an inert atmosphere.
- the magnetic entropy change amount ( ⁇ S M ) and its half-value width are measured using a SQUID magnetometer (trade name MPMS-7, manufactured by Quantum Design).
- the amount of magnetic entropy change (- ⁇ S M ) is obtained by measuring the magnetization under a constant magnetic field up to 2 Tesla in a specific temperature range and using the Maxwell relational expression shown below from the magnetization-temperature curve. Can do.
- M magnetization
- T temperature
- H an applied magnetic field
- the RCP indicating the magnetic refrigeration capacity can be calculated from the following equation.
- RCP - ⁇ S max ⁇ ⁇ T
- - ⁇ S max represents the maximum value of - ⁇ S M
- ⁇ T denotes a half-value width of the peak of - ⁇ S M.
- the magnetic refrigeration material of the present invention is a temperature that exhibits a maximum value ( ⁇ S max ) of the amount of change in magnetic entropy ( ⁇ S M ) as compared with a magnetic refrigeration material of a conventional NaZn 13 type La (FeSi) 13 series compound. Curie temperature is high.
- the magnetic refrigeration material of the present invention can be used in a wide temperature range of 220K to 276K, or 220K to 250K. Furthermore, since the half-value width of the temperature curve in the magnetic entropy change ( ⁇ S M ) measured and calculated for magnetic field changes up to 2 Tesla is wide, it is possible to configure a magnetic refrigeration system with less material than conventional materials. is there.
- the maximum value ( ⁇ S max ) of the magnetic entropy change amount ( ⁇ S M ) (J / kgK) in the magnetic field change up to 2 Tesla of the magnetic refrigeration material of the present invention is 5 J / kgK or more, preferably 5 to 7.1 J / KgK.
- the maximum value ( ⁇ S max ) of the magnetic entropy change amount ( ⁇ S M ) is lower than 5 J / kgK, the magnetic refrigeration performance is insufficient and the efficiency of the magnetic refrigeration decreases.
- the full width at half maximum (K) of the magnetic entropy change amount ( ⁇ S M ) measured and calculated in the magnetic field change of the magnetic refrigeration material of the present invention up to 2 Tesla is 40K or more.
- the half-value width is 40K or more, the operating temperature range is widened.
- the half-value width is 40K or less, the operating temperature range becomes narrow and difficult to handle, which is not preferable.
- the RCP (J / kg) indicating the magnetic refrigeration capacity in the magnetic field change up to 2 Tesla of the magnetic refrigeration material of the present invention is 200 J / kg or more, preferably 200 to 362 J / kg.
- the RCP is low, there is a possibility that the refrigeration capacity of the magnetic refrigeration material is lacking.
- the magnetic refrigeration device of the present invention and the magnetic refrigeration system use the magnetic refrigeration material of the present invention.
- the magnetic refrigeration material of the present invention can be processed into various shapes. Examples include a shape machined into a strip shape, a powder shape, and a shape obtained by sintering powder.
- the magnetic refrigeration device and the magnetic refrigeration system are not particularly limited depending on the type. For example, a heat exchange medium introduction pipe is provided at one end of the magnetic refrigeration work chamber and a heat is provided at the other end so that the heat exchange medium flows through the surface of the magnetic refrigeration material of the present invention disposed in the magnetic refrigeration work chamber.
- An exchange medium discharge pipe is provided, a permanent magnet is disposed in the vicinity of the magnetic refrigeration chamber, and a drive device is provided for applying and removing a magnetic field by changing the relative position of the permanent magnet with respect to the magnetic refrigeration material of the present invention. Those are preferred.
- the main action of the preferred magnetic refrigeration device or system is that, for example, when the drive unit is operated to change the relative position between the magnetic refrigeration chamber and the permanent magnet, a magnetic field is applied to the magnetic refrigeration material of the present invention.
- the entropy moves from the crystal lattice to the electron spin, and the entropy of the electron spin system increases.
- the temperature of the magnetic refrigeration material of the present invention is lowered and transmitted to the heat exchange medium, and the temperature of the heat exchange medium is lowered.
- the heat exchange medium whose temperature has been lowered in this manner is discharged from the magnetic refrigeration chamber through the discharge pipe and can supply the refrigerant to the external low-temperature consumption facility.
