JP4747512B2 - 熱電変換材料およびその製造方法 - Google Patents
熱電変換材料およびその製造方法 Download PDFInfo
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- JP4747512B2 JP4747512B2 JP2004145310A JP2004145310A JP4747512B2 JP 4747512 B2 JP4747512 B2 JP 4747512B2 JP 2004145310 A JP2004145310 A JP 2004145310A JP 2004145310 A JP2004145310 A JP 2004145310A JP 4747512 B2 JP4747512 B2 JP 4747512B2
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- inorganic nanoparticles
- thermoelectric conversion
- skutterudite
- conversion material
- compound
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- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 description 1
- FPZZZGJWXOHLDJ-UHFFFAOYSA-N trihexylphosphane Chemical compound CCCCCCP(CCCCCC)CCCCCC FPZZZGJWXOHLDJ-UHFFFAOYSA-N 0.000 description 1
- RMZAYIKUYWXQPB-UHFFFAOYSA-N trioctylphosphane Chemical compound CCCCCCCCP(CCCCCCCC)CCCCCCCC RMZAYIKUYWXQPB-UHFFFAOYSA-N 0.000 description 1
- ZMBHCYHQLYEYDV-UHFFFAOYSA-N trioctylphosphine oxide Chemical compound CCCCCCCCP(=O)(CCCCCCCC)CCCCCCCC ZMBHCYHQLYEYDV-UHFFFAOYSA-N 0.000 description 1
- HVYVMSPIJIWUNA-UHFFFAOYSA-N triphenylstibine Chemical compound C1=CC=CC=C1[Sb](C=1C=CC=CC=1)C1=CC=CC=C1 HVYVMSPIJIWUNA-UHFFFAOYSA-N 0.000 description 1
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
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- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C22B23/00—Obtaining nickel or cobalt
- C22B23/06—Refining
- C22B23/065—Refining carbonyl methods
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/02—Obtaining antimony
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
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- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
- Y10T428/2995—Silane, siloxane or silicone coating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
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Description
本発明の無機ナノ粒子は、スクッテルダイト化合物であり、平均粒径が2nm〜100nmの範囲内であることを特徴とするものである。
(式中、Sは熱起電力、σは電気伝導率、kは熱伝導率である。)
この性能指数Zの大きい材料ほど優れた熱電変換材料となる。
次に、本発明の無機ナノ粒子の製造方法について説明する。本発明の無機ナノ粒子の製造方法は、ホットソープ法により、スクッテルダイト化合物である無機ナノ粒子を製造することを特徴とするものである。
以下、本発明の無機ナノ粒子の製造方法の各構成について説明する。
まず、本発明に用いられる前駆体について説明する。
