WO2004086523A9 - n型熱電特性を有する複合酸化物 - Google Patents
n型熱電特性を有する複合酸化物Info
- Publication number
- WO2004086523A9 WO2004086523A9 PCT/JP2004/004034 JP2004004034W WO2004086523A9 WO 2004086523 A9 WO2004086523 A9 WO 2004086523A9 JP 2004004034 W JP2004004034 W JP 2004004034W WO 2004086523 A9 WO2004086523 A9 WO 2004086523A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- composite oxide
- thermoelectric conversion
- temperature
- type thermoelectric
- general formula
- Prior art date
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 85
- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 35
- 229910052747 lanthanoid Inorganic materials 0.000 claims abstract description 13
- 150000002602 lanthanoids Chemical class 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 13
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 11
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 11
- 229910052745 lead Inorganic materials 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 9
- 229910052788 barium Inorganic materials 0.000 claims abstract description 8
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 8
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 6
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 5
- 238000010248 power generation Methods 0.000 claims description 16
- -1 L i Inorganic materials 0.000 claims description 7
- 229910052789 astatine Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- 238000010304 firing Methods 0.000 description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052779 Neodymium Inorganic materials 0.000 description 5
- 229910052692 Dysprosium Inorganic materials 0.000 description 4
- 229910052691 Erbium Inorganic materials 0.000 description 4
- 229910052693 Europium Inorganic materials 0.000 description 4
- 229910052688 Gadolinium Inorganic materials 0.000 description 4
- 229910052689 Holmium Inorganic materials 0.000 description 4
- 229910052777 Praseodymium Inorganic materials 0.000 description 4
- 229910052772 Samarium Inorganic materials 0.000 description 4
- 229910052771 Terbium Inorganic materials 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052765 Lutetium Inorganic materials 0.000 description 2
- 229910052775 Thulium Inorganic materials 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- WTFUTSCZYYCBAY-SXBRIOAWSA-N 6-[(E)-C-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-N-hydroxycarbonimidoyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C/C(=N/O)/C1=CC2=C(NC(O2)=O)C=C1 WTFUTSCZYYCBAY-SXBRIOAWSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000005678 Seebeck effect Effects 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229940096118 ella Drugs 0.000 description 1
- OAGKEKIEPNLLIS-UHFFFAOYSA-N ethanolate neodymium(3+) Chemical compound [Nd+3].CC[O-].CC[O-].CC[O-] OAGKEKIEPNLLIS-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229930182478 glucoside Natural products 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 231100001231 less toxic Toxicity 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- CBNHBSGOXOSEAO-UHFFFAOYSA-N methanolate neodymium(3+) Chemical compound [Nd+3].[O-]C.[O-]C.[O-]C CBNHBSGOXOSEAO-UHFFFAOYSA-N 0.000 description 1
- VWHIRQNZEXUKAZ-UHFFFAOYSA-N methanolate;nickel(2+) Chemical compound CO[Ni]OC VWHIRQNZEXUKAZ-UHFFFAOYSA-N 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- TVPFVDUBVQKLJR-UHFFFAOYSA-N nickel(2+);propan-1-olate Chemical compound CCCO[Ni]OCCC TVPFVDUBVQKLJR-UHFFFAOYSA-N 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- OOLLAFOLCSJHRE-ZHAKMVSLSA-N ulipristal acetate Chemical compound C1=CC(N(C)C)=CC=C1[C@@H]1C2=C3CCC(=O)C=C3CC[C@H]2[C@H](CC[C@]2(OC(C)=O)C(C)=O)[C@]2(C)C1 OOLLAFOLCSJHRE-ZHAKMVSLSA-N 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/006—Compounds containing, besides nickel, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/04—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Nickelates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Nickelates
- C01G53/42—Nickelates containing alkali metals, e.g. LiNiO2
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Nickelates
- C01G53/66—Nickelates containing alkaline earth metals, e.g. SrNiO3, SrNiO2
- C01G53/68—Nickelates containing alkaline earth metals, e.g. SrNiO3, SrNiO2 containing rare earth, e.g. La1.62 Sr0.38NiO4
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Nickelates
- C01G53/70—Nickelates containing rare earth, e.g. LaNiO3
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/85—Thermoelectric active materials
- H10N10/851—Thermoelectric active materials comprising inorganic compositions
- H10N10/855—Thermoelectric active materials comprising inorganic compositions comprising compounds containing boron, carbon, oxygen or nitrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/30—Three-dimensional structures
- C01P2002/34—Three-dimensional structures perovskite-type (ABO3)
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/50—Solid solutions
- C01P2002/52—Solid solutions containing elements as dopants
- C01P2002/54—Solid solutions containing elements as dopants one element only
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/77—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by unit-cell parameters, atom positions or structure diagrams
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
Definitions
- the present invention relates to a composite oxide having excellent performance as an n-type thermoelectric conversion material and an n-type thermoelectric conversion material using the composite oxide.