- Example 1 The raw materials were weighed so as to have the composition shown in Table 1, and then melted in an argon gas atmosphere in a high-frequency melting furnace to obtain an alloy melt. Subsequently, this alloy melt was poured into a copper mold to obtain an alloy having a thickness of 10 mm. Thereafter, the obtained alloy was heat-treated at 1,150 ° C. for 20 hours in an argon gas atmosphere, and then pulverized with a mortar. An alloy powder was obtained by collecting and classifying the pulverized powder with a sieve of 18 mesh to 30 mesh.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
この磁気冷凍方式では、磁気冷凍材料を冷媒とし、等温状態で磁性材料の磁気秩序を磁場で変化させた際に生じる磁気エントロピー変化および断熱状態で磁性材料の磁気秩序を磁場で変化させた際に生じる断熱温度変化を利用する。したがって、この磁気冷凍方式によれば、フロンガスを使用せずに冷凍を行なうことができ、従来の気体冷凍方式に比べて冷凍効率が高いという利点がある。
更に、これらの材料を製造するための手段として、例えば、特許文献3では、ロール急冷法により凝固させる方法、特許文献4では、加圧処理しつつ通電加熱焼結する方法および特許文献5では、Fe-Si合金と酸化Laとを反応させる方法が提案されている。
また特許文献2には、磁気冷凍性能を示す指標として相対冷却力(Relative Cooling Power,以下RCPと略す)が提示されている。この指標で判断すると、これらに記載されている磁気冷凍材料では、磁気エントロピー変化量(-ΔSM)の最大値(-ΔSmax)は大きいが動作温度範囲が狭い、もしくは動作温度範囲が広くなったが磁気エントロピー変化量(-ΔSM)の最大値(-ΔSmax)が減少方向にあるため、RCPはGd系材料とほぼ同等であり、性能を大きく上回る磁気冷凍材料とは言い難い。
本発明の課題は、キュリー温度が室温付近もしくはそれ以上であり、かつ永久磁石による磁場変化が可能と考えられる2テスラ付近までで、従来の冷凍性能を大幅に超える磁気冷凍材料を提供することにある。
本発明の別の課題は、磁気エントロピー変化量(-ΔSM)が大きいだけでなく動作温度範囲も広い、即ち、RCPが大きい磁気冷凍材料を提供することにある。
(式中REはLaを除く、Sc及びY含む希土類元素からなる群より選ばれる少なくとも1種の元素、XはGa及びAlの少なくとも1種の元素、YはGe、Sn、B及びCからなる群より選ばれる少なくとも1種の元素、ZはTi、V、Cr、Mn、Ni、Cu、Zn及びZrからなる群より選ばれる少なくとも1種の元素を示す。aは0.03≦a≦0.17、bは0.003≦b≦0.06、cは0.02≦c≦0.10、dは0≦d≦0.04、eは0≦e≦0.04、fは0≦f≦0.50である。)で表される組成からなり、キュリー温度が220K以上276K以下で、かつ2テスラまでの磁場変化における磁気エントロピー変化量(-ΔSM)の最大値(-ΔSmax)が5J/kgK以上である磁気冷凍材料が提供される。
また、本発明によれば、前記磁気冷凍材料を用いた磁気冷凍デバイス、さらには磁気冷凍システムが提供される。
更に本発明によれば、キュリー温度が220K以上276K以下で、かつ2テスラまでの磁場変化における磁気エントロピー変化量(-ΔSM)の最大値(-ΔSmax)が5J/kgK以上である磁気冷凍材料を製造するための、上記式で表される組成の合金の使用が提供される。
本発明の磁気冷凍材料は、式La1-fREf(Fe1-a-b-c-d-eSiaCobXcYdZe)13で表される組成の合金を用いる。
式中REはLaを除く、Sc及びY(イットリウム)を含む希土類元素からなる群より選ばれる少なくとも1種の元素、XはGa及びAlの少なくとも1種の元素、YはGe、Sn、B及びCからなる群より選ばれる少なくとも1種の元素、ZはTi、V、Cr、Mn、Ni、Cu、Zn及びZrからなる群より選ばれる少なくとも1種の元素を示す。aは0.03≦a≦0.17、bは0.003≦b≦0.06、cは0.02≦c≦0.10、dは0≦d≦0.04、eは0≦e≦0.04、fは0≦f≦0.50である。
1,250℃を超える温度で熱処理を行うと、合金表面の希土類成分が蒸発して不足し、NaZn13型結晶構造相を有する化合物相の分解が起こる恐れがある。また600℃未満で熱処理を行うと、NaZn13型結晶構造相を有する化合物相の存在比率が所定量に達せず、合金中にα-Fe相の割合が増加し、磁気エントロピー変化量(-ΔSM)が低下する恐れがある。
RCP=-ΔSmax×δT
但し、-ΔSmaxは-ΔSMの最大値を示し、δTは-ΔSMのピークの半値幅を示す。
本発明の磁気冷凍材料は、220K~276K、もしくは220K~250Kという広い温度範囲において使用することが可能である。さらに2テスラまでの磁場変化において測定・算出された磁気エントロピー変化量(-ΔSM)における温度曲線の半値幅が広いため、従来の材料よりも少ない材料で磁気冷凍システムを構成することが可能である。
実施例1
