WO2008023650A1 - Matériau thermoélectrique, procédé de production associé et convertisseur thermoélectrique - Google Patents
Matériau thermoélectrique, procédé de production associé et convertisseur thermoélectrique Download PDFInfo
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- WO2008023650A1 WO2008023650A1 PCT/JP2007/066062 JP2007066062W WO2008023650A1 WO 2008023650 A1 WO2008023650 A1 WO 2008023650A1 JP 2007066062 W JP2007066062 W JP 2007066062W WO 2008023650 A1 WO2008023650 A1 WO 2008023650A1
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Definitions
- the field of sickle The present invention relates to a thermoelectric pseudonym, its manufacturing method, and electric transformer.
- Thermoelectric power generation means that when a difference is made in the thermoelectric conversion fee, « ⁇ (thermolysis ® ⁇ ) is generated, that is, the Seebeck effect is used to convert thermal energy into electrical energy. It is power generation by doing.
- Thermoelectric conversion power generation is expected as a power generation that can be put to practical use because various heat sources such as the heat of a ground incinerator can be used as a source.
- the rate of change of the thermoelectric conversion fee depends on the figure of merit (z) of the thermoelectric conversion fee.
- the figure of merit (Z) is calculated using the equation (1) using the Seebeck coefficient (a), electrical conductivity (and) and conductivity () of the material.
- thermoelectric conversion material with a large figure of merit is a thermoelectric conversion element with a better energy conversion rate.
- 2 ⁇ ⁇ in Eq. (1) is called an output factor, and a thermoelectric conversion material with a larger output factor results in a thermoelectric transformer with better output per unit temperature.
- thermoelectric change fee There are two types of thermoelectric change fee: ⁇ -type thermoelectric change fee with a positive ZE-BEI coefficient and ⁇ -type thermoelectric change fee with a negative ZE-BEC coefficient.
- thermoelectric conversion power generation uses a thermoelectric transformer force S, in which a ⁇ -type thermoelectric conversion fee and a ⁇ -type thermoelectric conversion fee are electrically connected in series. Therefore, the energy leakage rate of the thermoelectric transformer is dependent on the figure of merit of the ⁇ type thermoelectric fee and the ⁇ type thermoelectric fee.
- a ⁇ -type thermoelectric conversion material and a ⁇ -type thermoelectric conversion material with a large figure of merit are required.
- an n-type thermoelectric conversion material a thermoelectric conversion material obtained by mixing titanium oxide and tantalum oxide (or titanium oxide and niobium oxide), molding and bonding in air is known. ing
- An object of the present invention is to provide an n-type thermoelectric conversion material having a large figure of merit and output factor, and a method for producing the same.
- thermoelectric metaphor composed of oxides containing Ti, M and O
- M is at least one selected from the group consisting of V, Nb and Ta, X is 0.05 or more and 0.5 or less,
- y is 1.90 or more and 2.02 or less.
- thermoelectric pseudo artificial material according to ⁇ 1> wherein the oxide has a rutile-type crystal.
- the oxide has an a-axis lattice constant of 0.4590 nm or more and 0.4730 ⁇ m or less, and a c-axis lattice 3 ⁇ 4 C of 0.2950 nm3 ⁇ 4 ⁇ 0.3000 nm or less.
- Thermoelectric transformation ⁇ t department has an a-axis lattice constant of 0.4590 nm or more and 0.4730 ⁇ m or less, and a c-axis lattice 3 ⁇ 4 C of 0.2950 nm3 ⁇ 4 ⁇ 0.3000 nm or less.
- M is N b 1> ⁇ 3 3
- thermoelectric transformation fee is a body, power, and the relative density of the male body is 60% or more.
- thermoelectric metabolite according to ⁇ 5>, wherein the thermoelectric metabolite is at least partially coated with an S-oxygen film.
- thermoelectric key with the thermoelectric material described in any one of ⁇ 1> to ⁇ 6>.
- ⁇ 8> Including steps (a) and (b).
