TWI391319B - 用以生成細粒化粒子的方法 - Google Patents

用以生成細粒化粒子的方法 Download PDF

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Publication number
TWI391319B
TWI391319B TW094121401A TW94121401A TWI391319B TW I391319 B TWI391319 B TW I391319B TW 094121401 A TW094121401 A TW 094121401A TW 94121401 A TW94121401 A TW 94121401A TW I391319 B TWI391319 B TW I391319B
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TW
Taiwan
Prior art keywords
metal oxide
particles
metal
mixture
oxide
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TW094121401A
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English (en)
Chinese (zh)
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TW200615229A (en
Inventor
Jose A Alarco
Geoffrey A Edwards
Peter C Talbot
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Very Small Particle Company Pty Ltd
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Publication date
Priority claimed from PCT/AU2005/000081 external-priority patent/WO2005070819A1/en
Application filed by Very Small Particle Company Pty Ltd filed Critical Very Small Particle Company Pty Ltd
Publication of TW200615229A publication Critical patent/TW200615229A/zh
Application granted granted Critical
Publication of TWI391319B publication Critical patent/TWI391319B/zh

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/32—Methods for preparing oxides or hydroxides in general by oxidation or hydrolysis of elements or compounds in the liquid or solid state or in non-aqueous solution, e.g. sol-gel process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/18—Methods for preparing oxides or hydroxides in general by thermal decomposition of compounds, e.g. of salts or hydroxides
    • C01B13/185—Preparing mixtures of oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/32—Methods for preparing oxides or hydroxides in general by oxidation or hydrolysis of elements or compounds in the liquid or solid state or in non-aqueous solution, e.g. sol-gel process
    • C01B13/328—Methods for preparing oxides or hydroxides in general by oxidation or hydrolysis of elements or compounds in the liquid or solid state or in non-aqueous solution, e.g. sol-gel process by processes making use of emulsions, e.g. the kerosine process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/36—Methods for preparing oxides or hydroxides in general by precipitation reactions in aqueous solutions
    • C01B13/363—Mixtures of oxides or hydroxides by precipitation
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/16—Preparation of alkaline-earth metal aluminates or magnesium aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/162—Magnesium aluminates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G1/00—Methods of preparing compounds of metals not covered by subclasses C01B, C01C, C01D, or C01F, in general
    • C01G1/02—Oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/003—Titanates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G3/00—Compounds of copper
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G53/00—Compounds of nickel
    • C01G53/80—Compounds containing nickel, with or without oxygen or hydrogen, and containing one or more other elements
    • C01G53/82—Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements
    • 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
    • C01P2002/32—Three-dimensional structures spinel-type (AB2O4)
    • 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
    • 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
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
    • 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
    • C01P2006/12—Surface area
    • 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
    • C01P2006/16—Pore diameter

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Nanotechnology (AREA)
  • General Physics & Mathematics (AREA)
  • Composite Materials (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
TW094121401A 2004-06-25 2005-06-27 用以生成細粒化粒子的方法 TWI391319B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58290504P 2004-06-25 2004-06-25
PCT/AU2005/000081 WO2005070819A1 (en) 2004-01-23 2005-01-24 Method for making metal oxides

Publications (2)

Publication Number Publication Date
TW200615229A TW200615229A (en) 2006-05-16
TWI391319B true TWI391319B (zh) 2013-04-01

Family

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Family Applications (1)

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TW094121401A TWI391319B (zh) 2004-06-25 2005-06-27 用以生成細粒化粒子的方法

Country Status (11)