- thermoelectric conversion which converts thermal energy directly into electrical energy
- Thermoelectric conversion is an energy conversion method that utilizes the Seebeck effect and generates electric power by generating a potential difference by applying a temperature difference between both ends of a thermoelectric conversion material.
- thermoelectric power generation one end of the thermoelectric conversion material is placed in a high-temperature section generated by waste heat, and the other end is placed in the atmosphere (room temperature), and placed at both ends. Electricity can be obtained simply by connecting conductors, and there is no need for moving equipment such as motors and turbines required for general power generation. Therefore, the cost is low, there is no gas emission due to combustion, etc., and it is possible to continuously generate power until the thermoelectric conversion material deteriorates.
- thermoelectric power generation is an energy that is of concern in the future, and is expected to play a part in solving the problem.However, in order to realize thermoelectric power generation, it has high thermoelectric conversion efficiency, heat resistance, and chemical resistance. It is necessary to supply a large amount of thermoelectric conversion materials with excellent durability.
- C 0 0 2 based layered oxides such as C a 3 C ⁇ 4 0 9 have been reported as substances exhibiting excellent thermoelectric performance at high temperatures in air.
- all of these oxides have P-type thermoelectric properties, and materials having a positive Seebeck coefficient, That is, the material located on the high temperature side is a material having a low potential portion.
- thermoelectric power generation materials are usually required in addition to P-type thermoelectric power conversion materials.
- thermoelectric power generation using waste heat has not yet been commercialized. It has not been done.
- thermoelectric conversion materials that are composed of elements with low toxicity and high abundance, have excellent heat resistance, chemical durability, etc., and have high thermoelectric conversion efficiency is expected.
- FIG. 1 is a drawing showing an X-ray diffraction pattern of the composite oxide obtained in Example 1 and Example 541, and FIG. 2 schematically shows the crystal structures of the composite oxide 1 and the composite oxide 2.
- FIG. 3 is a schematic diagram of a thermoelectric power generation module using the composite oxide of the present invention as a thermoelectric conversion material
- FIG. 4 is a composite oxide sintered body obtained in Example 1 and Example 54.
- FIG. 5 is a graph showing the temperature dependence of the Seebeck coefficient of the composite oxide sintered body obtained in Example 1.
- FIG. 5 shows the composite oxide sintered body obtained in Example 1 and the composite obtained in Example 5 41. 5 is a graph showing the temperature dependence of the electrical resistivity of the oxide sintered body. '
- the present invention has been made in view of the above-described problems of the related art, and a main object of the present invention is to provide a novel material having excellent performance as an n-type thermoelectric conversion material.
- the present inventor has conducted intensive studies to achieve the above-mentioned object, and as a result, has found that a composite oxide having a specific composition in which a lanthanide element, Ni and O are included as essential elements, and a part of which is substituted by a specific element. Has a negative Seebeck coefficient, has a low electric resistance value, and has excellent characteristics as an n-type thermoelectric conversion material. Thus, the present invention has been completed.
- the present invention provides the following composite oxide, and an n-type thermoelectric conversion material using the composite oxide.
- L n — X M ⁇ N i O y (where L n is a lanthanide element and M Is a rare earth element that is not the same as L n, Na, K, L i, Z n, P b, B a, C a, Al and at least one element selected from the group consisting of B i, X and y are the values 0 ⁇ x ⁇ 0.8 and 2.7 ⁇ y ⁇ 3.3, respectively.
- L n ⁇ — X M X N i Oy (where L n is a lanthanide element and M is a rare earth element not identical to L n, N a, K, L i, Z n, Pb, Ba, Ca, Al, and Bi are at least one element selected from the group consisting of X and y, respectively, 0 ⁇ x ⁇ 0.8, and 2.7 ⁇ A value of y ⁇ 3.3.)