- T i T i
- M is at least one selected from the group consisting of V, Nb, and T a) and O
- M is the total amount (mole) of T i and M
- Figure 1 shows the X-ray diffraction pattern of ⁇ / Conjugation 1-7.
- Figure 2 shows the relationship between the lattice ratio (a-axis, c-axis) of the thermoelectric transformation material of chassis 1-13 and the molar ratio X.
- Figure 3; Shows the temperature dependence of Zebeck coefficient in ligatures 1, 3, and 10.
- Figure 4 shows the temperature dependence of the electrical conductivity of the enclosures 1, 3, and 10.
- Figure 5 shows the temperature dependence of the 3 ⁇ 4f conductivity for the fired bodies 1,.
- FIG. 6 shows the 3 ⁇ 4g dependency of the output factor in Examples 1, 3, and 10.
- Figure 7 shows the temperature dependence of the dimensionless figure of merit in 3 ⁇ 4Sf columns 1, 3, and 10.
- thermoelectric transformation material of the present invention comprises an oxide containing titanium (Ti), M and silicon (O).
- M is vanadium (V), web (Nb), or tantalum (Ta). These may be single or combination.
- the oxide is expressed by the tfit self formula (1).
- X is 0.05 or more and 0.5 or less. From the viewpoint of increasing the output factor, X is preferably 0.05 or more and 0.20 or less. X If the force is less than SO. 05, the electrical conductivity tends to be small, and the output factor is not low. When X exceeds 0.5, the Seebeck coefficient tends to decrease.
- y is 1.90 or more and 2.02 or less. From the viewpoint of increasing the output factor, y is preferably 1.93 or more and 2.01 or less.
- impurity crystal phases T i n ⁇ ⁇ is & ⁇ and tend to Seebeck coefficient becomes small, not a power factor is a value.
- y exceeds 2.02 the impurity crystal phase (for example, when M is N b, T i N b 2 0 5 , Nb 2 0 5, etc.) is obtained, and the electrical conductivity force M, The output factor is not sufficient.
- x is more preferably 0.10 or more and 0.15 or less, and y is 1.96 or more and less than 1.99.
- X is more preferably 0.15 or more and 0.20 or less.
- the oxide has a rutile type, anatase type, brucite type, preferably a nor type crystal structure. If the oxide has a rutile crystal structure, the energy conversion efficiency is high even at high temperatures, making it difficult to cause deterioration due to a long shelf, and a thermoelectric converter is generated.
- Oxide force S-rutile Has crystal structure: ⁇ , a-axis lattice maiden is 0.459011111 or more and 0.473 Onm or less, preferably 0.44600nm or more and 0.4660nm or less, c-axis lattice is 0.2950nm or more It is not more than 3000 nm, preferably not less than 0.2960 nm and not more than 0-2990 nm. In the oxide, when the a-axis and c-axis lattices are within the above range, the output factor of the thermoelectric pseudo artificial talent becomes larger.
- thermoelectric transformation material is in the form of, for example, a powder, a consolidated body, or a thin film, and preferably a sintered body.
- shape of the thermoelectric transformation material may be a shape suitable for a thermoelectric conversion element, such as a plate, a cylinder, a disk, and a prism.
- thermoelectric metaphor is preferably high in orientation from the viewpoint of increasing electrical conductivity.
- highly oriented forms include oriented sintered bodies and single crystals.
- thermoelectric transformation fee is n-type and has a large output factor. By combining it with the p-type thermoelectric transformation material, the thermoelectric transformation force S having a large figure of merit is generated.
- thermoelectric transport fee by the method of shape
- the raw materials used in the next step (b) may be prepared by weighing and mixing the Ti-containing material and the M-containing material so as to achieve a predetermined yarn destruction.
- X is 0.05 or more and 0.5 or less
- y is 1.90 or more, preferably 1.93 or more, 2.02 or less, preferably 2.01 or less.
- T i: M 0.95 to 0.5: 0. 05 — 0.5. You just need to match.