Country Link
US (1) US7727909B2 (enExample)
EP (1) EP1812340B1 (enExample)
JP (1) JP5442199B2 (enExample)
CN (1) CN101023025A (enExample)
ES (1) ES2848387T3 (enExample)
HU (1) HUE053840T2 (enExample)
MY (1) MY143356A (enExample)
PL (1) PL1812340T3 (enExample)
PT (1) PT1812340T (enExample)
TW (1) TWI391319B (enExample)
WO (1) WO2006000049A1 (enExample)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005023048B4 (de) * 2005-05-13 2011-06-22 Forschungszentrum Jülich GmbH, 52428 Verfahren zur Herstellung eines Kathoden-Elektrolyt-Verbundes und eine Hochtemperatur-Brennstoffzelle
WO2007000014A1 (en) * 2005-06-29 2007-01-04 Very Small Particle Company Pty Ltd Method of making metal oxides
JP5268174B2 (ja) * 2005-07-27 2013-08-21 日揮触媒化成株式会社 結晶性銅アルミネート微粒子、該微粒子分散ゾル、および該微粒子の製造方法
JP5355095B2 (ja) 2006-02-16 2013-11-27 ブリガム・ヤング・ユニバーシティ 超高純度の金属酸化物、混合金属酸化物、金属、および合金の均一なナノ粒子の製造
EP2010317A4 (en) * 2006-04-12 2012-08-29 Very Small Particle Company Ltd SWEEP-RESISTANT EMISSION CATALYST
CA2569991A1 (en) * 2006-12-07 2008-06-07 Michel Gauthier C-treated nanoparticles and agglomerate and composite thereof as transition metal polyanion cathode materials and process for making
US20090220790A1 (en) * 2008-01-29 2009-09-03 The Government Of The Us As Represented By The Secretary Of The Navy Spinel Nanopowders
ES2413806T3 (es) 2008-03-20 2013-07-17 Amgen Inc. Moduladores de la aurora cinasa y método de uso
US8394352B2 (en) * 2008-12-09 2013-03-12 University Of South Carolina Porous metal oxide particles and their methods of synthesis
KR20100073704A (ko) * 2008-12-23 2010-07-01 삼성전기주식회사 복합산화물 나노 입자의 제조방법 및 그로부터 제조된 복합산화물 나노입자
DE102011108620B4 (de) * 2011-07-22 2015-08-27 Technische Universität Dresden Verfahren zur Herstellung eines Bauelements für Hochtemperaturanwendungen, mit dem Verfahren hergestelltes Bauteil sowie seine Verwendung
US9079164B2 (en) 2012-03-26 2015-07-14 Brigham Young University Single reaction synthesis of texturized catalysts
US9114378B2 (en) 2012-03-26 2015-08-25 Brigham Young University Iron and cobalt based fischer-tropsch pre-catalysts and catalysts
JP6015224B2 (ja) * 2012-08-09 2016-10-26 Dic株式会社 金属酸化物ナノ構造体の製造方法
JP5923418B2 (ja) * 2012-09-18 2016-05-24 国立大学法人九州大学 酸化セリウム粒子の製造方法
US9289750B2 (en) 2013-03-09 2016-03-22 Brigham Young University Method of making highly porous, stable aluminum oxides doped with silicon
US10374232B2 (en) 2013-03-15 2019-08-06 Nano One Materials Corp. Complexometric precursor formulation methodology for industrial production of fine and ultrafine powders and nanopowders for lithium metal oxides for battery applications
US9159999B2 (en) 2013-03-15 2015-10-13 Nano One Materials Corp. Complexometric precursor formulation methodology for industrial production of fine and ultrafine powders and nanopowders for lithium metal oxides for battery applications
US9136534B2 (en) 2013-03-15 2015-09-15 Nano One Materials Corp. Complexometric precursors formulation methodology for industrial production of high performance fine and ultrafine powders and nanopowders for specialized applications
US9698419B1 (en) 2013-03-15 2017-07-04 Nano One Materials Corp. Complexometric precursor formulation methodology for industrial production of fine and ultrafine powders and nanopowders of layered lithium mixed metal oxides for battery applications
US9343202B2 (en) * 2013-08-07 2016-05-17 The Regents Of The University Of California Transparent metal oxide nanoparticle compositions, methods of manufacture thereof and articles comprising the same
JP6255358B2 (ja) * 2015-02-18 2017-12-27 株式会社ノリタケカンパニーリミテド 固体酸化物形燃料電池用の電極材料とその利用
DE102019133872A1 (de) * 2018-12-19 2020-06-25 Friedrich-Alexander-Universität Erlangen-Nürnberg Brennstoffzelle oder Elektrolyseur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003062138A2 (fr) * 2002-01-21 2003-07-31 Rhodia Electronics And Catalysis Materiaux mesostructures integrant des particules cristallines nanometriques comprenant un metal en solution solide au sein de leur reseau cristallin