- thermoelectric conversion material comprising the composite oxide according to any one of the above items 1 to 4.
- thermoelectric power module including the n-type thermoelectric conversion material according to item 5 above.
- Composite oxides of the present invention have the general formula: L n X M X N i composite oxide that have a composition represented by O y (hereinafter, referred to as "composite oxide 1"), or
- composite oxide 2 - general formula: - a (L ni X M X) composite oxide having a composition represented by 2 N i O y (hereinafter, referred to as "composite oxide 2").
- L n is a lanthanide element
- Corrected form (Rule 91) Preferably, it is Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm or Lu.
- Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, etc. are preferred because a single phase sample containing no impurities can be easily obtained.
- M is a rare earth element that is not the same as Ln, Na, K, Li, Zn, Pb, Ba, Ca, 81 and 81. At least one element selected.
- rare earth elements include Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Lu and the like.
- M since a single-phase sample containing no impurities can be easily obtained, Na, K, Li, Zn, Pb, Ba, Ca, Al, Bi, Y, Ce, Pr, Nd, At least one element selected from the group consisting of Sm, Eu, Gd, Tb, Dy, Ho and Er is preferred. Note that M substitutes a part of Ln, and is not the same rare earth element as Ln.
- X in the general formula: (Lr ⁇ xMx) 2 N i O y is a value of 0 or more and 0.8 or less, and y is 3.6 or more, 4.4
- the values are as follows.
- each of the above-described composite oxide 1 and composite oxide 2 has a negative Seebeck coefficient.
- a temperature difference is generated between both ends of a material made of the oxide, a potential generated by a thermoelectromotive force is generated. Is higher on the high temperature side than on the low temperature side, indicating the properties as an n-type thermoelectric conversion material.
- the composite oxide 1 and the composite oxide 2 both have a negative Seebeck coefficient at a temperature of 100 or more.
- the composite oxide 1 and the composite oxide 2 have good electric conductivity, exhibit a low electric resistivity, and have an electric resistance of 1 Qcm or less at a temperature of 100 ° C or more, particularly 100 to 700 ° C. Rate.
- the X-ray diffraction pattern of the composite oxide obtained in Example 1 described later among the composite oxides 1 described above, and the composite oxide obtained in Example 541 described below in the composite oxide 2 The X-ray diffraction pattern is shown in FIG. From these X-ray diffraction patterns, although the presence of some impurities is observed, the composite oxide 1 has a belovskite-type crystal structure, and the composite oxide 2 is a related substance of belovskite. It is recognized that the material has a so-called layered perovskite structure.
- FIG. 2 shows a schematic diagram of the crystal structures of the composite oxide 1 and the composite oxide 2. As shown in FIG. 2, it has a AN i 0 3 structure of the composite oxide 1 Habe mouth Busukaito type composite oxide 2 are those having an A 2 N i 0 4 layered structure base mouth Busukaito type, A is Ln, a part of which may be replaced by M.
- the composite oxide 1 and the composite oxide 2 can be manufactured by mixing and firing the raw materials so as to have the same metal component ratio as the target composite oxide.
- the desired composite oxide can be obtained by mixing and firing the raw materials so that the metal component ratios of Ln, M and Ni are the same. .
- the raw material is not particularly limited as long as it can form an oxide by firing, and may be a simple metal, an oxide, various compounds (such as carbonates), and the like.
- oxide also other elements, chlorides, carbonates, nitrates, hydroxide , It can be used alkoxy glucoside compounds.
- a compound of the constituent elements of the complex oxide containing two or more of the present invention may be used.
- the firing temperature and the firing time are not particularly limited as long as the target composite oxide is formed, and are not particularly limited. For example, in the temperature range of about 850 to 100, It may be fired for about 40 hours.
- a carbonate, an organic compound, or the like it is preferable to calcine the raw material in advance before firing to decompose the raw material, and then fire to form the target composite oxide.
- a carbonate is used as the raw material, it may be calcined at about 600 to 800 for about 10 hours and then calcined under the above conditions.
- the firing means is not particularly limited, and any means such as an electric heating furnace and a gas heating furnace can be employed.