表1に示した組成となるように原料を秤量した後、高周波溶解炉にてアルゴンガス雰囲気中で溶解し、合金溶融物とした。続いて、この合金溶融物を、銅製金型に注湯して厚み10mmの合金を得た。その後、得られた合金をアルゴンガス雰囲気中において1,150℃、20時間で熱処理を行ない、その後乳鉢により粉砕を行った。粉砕した粉末を18メッシュ~30メッシュのふるい間で得られる粉末を採取して分級することにより合金粉末を得た。これを用いて、磁気エントロピー変化量(-ΔSM)および最大値(-ΔSmax)と2テスラまでの磁場変化において測定・算出された磁気エントロピー変化量(-ΔSM)における温度曲線の半値幅に基づき、RCPを上述の方法により評価した。結果を表2に示す。
表1に示す組成に変更した以外は、実施例1と同様にして磁気冷凍材料を作製した。得られた磁気冷凍材料の合金粉末について、実施例1と同様に評価した。結果を表2に示す。
Claims (5)
- 式La1-fREf(Fe1-a-b-c-d-eSiaCobXcYdZe)13
(式中REはLaを除く、Sc及びYを含む希土類元素からなる群より選ばれる少なくとも1種の元素、XはGa及びAlの少なくとも1種の元素、YはGe、Sn、B及びCからなる群より選ばれる少なくとも1種の元素、ZはTi、V、Cr、Mn、Ni、Cu、Zn及びZrからなる群より選ばれる少なくとも1種の元素を示す。aは0.03≦a≦0.17、bは0.003≦b≦0.06、cは0.02≦c≦0.10、dは0≦d≦0.04、eは0≦e≦0.04、fは0≦f≦0.50である。)で表される組成からなり、キュリー温度が220K以上276K以下で、かつ2テスラまでの磁場変化における磁気エントロピー変化量(-ΔSM)の最大値(-ΔSmax)が5J/kgK以上である磁気冷凍材料。 - 2テスラまでの磁場変化において測定・算出された磁気エントロピー変化量(-ΔSM)における温度曲線の半値幅(K)が、40K以上である請求項1の磁気冷凍材料。
- 2テスラまでの磁場変化における磁気冷凍能力を示す相対冷却力が200J/kg以上である請求項1又は2の磁気冷凍材料。
- キュリー温度が220K以上250K以下である請求項1~3のいずれかの磁気冷凍材料。
- 請求項1~4のいずれかの磁気冷凍材料を用いた磁気冷凍デバイス。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/005,081 US9633769B2 (en) | 2011-03-16 | 2012-03-14 | Magnetic refrigeration material |
KR1020137026830A KR101915242B1 (ko) | 2011-03-16 | 2012-03-14 | 자기 냉동 재료 |
EP12756965.5A EP2687618B1 (en) | 2011-03-16 | 2012-03-14 | Magnetic refrigeration material |
JP2013504750A JP5809689B2 (ja) | 2011-03-16 | 2012-03-14 | 磁気冷凍材料 |
CN201280020968.XA CN103502497B (zh) | 2011-03-16 | 2012-03-14 | 磁制冷材料 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-084036 | 2011-03-16 | ||
JP2011084036 | 2011-03-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012124721A1 true WO2012124721A1 (ja) | 2012-09-20 |
Family
ID=46830786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/056507 WO2012124721A1 (ja) | 2011-03-16 | 2012-03-14 | 磁気冷凍材料 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9633769B2 (ja) |
EP (1) | EP2687618B1 (ja) |
JP (1) | JP5809689B2 (ja) |
KR (1) | KR101915242B1 (ja) |
CN (1) | CN103502497B (ja) |
WO (1) | WO2012124721A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106086738B (zh) * | 2016-05-31 | 2018-04-13 | 北京科技大学 | 调节NaZn13结构稀土铁硅合金居里温度及降低杂相的方法 |
CN107523740B (zh) * | 2017-09-20 | 2020-05-05 | 湘潭大学 | CuCrFeNiTi高熵合金材料及其制备方法 |
CN109378148B (zh) * | 2018-07-25 | 2020-12-15 | 中国科学院宁波材料技术与工程研究所 | 一种镧铁硅基磁制冷材料及其制备方法 |
CN109266951B (zh) * | 2018-09-25 | 2020-05-22 | 北京航空航天大学 | 一种LaFeSiCu磁制冷合金及其制备方法 |
CN109182866B (zh) * | 2018-09-25 | 2019-09-06 | 燕山大学 | 高熵合金-金刚石复合材料及其制备方法 |
KR102665067B1 (ko) | 2020-01-28 | 2024-05-13 | 현대자동차주식회사 | Al을 포함하는 Mn계 자기열량 물질 |