本発明により製造される無機ナノ粒子はスクッテルダイト化合物であることから、本発明に用いられる前駆体としては、上述した「A.無機ナノ粒子」の項に記載したスクッテルダイト化合物の構成元素を含むものであり、無機ナノ粒子を形成することが可能なものであれば特に限定されるものではない。例えばCoSb3からなる無機ナノ粒子を製造するには、前駆体としてはコバルト化合物およびアンチモン化合物を用いることができる。また例えばRhSb3からなる無機ナノ粒子を製造するには、前駆体としてはロジウム化合物およびアンチモン化合物を用いることができる。このように本発明においては、目的とするスクッテルダイト化合物に応じて、スクッテルダイト化合物の構成元素(Co,Rh,Ir,P,As,Sb)を含む化合物を用いることができる。
次に、本発明に用いられる分散剤について説明する。
本発明に用いられる分散剤としては、高温液相において微結晶に配位して安定化する物質であれば特に限定されるものではないが、例えばトリブチルホスフィン、トリヘキシルホスフィン、トリオクチルホスフィン等のトリアルキルホスフィン類、トリブチルホスフィンオキシド、トリヘキシルホスフィンオキシド、トリオクチルホスフィンオキシド、トリデシルホスフィンオキシド等の有機リン化合物、オクチルアミン、デシルアミン、ドデシルアミン、テトラデシルアミン、ヘキサデシルアミン、オクタデシルアミン等のω−アミノアルカン類、トリ(n−ヘキシル)アミン、トリ(n−オクチル)アミン等の第3級アミン類、ピリジン、ルチジン、コリジン、キノリン類の含窒素芳香族化合物等の有機窒素化合物、ジブチルスルフィド等のジアルキルスルフィド類、ジメチルスルホキシドやジブチルスルホキシド等のジアルキルスルホキシド類、チオフェン等の含硫黄芳香族化合物等の有機硫黄化合物、パルミチン酸、ステアリン酸、オレイン酸等の高級脂肪酸、アルコール類、1−アダマンタンカルボン酸、1−アダマンタン酢酸等が挙げられる。これらの中でも、ドデシルアミン、ヘキサデシルアミン、オクタデシルアミン等の炭素数12以上のω−アミノアルカン類等が好ましく用いられる。
本発明においては、上記分散剤を加熱し、この加熱した分散剤に上記前駆体を注入することにより、無機ナノ粒子を製造することができる。
[実施例1]
ホットソープ法の反応場を、下記の分散剤および溶剤にて構成した。
<分散剤>
・1,2−ヘキサデカンジオール(ALDRICH製) 1.2g
・1−アダマンタンカルボン酸(ACROS社製) 0.76g
・ヘキサデシルアミン(関東化学(株)製) 12g
<溶剤>
・ジフェニルエーテル(関東化学(株)製) 6ml
実施例1において分散剤および溶剤をフラスコ内で混合し、アルゴンガス雰囲気に置換した後に150℃に昇温する代わりに80℃に昇温した以外は、実施例1と同様にして無機ナノ粒子を作製した。得られた黒色粉体は、透過型電子顕微鏡観察により、平均粒径が約100nmの球状であることが観察された。また、X線回折分析により、黒色粉体はCoSb3のスクッテルダイト結晶構造を有することが確認された。
ホットソープ法の反応場を、下記の分散剤および溶剤にて構成した。
<分散剤>
・1,2−ヘキサデカンジオール(ALDRICH製) 1.2g
・1−アダマンタンカルボン酸(ACROS社製) 0.76g
・ヘキサデシルアミン(関東化学(株)製) 12g
<溶剤>
・ジフェニルエーテル(関東化学(株)製) 6ml
<前駆体>
・ブトキシアンチモン(アヅマックス(株)製) 0.26g
・コバルトカルボニル(関東化学(株)製) 0.043g
<溶媒>
・ジクロロベンゼン(関東化学(株)製) 2ml
・1−ヘキサデカノール(ALDRICH製) 1.0g
実施例1において1−アダマンタンカルボン酸の代わりにオレイン酸(関東化学(株)製)0.76gを添加した以外は、実施例1と同様にして無機ナノ粒子を作製した。得られた黒色粉体をX線回折分析したところ、XRDスペクトルではピークが検出されず、黒色粉体はアモルファスであることが確認された。また、走査型電子顕微鏡観察により、黒色粉体は平均粒径が約50nmの球状であることが観察された。この黒色粉体を窒素ガス雰囲気下で700℃10時間加熱したところ、外観は黒色粉体のままであったが、X線回折分析により加熱後の黒色粉体はCoSb3の結晶構造を有することが確認された。
実施例1において1,2−ヘキサデカンジオールを使用しない以外は、実施例1と同様にして無機ナノ粒子を作製したところ、ブトキシアンチモンを添加した時点で白色沈殿を生じた。得られた白色沈殿をX線回折分析したところ、白色沈殿はSb2O3であることが確認された。
Claims (5)
- スクッテルダイト化合物であり、かつ平均粒径が2nm〜100nmの範囲内であり、さらに平均粒径の標準偏差が40%以下である無機ナノ粒子を、圧縮成形されてなる熱電変換材料であって、
前記スクッテルダイト化合物は、CoSb 3 であることを特徴とする熱電変換材料。 - 前記無機ナノ粒子が、スクッテルダイト結晶構造を有することを特徴とする請求項1に記載の熱電変換材料。
- スクッテルダイト化合物であり、かつ平均粒径が2nm〜100nmの範囲内であり、さらに平均粒径の標準偏差が40%以下である無機ナノ粒子を、ホットソープ法により形成し、得られた無機ナノ粒子を圧縮成形する熱電変換材料の製造方法であって、
前記スクッテルダイト化合物は、CoSb 3 であることを特徴とする熱電変換材料の製造方法。 - 前記ホットソープ法にて、1分子中に長鎖アルキル基を1残基以上および水酸基を2残基以上有する有機化合物を用いることを特徴とする請求項3に記載の熱電変換材料の製造方法。