- the firing atmosphere is usually an oxidizing atmosphere with an oxygen partial pressure of about 1% or more, such as in an oxygen stream or air. If the raw material contains a sufficient amount of oxygen, for example, in an inert atmosphere It is also possible to bake.
- the amount of oxygen in the resulting composite oxide can be controlled by the oxygen partial pressure during firing, the firing temperature, the firing time, and the like.
- the composite oxide 1 and the composite oxide 2 of the present invention thus obtained both have a negative Seebeck coefficient and have a low electric resistivity of 1 ⁇ cm or less at a temperature of 100 or more. It has excellent thermoelectric conversion performance as an n-type thermoelectric conversion material. Further, the composite oxide is excellent in heat resistance, chemical durability and the like, and is composed of a less toxic element, and is highly practical as a thermoelectric conversion material.
- FIG. 3 shows a schematic diagram of an example of a thermoelectric power generation module using the thermoelectric conversion material comprising the composite oxide of the present invention as an n-type thermoelectric conversion element.
- the structure of the thermoelectric power generation module is the same as that of a known thermoelectric power generation module.
- the thermoelectric power generation module includes a high-temperature part substrate, a low-temperature part substrate, a p-type thermoelectric conversion material, an n-type thermoelectric conversion material, an electrode, a conductive wire, and the like. It is a power generation module, and the composite oxide of the present invention is used as an n-type thermoelectric conversion material.
- the composite oxide of the present invention has a negative Seebeck coefficient and a low electric resistivity, and is excellent in heat resistance, chemical durability and the like. By utilizing such characteristics, the composite oxide can be effectively used as an n-type thermoelectric conversion material used in high-temperature air, which was impossible with a conventional intermetallic compound. Therefore, by incorporating the composite oxide into the system as an n-type thermoelectric conversion element of a thermoelectric power generation module, it is possible to effectively use the heat energy that has been discarded in the atmosphere.
- FIG. 4 is a graph showing the temperature dependence of the Seebeck coefficient (S) of the obtained composite oxide at 100 to 700. From FIG. 4, it was confirmed that this composite oxide had a negative Seebeck coefficient at a temperature of 100 ° or more, and was an n-type material having a ⁇ potential at the high temperature side.
- the Seebeck coefficient was a negative value at 100 or more.
- FIG. 5 is a graph showing the temperature dependence of the electrical resistivity of the composite oxide. From FIG. 5, it can be seen that the electrical resistivity of the composite oxide is as low as 1 ⁇ cm or less in all ranges from 100 to 700.
- the electrical resistivity was less than 1 ⁇ cm in the entire range of 100 to 70 O :.
- the firing temperature was set in the range of 850 to 920, depending on the target composite oxide.
- a composite oxide of Examples 1 5 4 0 has a L n N i 0 3 structure Berobusukai preparative, part of L n site is replaced by M it is intended that a composite oxide of example 5 4 1-1 0 8 0 has a L n 2 n i 0 4 layered structure base Robusukai preparative, L n rhino part of i M could be replaced by
- Tables 1 to 42 below show the element ratio of each element in the obtained composite oxide, the Seebeck coefficient at 700, and the electrical resistivity at 700.
- FIG. 4 is a graph showing the temperature dependence of the Seebeck coefficient (S) at 100 ° C. to 700
- FIG. Fig. 5 shows a graph showing the temperature dependence of resistivity.