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899158A (ja) * 1981-12-09 1983-06-13 三菱化学株式会社 多孔性の耐火性無機酸化物成形体およびその製造法
JPS62132708A (ja) * 1985-12-03 1987-06-16 Nok Corp セラミツクス超微粒子の製造法
US4764493A (en) * 1986-06-16 1988-08-16 Corning Glass Works Method for the production of mono-size powders of barium titanate
BR8707507A (pt) * 1986-10-16 1989-02-21 Raychem Corp Varistores de oxido metalico,composicao em po de precursor,e metodos para a sua preparacao
GB8709515D0 (en) * 1987-04-22 1987-05-28 Tioxide Group Plc Stabilised metallic oxides
JPH0735253B2 (ja) * 1990-02-09 1995-04-19 株式会社日本触媒 ジルコニアまたはジルコニア系球状粒子および金属担持ジルコニアまたはジルコニア系球状粒子の製造方法
WO1993014022A1 (en) 1992-01-15 1993-07-22 Battelle Memorial Institute Process of forming metal compounds using reverse micelle or reverse microemulsion systems
US5284614A (en) * 1992-06-01 1994-02-08 General Electric Company Method of forming fine dispersion of ceria in tungsten
JP3321902B2 (ja) * 1993-06-07 2002-09-09 株式会社村田製作所 電子セラミックス原料粉体の製造方法
US5788950A (en) 1994-08-03 1998-08-04 Showa Denko K.K. Method for the synthesis of mixed metal oxide powders
JPH08119633A (ja) * 1994-10-25 1996-05-14 Sony Corp チタン酸バリウム微粒子の製造方法
US5698483A (en) 1995-03-17 1997-12-16 Institute Of Gas Technology Process for preparing nanosized powder
US6027958A (en) * 1996-07-11 2000-02-22 Kopin Corporation Transferred flexible integrated circuit
US6139816A (en) 1997-06-09 2000-10-31 Merck Kanto Advanced Chemical Ltd Process for the preparation of ultra-fine powders of metal oxides
DE69802095T2 (de) * 1997-07-10 2002-07-11 Merck Patent Gmbh Verfahren zur herstellung vo ultrafeinen metalloxydpulvern
JP4184487B2 (ja) 1997-08-15 2008-11-19 昭和電工株式会社 二酸化チタン微粒子の製造方法
US5879715A (en) 1997-09-02 1999-03-09 Ceramem Corporation Process and system for production of inorganic nanoparticles
US20020025294A1 (en) * 1997-12-15 2002-02-28 Dugger Cortland Otis Production of cationically-homogeneous nanostructured refractory oxides at reduced temperatures
JP4316064B2 (ja) * 1998-09-18 2009-08-19 古河機械金属株式会社 酸化チタン系光触媒微粒子の製造方法
DE19852547A1 (de) 1998-11-13 2000-05-18 Studiengesellschaft Kohle Mbh Wasserlösliche nanostrukturierte Metalloxid-Kolloide und Verfahren zu ihrer Herstellung
US6656588B1 (en) * 1998-12-01 2003-12-02 The Regents Of The University Of Michigan Ultrafine powders and their use as lasing media
JP3980272B2 (ja) * 1998-12-11 2007-09-26 昭和電工株式会社 ペロブスカイト型チタン含有複合酸化物粒子、そのゾルと製造方法、および薄膜
US6365555B1 (en) * 1999-10-25 2002-04-02 Worcester Polytechnic Institute Method of preparing metal containing compounds using hydrodynamic cavitation
ES2223372T3 (es) * 1999-12-06 2005-03-01 Haldor Topsoe A/S Procedimiento depreparacion de monocristales de zeolita.
US7365118B2 (en) 2003-07-08 2008-04-29 Los Alamos National Security, Llc Polymer-assisted deposition of films
US6752979B1 (en) * 2000-11-21 2004-06-22 Very Small Particle Company Pty Ltd Production of metal oxide particles with nano-sized grains
FR2819432B1 (fr) * 2001-01-18 2003-04-11 Rhodia Chimie Sa Catalyseur mesostructure integrant des particules de dimensions nanometriques
US6528451B2 (en) * 2001-03-13 2003-03-04 W.R. Grace & Co.-Conn. Catalyst support material having high oxygen storage capacity and method of preparation thereof
ATE452107T1 (de) * 2001-07-20 2010-01-15 Harvard College Übergangsmetalloxid-nanodrähte und diese enthaltende vorrichtungen
JP4928273B2 (ja) * 2004-01-23 2012-05-09 ベリー スモール パーティクル コンパニー リミテッド 多孔質複合酸化物の製造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003062138A2 (fr) * 2002-01-21 2003-07-31 Rhodia Electronics And Catalysis Materiaux mesostructures integrant des particules cristallines nanometriques comprenant un metal en solution solide au sein de leur reseau cristallin

Also Published As

Publication number Publication date
WO2006000049A1 (en) 2006-01-05
JP2008504199A (ja) 2008-02-14
CN101023025A (zh) 2007-08-22
PT1812340T (pt) 2021-03-03
PL1812340T3 (pl) 2021-06-14
MY143356A (en) 2011-04-29
US20070160525A1 (en) 2007-07-12
EP1812340A1 (en) 2007-08-01
JP5442199B2 (ja) 2014-03-12
HUE053840T2 (hu) 2021-07-28
EP1812340B1 (en) 2020-11-04
ES2848387T3 (es) 2021-08-09
EP1812340A4 (en) 2013-04-24
US7727909B2 (en) 2010-06-01
TW200615229A (en) 2006-05-16

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