- 前記ホットソープ法にて、1−アダマンタンカルボン酸または1−アダマンタン酢酸を用いることを特徴とする請求項3または請求項4に記載の熱電変換材料の製造方法。
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JP2006124262A (ja) * | 2004-11-01 | 2006-05-18 | Dainippon Printing Co Ltd | InSbナノ粒子 |
US20090263659A1 (en) | 2006-09-15 | 2009-10-22 | Konica Minolta Medical & Graphic, Inc. | Semiconductor nanoparticle and method of producing the same |
JP5011949B2 (ja) * | 2006-10-25 | 2012-08-29 | トヨタ自動車株式会社 | 熱電変換素子及びその製造方法 |
US8617918B2 (en) | 2007-06-05 | 2013-12-31 | Toyota Jidosha Kabushiki Kaisha | Thermoelectric converter and method thereof |
JP4900061B2 (ja) | 2007-06-06 | 2012-03-21 | トヨタ自動車株式会社 | 熱電変換素子及びその製造方法 |
US7734428B2 (en) * | 2007-10-19 | 2010-06-08 | Toyota Motor Engineering & Manufacturing North America, Inc. | Method of producing thermoelectric material |
JP2009283565A (ja) * | 2008-05-20 | 2009-12-03 | Panasonic Corp | パターン形成方法 |
JP4803282B2 (ja) | 2009-06-18 | 2011-10-26 | トヨタ自動車株式会社 | ナノコンポジット熱電変換材料およびその製造方法 |
JP5599095B2 (ja) * | 2009-09-14 | 2014-10-01 | 学校法人東京理科大学 | 有機−無機ハイブリッド熱電材料の製造方法 |
JP5721127B2 (ja) * | 2010-03-16 | 2015-05-20 | 国立大学法人北陸先端科学技術大学院大学 | 金属ナノ材料及びその製造方法 |
DE102010049300A1 (de) * | 2010-10-22 | 2012-04-26 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Halbleiterelemente bestehend aus thermoelektrischem Material zum Einsatz in einem thermoelektrischen Modul |
KR101353924B1 (ko) * | 2013-06-10 | 2014-02-11 | 한국세라믹기술원 | 크기 제어된 CoSb2 나노입자 및 그 제조방법 |
KR101395690B1 (ko) | 2013-08-14 | 2014-05-15 | 한국세라믹기술원 | 고온주입 열분해법에 의한 CoSb3 나노입자 제조방법 |
KR101422703B1 (ko) | 2013-10-07 | 2014-08-13 | 한국세라믹기술원 | 크기 제어된 CoSb2 나노입자 및 그 제조방법 |
ES2567647B1 (es) * | 2014-09-23 | 2017-01-31 | Acondicionamiento Tarrasense | Procedimiento para la preparación de skutteruditas nanoestructuradas del tipo cosb3 |
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US6369314B1 (en) * | 1997-10-10 | 2002-04-09 | Marlow Industries, Inc. | Semiconductor materials with partially filled skutterudite crystal lattice structures optimized for selected thermoelectric properties and methods of preparation |
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US7309830B2 (en) * | 2005-05-03 | 2007-12-18 | Toyota Motor Engineering & Manufacturing North America, Inc. | Nanostructured bulk thermoelectric material |
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