- IP s- I: 8 ⁇ ⁇ ⁇ ⁇ L0l ⁇ 6- 0 ⁇ ⁇ : ⁇ 66 * 0 iri LLQl zz 9- Z'f. I: 8 ⁇ ⁇ « ⁇ 9A0t
- N MS'0: UT; S: -0 n uq • ON ⁇ ⁇
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112004000515T DE112004000515T5 (de) | 2003-03-26 | 2004-03-24 | Mischoxid mit thermoelektrischen Eigenschaften vom n-Typ |
US10/550,670 US20060255310A1 (en) | 2003-03-26 | 2004-03-24 | Composite oxide having n-type thermoelectric characteristics |
GB0518914A GB2417135B (en) | 2003-03-26 | 2004-03-24 | Composite oxide having n-type thermoelectric characteristic |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-086006 | 2003-03-26 | ||
JP2003086006A JP4221496B2 (ja) | 2003-03-26 | 2003-03-26 | n型熱電特性を有する複合酸化物 |
Publications (2)
Publication Number | Publication Date |
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WO2004086523A1 WO2004086523A1 (ja) | 2004-10-07 |
WO2004086523A9 true WO2004086523A9 (ja) | 2005-06-30 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/004034 WO2004086523A1 (ja) | 2003-03-26 | 2004-03-24 | n型熱電特性を有する複合酸化物 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060255310A1 (ja) |
JP (1) | JP4221496B2 (ja) |
DE (1) | DE112004000515T5 (ja) |
GB (1) | GB2417135B (ja) |
WO (1) | WO2004086523A1 (ja) |
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JP4446064B2 (ja) * | 2004-07-07 | 2010-04-07 | 独立行政法人産業技術総合研究所 | 熱電変換素子及び熱電変換モジュール |
WO2008109564A1 (en) * | 2007-03-02 | 2008-09-12 | The Regents Of The University Of California | Complex oxides useful for thermoelectric energy conversion |
JP5424273B2 (ja) * | 2008-06-12 | 2014-02-26 | 国立大学法人東北大学 | 熱電変換素子 |
KR20100009455A (ko) * | 2008-07-18 | 2010-01-27 | 삼성전자주식회사 | 열전재료 및 칼코게나이드 화합물 |
US10991867B2 (en) | 2016-05-24 | 2021-04-27 | University Of Utah Research Foundation | High-performance terbium-based thermoelectric materials |
DE102019129070A1 (de) * | 2019-10-28 | 2021-04-29 | Forschungszentrum Jülich GmbH | Elektrodenmaterial, Verfahren zu dessen Herstellung und dessen Verwendung |
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US5352299A (en) * | 1987-06-26 | 1994-10-04 | Sharp Kabushiki Kaisha | Thermoelectric material |
JP3144880B2 (ja) * | 1992-02-14 | 2001-03-12 | ダイハツ工業株式会社 | 低温活性に優れた三元触媒の製造方法 |
US6060420A (en) * | 1994-10-04 | 2000-05-09 | Nissan Motor Co., Ltd. | Composite oxides of A-site defect type perovskite structure as catalysts |
EP0714850B1 (en) * | 1994-11-30 | 1999-07-28 | Sumitomo Chemical Company, Limited | Method for producing double metal oxide powder |
JP3051922B1 (ja) * | 1999-02-02 | 2000-06-12 | 工業技術院長 | 熱電変換素子用酸化物部材 |
JP2001269578A (ja) * | 2000-01-19 | 2001-10-02 | Toyota Motor Corp | 排気ガス浄化用触媒 |
JP4672160B2 (ja) * | 2000-03-24 | 2011-04-20 | 株式会社東芝 | 蓄冷器およびそれを使用した蓄冷式冷凍機 |
JP4595236B2 (ja) * | 2000-04-28 | 2010-12-08 | 株式会社豊田中央研究所 | 熱電材料の製造方法 |
JP2003008086A (ja) * | 2001-06-22 | 2003-01-10 | Idemitsu Kosan Co Ltd | 複合酸化物及びそれを用いた熱電変換素子 |
JP3968418B2 (ja) * | 2002-03-22 | 2007-08-29 | 独立行政法人産業技術総合研究所 | n型熱電特性を有する複合酸化物 |
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2003
- 2003-03-26 JP JP2003086006A patent/JP4221496B2/ja not_active Expired - Lifetime
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2004
- 2004-03-24 GB GB0518914A patent/GB2417135B/en not_active Expired - Fee Related
- 2004-03-24 US US10/550,670 patent/US20060255310A1/en not_active Abandoned
- 2004-03-24 DE DE112004000515T patent/DE112004000515T5/de not_active Withdrawn
- 2004-03-24 WO PCT/JP2004/004034 patent/WO2004086523A1/ja active Application Filing
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US20060255310A1 (en) | 2006-11-16 |
JP2004296704A (ja) | 2004-10-21 |
DE112004000515T5 (de) | 2006-02-16 |
GB2417135A (en) | 2006-02-15 |
WO2004086523A1 (ja) | 2004-10-07 |
GB2417135B (en) | 2006-08-23 |
JP4221496B2 (ja) | 2009-02-12 |
GB0518914D0 (en) | 2005-10-26 |
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