- T i: M 0. 9 5 ⁇ 0.8: 0. 05 ⁇ 0.2
- T i: M 0. 9 5 ⁇ 0.8: 0. 05 ⁇ 0.2
- T i containing material for example, T i 0 2, T i 2 ⁇ 3, titanium oxide such as T i O, Ru T i der.
- the titanium-containing material is usually at least two of these pairs, preferably T i 0 2 and T i threads.
- M-containing substances are, for example, N b 2 ⁇ niobium arsenide such as 5, T a 2 ⁇ tantalate I ⁇ such as 5, vanadium oxide such as V 2 0 5, N b, T a, V.
- the M-containing material is usually at least one of these, preferably an oxide.
- Mixing may be performed either dry or wet.
- ball mill V type mixer,
- 3 ⁇ 43 ⁇ 43 ⁇ 4 Use a mill, attritor, dyno mill, or dynamic mill.
- the resulting kelp compound is molded! /
- the mixture may be bandited. For example, if the amount of O (mol) relative to the total amount (mol) of T i and TV [in the mixture exceeds 2.02, the mixture is calcined in a reducing gas atmosphere to adjust the molar ratio. It can be used as a raw material. On the other hand, it is less than 1.90: tj ⁇ , the mixture may be fined in an oxidizing gas atmosphere to adjust the molar ratio and used as a raw material. In addition, a mixture that is not less than 1.90 and not more than 2.02 in an inert gas atmosphere; 3 ⁇ 4 Deformation of the housing may be suppressed. Sincerely in an inert gas atmosphere, the bandit condition is a mixture!
- step (b) the raw material is formed and reinforced.
- the forming may be performed by, for example, a uniaxial press, a cold isostatic press (CIP), a mechanical press, a hot press, or a hot isostatic press (HIP).
- the molding may be selected according to the shape of the thermoelectric key.
- the shape is, for example, a plate, a cylinder, a disk, or a prism.
- a binder, a dispersant, a sequestering agent, etc. may be added to the raw material.
- the ligation takes place in an inert atmosphere.
- the inert gas is, for example, a nitrogen-containing gas, a rare gas-containing gas, preferably a rare gas-containing gas, and more preferably a rare gas job.
- the rare gas is preferably argon (A r) force S from the viewpoint of operability.
- the result 3 ⁇ 4g is 900. C or higher 1700 ° C or lower, preferably 1200 ° C or higher 1550 ° C, more preferably 1250 ° C or higher 1 4 5 0. C or less. ;
- k ligation & g is less than 900 ° C, solid-state reaction and ⁇ ; ligation does not proceed sufficiently, and electrical conductivity decreases due to annihilation.
- the male exceeds 1700 ° C, the desired oxide strength cannot be obtained due to elution and volatilization of the constituent elements depending on the thread, and the performance index of the thermoelectric transformation material will be low.
- the sintering time is usually about 0.5 to 24 hours.
- the forming of the raw material and the male may be performed simultaneously.
- a hot press or a hot isostatic press may be used.
- the obtained body has a consolidation density of usually 60% or more, and preferably 80% or more, more preferably 85% or more from the viewpoint of improving the daughter of the male body.
- a thermoelectric conversion material composed of such a high density body has a high electric conductivity.
- the density of the male body can be controlled by, for example, the particle size of the raw material, the molding pressure, the J3 ⁇ 4 result, and the male time.
- the nodule may be obtained by pulverizing and pulverizing the resulting product with the above-described cattle as necessary.
- the surface of the housing may be coated with an oxygen-free film.
- the oxygen non-film may be any film that does not permeate or hardly permeate oxygen, and is made of, for example, alumina, titania, dinoleconia, silica, or silicon carbide.
- the coating can be done with the air opening, ⁇ ⁇ 'position, thermal spraying, CVD, etc.
- the thermoelectric transformation material made of such a coating is used in an oxidizing atmosphere, and even when used in an oxidizing atmosphere, the surface heat is suppressed and it is difficult to reduce performance.
