WO2003076337A3 - Process for making nano-sized stabilized zirconia - Google Patents

Process for making nano-sized stabilized zirconia Download PDF

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Publication number
WO2003076337A3
WO2003076337A3 PCT/US2002/032914 US0232914W WO03076337A3 WO 2003076337 A3 WO2003076337 A3 WO 2003076337A3 US 0232914 W US0232914 W US 0232914W WO 03076337 A3 WO03076337 A3 WO 03076337A3
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WO
WIPO (PCT)
Prior art keywords
zirconium
produce
solution
stabilized zirconia
stabilizing agent
Prior art date
Application number
PCT/US2002/032914
Other languages
French (fr)
Other versions
WO2003076337A2 (en
WO2003076337B1 (en
Inventor
Bruce J Sabacky
Timothy M Spitler
Original Assignee
Altair Nanomaterials Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Altair Nanomaterials Inc filed Critical Altair Nanomaterials Inc
Priority to JP2003574566A priority Critical patent/JP2005519020A/en
Priority to CA002465505A priority patent/CA2465505A1/en
Priority to AU2002367590A priority patent/AU2002367590B2/en
Priority to EP02807043A priority patent/EP1440039A2/en
Publication of WO2003076337A2 publication Critical patent/WO2003076337A2/en
Publication of WO2003076337A3 publication Critical patent/WO2003076337A3/en
Publication of WO2003076337B1 publication Critical patent/WO2003076337B1/en

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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/486Fine ceramics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00Nanotechnology for materials or surface science, e.g. nanocomposites
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G25/00Compounds of zirconium
    • C01G25/02Oxides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605Treating the starting powders individually or as mixtures
    • C04B35/62645Thermal treatment of powders or mixtures thereof other than sintering
    • C04B35/62655Drying, e.g. freeze-drying, spray-drying, microwave or supercritical drying
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/50Solid solutions
    • C01P2002/52Solid solutions containing elements as dopants
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/70Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/76Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by a space-group or by other symmetry indications
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/01Particle morphology depicted by an image
    • C01P2004/03Particle morphology depicted by an image obtained by SEM
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/60Particles characterised by their size
    • C01P2004/64Nanometer sized, i.e. from 1-100 nanometer
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5454Particle size related information expressed by the size of the particles or aggregates thereof nanometer sized, i.e. below 100 nm

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Nanotechnology (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Structural Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Thermal Sciences (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

A process to produce stabilized zirconia from a solution of zirconium salt and a stabilizing agent. The zirconium salt may include zirconium oxysulfate, zirconium oxychloride, zirconium oxynitrate, zirconium nitrate, and other water-soluble zirconium salts. The stabilizing agent may include calcium, magnesium, yttrium salts of oxides and rare earth oxides. The process is conducted by evaporation of the solution above the boiling point of the solution but below the temperature where there is significant crystal growth. The evaporation step is followed by calcination to produce the desired nano-sized structure. Further processing by sintering may be applied to produce solid structures or by milling and classification to produce material for thermal spray coating.
PCT/US2002/032914 2001-11-02 2002-10-16 Process for making nano-sized stabilized zirconia WO2003076337A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2003574566A JP2005519020A (en) 2001-11-02 2002-10-16 Method for producing nano-sized stabilized zirconia
CA002465505A CA2465505A1 (en) 2001-11-02 2002-10-16 Process for making nano-sized stabilized zirconia
AU2002367590A AU2002367590B2 (en) 2001-11-02 2002-10-16 Process for making nano-sized stabilized zirconia
EP02807043A EP1440039A2 (en) 2001-11-02 2002-10-16 Process for making nano-sized stabilized zirconia

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/053,177 US6982073B2 (en) 2001-11-02 2001-11-02 Process for making nano-sized stabilized zirconia
US10/053,177 2001-11-02

Publications (3)

Publication Number Publication Date
WO2003076337A2 WO2003076337A2 (en) 2003-09-18
WO2003076337A3 true WO2003076337A3 (en) 2003-11-27
WO2003076337B1 WO2003076337B1 (en) 2004-02-12

Family

ID=21982417

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/032914 WO2003076337A2 (en) 2001-11-02 2002-10-16 Process for making nano-sized stabilized zirconia

Country Status (6)