JP2021148319A (ja) * | 2020-03-16 | 2021-09-27 | パナソニックIpマネジメント株式会社 | 磁気冷却デバイス |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004100043A (ja) * | 2002-08-21 | 2004-04-02 | Sumitomo Special Metals Co Ltd | 磁性合金材料およびその製造方法 |
JP2005200749A (ja) | 2004-01-19 | 2005-07-28 | Hitachi Metals Ltd | 磁性薄片およびその製造方法 |
JP2006089839A (ja) | 2004-09-27 | 2006-04-06 | Tohoku Univ | 磁気冷凍作業物質ならびに磁気冷凍方式 |
JP2006274345A (ja) | 2005-03-29 | 2006-10-12 | Hitachi Metals Ltd | 磁性合金粉末およびその製造方法 |
JP2006307332A (ja) * | 2005-04-01 | 2006-11-09 | Neomax Co Ltd | 磁性合金材料およびその製造方法 |
JP2006316324A (ja) | 2005-05-13 | 2006-11-24 | Toshiba Corp | 磁性材料の製造方法 |
JP2009221494A (ja) | 2008-03-13 | 2009-10-01 | Chubu Electric Power Co Inc | 磁気冷凍材料 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1025125C (zh) | 1992-05-07 | 1994-06-22 | 冶金工业部钢铁研究总院 | 铁-稀土基磁致冷材料及制备方法 |
US7186303B2 (en) * | 2002-08-21 | 2007-03-06 | Neomax Co., Ltd. | Magnetic alloy material and method of making the magnetic alloy material |
JP4413804B2 (ja) | 2005-03-24 | 2010-02-10 | 株式会社東芝 | 磁気冷凍材料及びその製造方法 |
GB2424901B (en) | 2005-04-01 | 2011-11-09 | Neomax Co Ltd | Method of making a sintered body of a magnetic alloyl |
JP2009068077A (ja) | 2007-09-13 | 2009-04-02 | Tohoku Univ | 合金材料、磁性材料、磁性材料の製造方法およびその製造方法により製造した磁性材料 |
JP2009249702A (ja) | 2008-04-08 | 2009-10-29 | Hitachi Metals Ltd | 磁性合金粉末およびその製造方法 |
CN101477864B (zh) | 2008-10-15 | 2011-11-23 | 瑞科稀土冶金及功能材料国家工程研究中心有限公司 | 具有大磁热效应的稀土磁制冷材料及其制备工艺 |
-
2012
- 2012-03-14 JP JP2013504750A patent/JP5809689B2/ja active Active
- 2012-03-14 CN CN201280020968.XA patent/CN103502497B/zh active Active
- 2012-03-14 EP EP12756965.5A patent/EP2687618B1/en active Active
- 2012-03-14 WO PCT/JP2012/056507 patent/WO2012124721A1/ja active Application Filing
- 2012-03-14 US US14/005,081 patent/US9633769B2/en active Active
- 2012-03-14 KR KR1020137026830A patent/KR101915242B1/ko active IP Right Grant
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004100043A (ja) * | 2002-08-21 | 2004-04-02 | Sumitomo Special Metals Co Ltd | 磁性合金材料およびその製造方法 |
JP2005200749A (ja) | 2004-01-19 | 2005-07-28 | Hitachi Metals Ltd | 磁性薄片およびその製造方法 |
JP2006089839A (ja) | 2004-09-27 | 2006-04-06 | Tohoku Univ | 磁気冷凍作業物質ならびに磁気冷凍方式 |
JP2006274345A (ja) | 2005-03-29 | 2006-10-12 | Hitachi Metals Ltd | 磁性合金粉末およびその製造方法 |
JP2006307332A (ja) * | 2005-04-01 | 2006-11-09 | Neomax Co Ltd | 磁性合金材料およびその製造方法 |
JP2006316324A (ja) | 2005-05-13 | 2006-11-24 | Toshiba Corp | 磁性材料の製造方法 |
JP2009221494A (ja) | 2008-03-13 | 2009-10-01 | Chubu Electric Power Co Inc | 磁気冷凍材料 |
Non-Patent Citations (3)
Title |
---|
"Jiki Reito Gijutsu no Jo-on-iki heno Tenkai", MAGUNE, vol. 1, no. 7, 2006 |