- thermoelectric conversion material is a method including a coprecipitation step, a method including a zK thermal step, a method including a dry process, a method including a notching step, a method including a CVD step, It may be produced by a method including a sol-gel process, a process including an FZ (floating and melting method) process, and a process including a TSCG (template type single crystal growth method).
- thermoelectric transformer of the present invention has the above-described n-type thermoelectric transformation material, and usually has an n-type thermoelectric transformation talent, a P-type thermoelectric transformation talent, nmS, and p3 ⁇ 4l.
- p-type thermoelectric variable ⁇ fee for example, NaC o 2 0 4
- Ca 3 is a C o 4 ⁇ 9 (JP-A 9 321 346, JP 2001- 6402 1 JP).
- a commercially available product may be used as the P-type thermoelectric change retirement fee.
- the thermoelectric key can be manufactured by the following method (for example, JP-A-5-315657). Example
- thermoelectric transformation fee ⁇
- the ligature machine was processed into a square shape, and a white candy was attached with I ⁇ st, and measurement was performed by a direct current four-way method. The measurement was performed while changing in the range of room temperature to 500 ° C in a nitrogen gas flow.
- the shape was processed in the same way as when measuring the electrical conductivity; 3 ⁇ 4g R heat and white springs were attached to both ends of the coating material, and 3 ⁇ 4g and heat generation ⁇ were measured.
- the measurement was performed while changing SJt in the range of room temperature to 50 ° C. in a nitrogen gas flow. ⁇ Cooling one side of # 1 with a cooling tube to create a low temperature part, measuring the temperature at both ends of the machine with one heat, and at the same time, the heat generation occurring between both ends of the sintered body sample 3 ⁇ 4 ⁇ ( ⁇ ) was also measured. ; Difference between both ends of the charge ( ⁇ T) was controlled in the range of 0.5 to 10 ° C, and the Seebeck coefficient () was calculated from the slope of ⁇ and AV.
- the specific heat and heat rate of the photographic machine were measured in a vacuum using a laser flash method while changing 3 ⁇ 4 from room temperature to 500 ° C.
- the TC-1 7000 model was used for the measurement.
- the crystal structure of the dough was analyzed by powder X-ray diffractometry using a Rigaku X-ray diffractometer RI NT 250 OTT R type and CuKa as a radiation source.
- the rutile crystal marrow samples Noki ⁇ (a-axis, c-axis) In its use the X-ray diffraction pattern obtained by X-ray diffraction to identify the peak due to rutile ⁇ structure, from the values of the peak position (2 theta) Calculated using the least squares method.
- the destruction of the M element in the funnel was measured using a Philips Fluorescent Butterfly PW1480.
- the amount of O contained in the funnel is 1000 ° C to 1200 ° C in the atmosphere (Ta was used as the starting material: ⁇ was 1000 ° C, Nb was used: ⁇ was 1200 °
- the amount of weight * t ⁇ added when heat treatment was performed for 48 hours was calculated as an increment of 0. 5. Density of sintered body
- Example 1 The degree of powder was measured by the Archimedes method, and the relative density was calculated based on the degree of difficulty and the lattice data obtained by the powder X-ray diffraction method.
- Example 1 The degree of powder was measured by the Archimedes method, and the relative density was calculated based on the degree of difficulty and the lattice data obtained by the powder X-ray diffraction method.
- the mixture was molded by uniaxial pressing (pressing pressure: 200 kg / cm 2 ), and the resulting disk-shaped molded body was 1000 under an argon gas atmosphere (Ar purity: 99. 9995%). Baked with C for 3 hours.
- the resulting ⁇ product was dried and framed by a ball mill (medium: Zircoyu pole).
- the obtained powdered product was transferred by a uniaxial press (molding pressure: 200 kg / cm 2 ) and further by a hydrostatic press (opening pressure: 1500 kg / cm 2 ), and the obtained disk-shaped compact was placed in a sintering furnace. Sintered at 1300 ° C for 12 hours under an anoregon gas atmosphere (A r: 99. 9995%) to obtain ⁇ body 1.
- ⁇ 3 ⁇ 4A body 1 had a black color and a relative density of 82.3%.