Country Link
US (1) US6982073B2 (en)
EP (1) EP1440039A2 (en)
JP (1) JP2005519020A (en)
AU (1) AU2002367590B2 (en)
CA (1) CA2465505A1 (en)
WO (1) WO2003076337A2 (en)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002324420A1 (en) * 2001-02-12 2002-12-23 Elena Mardilovich Precursors of engineered powders
US20060248982A1 (en) * 2001-02-20 2006-11-09 Nanoproducts Corp. Nanomaterials manufacturing methods and products thereof
TWI288121B (en) * 2001-06-04 2007-10-11 Sumitomo Chemical Co Process for producing zirconia powder
EP1282180A1 (en) * 2001-07-31 2003-02-05 Xoliox SA Process for producing Li4Ti5O12 and electrode materials
DE60334610D1 (en) * 2002-03-08 2010-12-02 Altair Nanomaterials Inc METHOD FOR PRODUCING NANOSCANIC AND SUBMICRON SCALING LITHIUM TRANSITION METAL OXIDES
EP1561508A4 (en) * 2002-11-08 2006-02-22 Dai Ichi Kogyo Seiyaku Co Ltd Inorganic fine particles, inorganic raw material powder, and method for production thereof
JP4411466B2 (en) * 2003-08-05 2010-02-10 Dowaエレクトロニクス株式会社 Zirconium oxide fine powder and method for producing the same
US7482304B2 (en) * 2003-12-10 2009-01-27 Altair Nanomaterials Inc. Method for producing structures
KR20070042176A (en) * 2004-07-13 2007-04-20 알타이어나노 인코포레이티드 Ceramic structures for prevention of drug diversion
CN101039877A (en) * 2004-09-01 2007-09-19 先进纳米技术有限公司 A zirconia ceramic
KR20070083557A (en) 2004-09-23 2007-08-24 엘리먼트 씩스 (프티) 리미티드 Polycrystalline abrasive materials and method of manufacture
US8401637B2 (en) * 2004-11-24 2013-03-19 Galvani, Ltd. Medium voltage therapy applications in treating cardiac arrest
US7241437B2 (en) * 2004-12-30 2007-07-10 3M Innovative Properties Company Zirconia particles
US20060204745A1 (en) * 2005-03-14 2006-09-14 Jones Clint L Light management films with zirconia particles
EP1869509A2 (en) * 2005-03-11 2007-12-26 3M Innovative Properties Company Light management films with zirconia particles
DE102005021131A1 (en) * 2005-05-06 2006-11-09 Robert Bosch Gmbh Sensor element for gas sensors
JP2009505824A (en) * 2005-08-23 2009-02-12 アルテアナノ インコーポレイテッド Advanced photocatalytic phosphorus-doped anatase TiO2 composition and process for its production
EP1974407A2 (en) * 2005-10-21 2008-10-01 Altairnano, Inc Lithium ion batteries
WO2007103829A1 (en) * 2006-03-02 2007-09-13 Altairnano, Inc. Method for production of metal oxide coatings
US20080038482A1 (en) * 2006-03-02 2008-02-14 Fred Ratel Method for Low Temperature Production of Nano-Structured Iron Oxide Coatings
WO2007103820A1 (en) * 2006-03-02 2007-09-13 Altairnano, Inc. Nanostructured indium-doped iron oxide
CN100366536C (en) * 2006-03-10 2008-02-06 北京工业大学 Method for preparing zirconium dioxide mesoporous molecular sieve
US7842200B2 (en) * 2006-05-30 2010-11-30 University Of Maryland, College Park Solid oxide fuel cell (SOFC) anode materials
KR20090129500A (en) * 2007-03-30 2009-12-16 알타이어나노 인코포레이티드 Method for preparing a lithium ion cell
WO2008128000A1 (en) * 2007-04-12 2008-10-23 Altairnano, Inc. Teflon replacements and related production methods
CN102105319A (en) 2008-06-27 2011-06-22 普罗特拉公司 Vehicle battery systems and methods
US8298329B2 (en) 2010-04-29 2012-10-30 James R. Glidewell Dental Ceramics, Inc. Nano-crystalline dental ceramics
US8750990B1 (en) 2012-12-12 2014-06-10 Galvani, Ltd. Coordinated medium voltage therapy for improving effectiveness of defibrillation therapy
US9663400B2 (en) 2013-11-08 2017-05-30 Corning Incorporated Scratch-resistant liquid based coatings for glass
CN108706631B (en) * 2018-08-08 2020-04-28 景德镇陶瓷大学 Preparation method of rectangular flaky monoclinic zirconia
CN110256070B (en) * 2019-07-31 2022-05-17 三祥新材股份有限公司 Preparation method of zirconia film material
CZ308831B6 (en) * 2020-09-06 2021-06-23 České vysoké učení technické v Praze Method of preparing zirconia nanoparticles
CN113816735A (en) * 2021-10-08 2021-12-21 北京伽瓦新材料科技有限公司 Method for microwave synthesis of 4YSZ nano zirconia thermal barrier coating powder
CN114408968A (en) * 2022-01-25 2022-04-29 山东理工大学 Rare earth stabilized zirconia nano powder and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639356A (en) * 1985-11-05 1987-01-27 American Cyanamid Company High technology ceramics with partially stabilized zirconia
EP0337472A2 (en) * 1988-04-14 1989-10-18 ISTITUTO GUIDO DONEGANI S.p.A. Process for preparing submicronic powders of zirconium oxide stabilized with yttrium oxide
US5660774A (en) * 1993-09-27 1997-08-26 Alfred University Process for making a sintered body from ultra-fine superconductive particles