E. C. PASSAMANI ET AL.: "Magnetic and magnetocaloric properties of La (Fe, CO) SP1.6 compounds (SP=Al or Si)", JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, vol. 312, no. 1, 2007, pages 65 - 71, XP005925289 * |
JUN SHEN ET AL.: "Magnetic properties and magnetic entropy changes of LaFe11.0CO0.8 (Si1-x A1x)1.2 compounds", JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, vol. 310, no. 2, 2007, pages 2823 - 2825, XP005920313 * |
Also Published As
Publication number | Publication date |
---|---|
CN103502497B (zh) | 2015-12-09 |
EP2687618A1 (en) | 2014-01-22 |
EP2687618A4 (en) | 2014-11-05 |
CN103502497A (zh) | 2014-01-08 |
KR20140026403A (ko) | 2014-03-05 |
JPWO2012124721A1 (ja) | 2014-07-24 |
US20140007593A1 (en) | 2014-01-09 |
KR101915242B1 (ko) | 2018-11-06 |
US9633769B2 (en) | 2017-04-25 |
EP2687618B1 (en) | 2017-10-11 |
JP5809689B2 (ja) | 2015-11-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5809689B2 (ja) | 磁気冷凍材料 | |
TWI402359B (zh) | 具有優良磁卡路里性質的Fe-Si-La合金 | |
US8424314B2 (en) | Intermetallic compounds, their use and a process for preparing the same | |
JP5158485B2 (ja) | 磁性合金及びその製造方法 | |
US11225703B2 (en) | Magnetocaloric alloys useful for magnetic refrigeration applications | |
EP3031056B1 (en) | Magnetocaloric materials containing b | |
JP6632602B2 (ja) | 磁気冷凍モジュールの製造方法 | |
WO2008122535A1 (en) | New intermetallic compounds, their use and a process for preparing the same | |
US20160189833A1 (en) | Magnetocaloric materials containing b | |
WO2013060267A1 (zh) | 小滞后损耗的一级相变La(Fe,Si)13基磁热效应材料及其制备方法和用途 | |
Lu et al. | On the microstructural evolution and accelerated magnetocaloric phase formation in La-Fe-Si alloys by hot forging deformation | |
JP6055407B2 (ja) | 磁気冷凍材料及び磁気冷凍デバイス | |
JP5850318B2 (ja) | 磁気冷凍材料、磁気冷凍デバイスおよび磁気冷凍システム | |
CN104313513A (zh) | 具有磁热效应的铁基非晶合金、其应用以及调控其磁转变温度的方法 | |
KR102589531B1 (ko) | 자기열량합금 및 이의 제조방법 | |
Kumar et al. | Magnetic and magnetocaloric effect in melt spun La1− xRxFe13− yAlyCz (R= Pr and Nd) compounds | |
CN117702011A (zh) | 一种高磁热效应的大块稀土基高熵非晶合金及其制备方法 | |
EP2137742A1 (en) | New intermetallic compounds, their use and a process for preparing the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12756965 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2013504750 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14005081 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20137026830 Country of ref document: KR Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2012756965 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012756965 Country of ref document: EP |