- Conjugate 1 was composed of rutile crystal cocoons whose lattice maiden had an a-axis of 0.4680 nm and a c-axis of 0.2968 ⁇ m.
- Table 1 shows the destruction of the rod 1, the lattice 3 ⁇ 43 ⁇ 4, and the relative density.
- Table 1 shows the starting materials and the amounts used in the active bodies 2 to 13.
- Sintered bodies 2 to 13 were obtained by performing the same operation as [Preparation of raw materials for Noh and [ ⁇ shape, sintering] in difficult example 1 except that the amount of starting material used was changed. All of the active bodies 2 to 13 had a noretyl crystal structure. Various physical properties of the sintered bodies 2 to 13 are shown in Tables 2 and 3.
- Table 4 shows the starting materials and the amounts used in the cases 15 and 16.
- Sintered bodies 15 and 16 were obtained in the same manner as in Example 14 except that the amount of starting material used was changed.
- Tables 5 and 6 show the physical properties of Conjugates 15 and 16. Amount of starting material used
- Table 7 shows the amounts of starting materials used in cases 17 to 19 in Table 7. Except for changing the amount of the starting material used, the same operations as in Preparation of ligation material in Example 1 and [ ⁇ form, mi] were performed to obtain ligatures 17 to 19. ;;;;;; Conjugates 1 7 to 1 9 are composed of two phases, one in which T i 0 2 is a noretinore 3 ⁇ 4 crystal structure and another in T i N b 2 0 7 crystal structure. Was low. Tables 8 and 9 show the properties of the sintered bodies 17 to 19.
- thermoelectric conversion neo-material of the present invention has a high figure of merit and output factor, high energy conversion efficiency, large output per unit, and is useful for thermoelectric transformers.
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- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
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- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07792678A EP2061097A4 (en) | 2006-08-24 | 2007-08-13 | THERMOELECTRIC MATERIAL, METHOD FOR THE PRODUCTION THEREOF AND THERMOELECTRIC CONVERTER |
| US12/438,173 US8217256B2 (en) | 2006-08-24 | 2007-08-13 | Thermoelectric material, method for producing the same, and thermoelectric converter |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-227483 | 2006-08-24 | ||
| JP2006227483 | 2006-08-24 | ||
| JP2007104644A JP4967772B2 (ja) | 2006-08-24 | 2007-04-12 | 熱電変換材料およびその製造方法 |
| JP2007-104644 | 2007-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008023650A1 true WO2008023650A1 (fr) | 2008-02-28 |
Family
ID=39106735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/066062 Ceased WO2008023650A1 (fr) | 2006-08-24 | 2007-08-13 | Matériau thermoélectrique, procédé de production associé et convertisseur thermoélectrique |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8217256B2 (ja) |
| EP (1) | EP2061097A4 (ja) |
| JP (1) | JP4967772B2 (ja) |
| KR (1) | KR20090047537A (ja) |
| TW (1) | TW200817306A (ja) |
| WO (1) | WO2008023650A1 (ja) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008133153A1 (ja) * | 2007-04-12 | 2008-11-06 | Sumitomo Chemical Company, Limited | 熱電変換材料、その製造方法および熱電変換素子 |
| US20120068389A1 (en) * | 2010-09-17 | 2012-03-22 | Chan Park | Methods of fabricating polycrystalline ceramic for thermoelectric devices |