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065544A (en) 1970-05-11 1977-12-27 Union Carbide Corporation Finely divided metal oxides and sintered objects therefrom
GB1489927A (en) 1974-08-10 1977-10-26 Tioxide Group Ltd Titanium dioxide carrier
EP0214308B1 (en) 1985-03-05 1993-07-28 Idemitsu Kosan Company Limited Method for preparing super-fine spherical particles of metal oxide
JPS62260718A (en) * 1986-05-06 1987-11-13 Shigeyuki Somiya Production of ultrafine powder of high-purity zirconia-alumina by hydrothermal process
US4944936A (en) 1987-04-10 1990-07-31 Kemira, Inc. Titanium dioxide with high purity and uniform particle size and method therefore
US5141634A (en) * 1988-02-03 1992-08-25 Regents Of The University Of Minnesota High stability porous zirconium oxide spherules
GB8829402D0 (en) 1988-12-16 1989-02-01 Tioxide Group Plc Dispersion
US4923682A (en) 1989-03-30 1990-05-08 Kemira, Inc. Preparation of pure titanium dioxide with anatase crystal structure from titanium oxychloride solution
DE4211560A1 (en) 1992-04-07 1993-10-14 Merck Patent Gmbh Composite pigment prodn. - by spraying drying aq. suspension of substrate particles and fine pigment free from additive, used in plastics, lacquer, ink and cosmetics
JP3502118B2 (en) 1993-03-17 2004-03-02 松下電器産業株式会社 Method for producing lithium secondary battery and negative electrode thereof
AU675477B2 (en) 1993-12-13 1997-02-06 Ishihara Sangyo Kaisha Ltd. Ultrafine iron-containing rutile titanium dioxide particle and process for producing the same
US5698177A (en) 1994-08-31 1997-12-16 University Of Cincinnati Process for producing ceramic powders, especially titanium dioxide useful as a photocatalyst
DE19543204C2 (en) 1995-11-20 1997-09-18 Bayer Ag Process for the production of nanodisperse titanium dioxide and its use
JPH09272815A (en) 1996-04-02 1997-10-21 Merck Japan Kk Composite metal oxide fine particle and production of the same
JP4018770B2 (en) 1997-02-28 2007-12-05 チタン工業株式会社 Fan-shaped titanium oxide, method for producing fan-shaped or plate-shaped titanium oxide, and use thereof
KR100277164B1 (en) 1998-07-16 2001-01-15 장인순 A preparing method for crystalline micropowder of Titania from aqueous Titanium(Ⅳ) chloride by homogeneous precipitation process at low temperature
US6375923B1 (en) 1999-06-24 2002-04-23 Altair Nanomaterials Inc. Processing titaniferous ore to titanium dioxide pigment
US6440383B1 (en) 1999-06-24 2002-08-27 Altair Nanomaterials Inc. Processing aqueous titanium chloride solutions to ultrafine titanium dioxide
DE60013134T2 (en) 1999-06-24 2005-09-08 Altair Technologies Inc., Reno PREPARATION OF TITANIUM DIOXIDE PIGMENTS FROM AQUEOUS, TITANIUM-SOLVED SOLUTIONS
US6376590B2 (en) * 1999-10-28 2002-04-23 3M Innovative Properties Company Zirconia sol, process of making and composite material
JP2004508261A (en) 2000-09-05 2004-03-18 アルテア ナノマテリアルズ インコーポレイテッド Method for producing mixed metal oxide and metal oxide compound
AU2002224394A1 (en) 2000-10-17 2002-04-29 Altair Nanomaterials Inc. Method for producing catalyst structures

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639356A (en) * 1985-11-05 1987-01-27 American Cyanamid Company High technology ceramics with partially stabilized zirconia
EP0337472A2 (en) * 1988-04-14 1989-10-18 ISTITUTO GUIDO DONEGANI S.p.A. Process for preparing submicronic powders of zirconium oxide stabilized with yttrium oxide
US5660774A (en) * 1993-09-27 1997-08-26 Alfred University Process for making a sintered body from ultra-fine superconductive particles

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHANGRONG X ET AL: "Sol-gel synthesis of yttria stabilized zirconia membranes through controlled hydrolysis of zirconium alkoxide", JOURNAL OF MEMBRANE SCIENCE, ELSEVIER SCIENCE, AMSTERDAM, NL, vol. 162, no. 1-2, 1 September 1999 (1999-09-01), pages 181 - 188, XP004178895, ISSN: 0376-7388 *
METELKINA O ET AL: "Effects of the post-synthesis treatment on the structural properties of alumina-doped zirconia", JOURNAL OF NON-CRYSTALLINE SOLIDS, NORTH-HOLLAND PUBLISHING COMPANY, AMSTERDAM, NL, vol. 285, no. 1-3, June 2001 (2001-06-01), pages 64 - 70, XP004242903, ISSN: 0022-3093 *

Also Published As

Publication number Publication date
US20030086865A1 (en) 2003-05-08
AU2002367590A1 (en) 2003-09-22
CA2465505A1 (en) 2003-09-18
US6982073B2 (en) 2006-01-03
JP2005519020A (en) 2005-06-30
WO2003076337A2 (en) 2003-09-18
WO2003076337B1 (en) 2004-02-12
EP1440039A2 (en) 2004-07-28
AU2002367590B2 (en) 2008-03-20

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