| CN103400932A (zh) * | 2008-08-29 | 2013-11-20 | Lg化学株式会社 | 新型热电转换材料及其制备方法,以及使用该新型热电转换材料的热电转换元件 |
| US20140004444A1 (en) * | 2010-09-28 | 2014-01-02 | Isotta Cerri | Fuel cell electrocatalyst |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5450159B2 (ja) * | 2010-02-25 | 2014-03-26 | チタン工業株式会社 | 電極用酸化チタン系化合物及びそれを用いたリチウム二次電池 |
| KR101151696B1 (ko) * | 2010-09-10 | 2012-06-15 | 한국세라믹기술원 | Na(Co,Ag)2O4-계 열전재료 및 용액연소법을 이용한 그의 제조 방법 |
| US9227876B2 (en) * | 2011-09-16 | 2016-01-05 | The Australian National University | High dielectric constant material |
| CN106458764A (zh) * | 2014-07-03 | 2017-02-22 | 京瓷株式会社 | 电介质材料以及电子部件 |
| CN111410527B (zh) * | 2020-03-20 | 2021-06-22 | 广东风华高新科技股份有限公司 | 一种复相巨介电陶瓷材料及其制备方法 |
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| JPH05315657A (ja) | 1992-05-12 | 1993-11-26 | Hitachi Ltd | 熱電変換素子と熱電変換装置 |
| JPH09321346A (ja) | 1996-05-29 | 1997-12-12 | Kokusai Chodendo Sangyo Gijutsu Kenkyu Center | 熱電変換材料及び熱電変換素子 |
| JP2001064021A (ja) | 1999-08-26 | 2001-03-13 | Agency Of Ind Science & Technol | 高いゼーベック係数と高い電気伝導度を有する複合酸化物 |
| JP2005276959A (ja) | 2004-03-24 | 2005-10-06 | National Institute Of Advanced Industrial & Technology | 熱電変換材料、熱電変換素子およびこれを用いる熱電発電素子 |
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| JP4468044B2 (ja) * | 2004-03-30 | 2010-05-26 | 株式会社東芝 | 熱電材料および熱電変換素子 |
| US20090205697A2 (en) * | 2004-07-27 | 2009-08-20 | Sumitomo Chemical Company, Limited | Thermoelectric conversion material and process for producing the same |
| JP2006193804A (ja) * | 2005-01-17 | 2006-07-27 | Nippon Sheet Glass Co Ltd | スパッタリング用ターゲット、それを用いて形成した誘電体膜およびその製造方法 |
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2007
- 2007-04-12 JP JP2007104644A patent/JP4967772B2/ja not_active Expired - Fee Related
- 2007-08-13 WO PCT/JP2007/066062 patent/WO2008023650A1/ja not_active Ceased
- 2007-08-13 US US12/438,173 patent/US8217256B2/en not_active Expired - Fee Related
- 2007-08-13 EP EP07792678A patent/EP2061097A4/en not_active Withdrawn
- 2007-08-13 KR KR1020097005759A patent/KR20090047537A/ko not_active Withdrawn
- 2007-08-14 TW TW096129932A patent/TW200817306A/zh unknown
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| JPH05315657A (ja) | 1992-05-12 | 1993-11-26 | Hitachi Ltd | 熱電変換素子と熱電変換装置 |
| JPH09321346A (ja) | 1996-05-29 | 1997-12-12 | Kokusai Chodendo Sangyo Gijutsu Kenkyu Center | 熱電変換材料及び熱電変換素子 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008133153A1 (ja) * | 2007-04-12 | 2008-11-06 | Sumitomo Chemical Company, Limited | 熱電変換材料、その製造方法および熱電変換素子 |
| CN103400932A (zh) * | 2008-08-29 | 2013-11-20 | Lg化学株式会社 | 新型热电转换材料及其制备方法,以及使用该新型热电转换材料的热电转换元件 |
| US20120068389A1 (en) * | 2010-09-17 | 2012-03-22 | Chan Park | Methods of fabricating polycrystalline ceramic for thermoelectric devices |
| US20140004444A1 (en) * | 2010-09-28 | 2014-01-02 | Isotta Cerri | Fuel cell electrocatalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200817306A (en) | 2008-04-16 |
| JP4967772B2 (ja) | 2012-07-04 |
| US8217256B2 (en) | 2012-07-10 |
| EP2061097A4 (en) | 2011-06-01 |
| KR20090047537A (ko) | 2009-05-12 |
| US20100175735A1 (en) | 2010-07-15 |
| EP2061097A1 (en) | 2009-05-20 |
| JP2008078608A (ja) | 2008-04-03 |
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