WO2006012279A3 - High capacitance tantalum flakes and methods of producing the same - Google Patents

High capacitance tantalum flakes and methods of producing the same Download PDF

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Publication number
WO2006012279A3
WO2006012279A3 PCT/US2005/022425 US2005022425W WO2006012279A3 WO 2006012279 A3 WO2006012279 A3 WO 2006012279A3 US 2005022425 W US2005022425 W US 2005022425W WO 2006012279 A3 WO2006012279 A3 WO 2006012279A3
Authority
WO
WIPO (PCT)
Prior art keywords
methods
producing
same
high capacitance
tantalum
Prior art date
Application number
PCT/US2005/022425
Other languages
French (fr)
Other versions
WO2006012279A2 (en
Inventor
Yongjian Qiu
Original Assignee
Cabot Corp
Yongjian Qiu
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 Cabot Corp, Yongjian Qiu filed Critical Cabot Corp
Priority to JP2007518303A priority Critical patent/JP2008504692A/en
Priority to DE112005001499T priority patent/DE112005001499T5/en
Publication of WO2006012279A2 publication Critical patent/WO2006012279A2/en
Publication of WO2006012279A3 publication Critical patent/WO2006012279A3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • 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
    • B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/06—Metallic powder characterised by the shape of the particles
    • B22F1/068—Flake-like particles
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/02—Alloys based on vanadium, niobium, or tantalum
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/04—Electrodes or formation of dielectric layers thereon
    • H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/04—Electrodes or formation of dielectric layers thereon
    • H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
    • H01G9/052—Sintered electrodes
    • H01G9/0525—Powder therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Abstract

Methods of maximizing a tantalum capacitor’s capacitance are disclosed, as well as tantalum flake powder and anodes. A two step milling process can be used to mill tantalum particles into tantalum flake powder having flakes of the desired thickness. This flake powder can then be pressed and sintered thereby forming an anode. Other flake capacitance methods and products are also disclosed.
PCT/US2005/022425 2004-06-28 2005-06-23 High capacitance tantalum flakes and methods of producing the same WO2006012279A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2007518303A JP2008504692A (en) 2004-06-28 2005-06-23 High capacitance tantalum flakes and production method thereof
DE112005001499T DE112005001499T5 (en) 2004-06-28 2005-06-23 High capacity flake-form tantalum and process for its preparation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58349804P 2004-06-28 2004-06-28
US60/583,498 2004-06-28

Publications (2)

Publication Number Publication Date
WO2006012279A2 WO2006012279A2 (en) 2006-02-02
WO2006012279A3 true WO2006012279A3 (en) 2006-03-02

Family

ID=35004322

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/022425 WO2006012279A2 (en) 2004-06-28 2005-06-23 High capacitance tantalum flakes and methods of producing the same

Country Status (5)

Country Link
US (1) US20060070492A1 (en)
JP (1) JP2008504692A (en)
CN (1) CN101010160A (en)
DE (1) DE112005001499T5 (en)
WO (1) WO2006012279A2 (en)

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JP2007273710A (en) * 2006-03-31 2007-10-18 Nichicon Corp Manufacturing method of element for solid electrolytic capacitors
JP2009536266A (en) * 2006-05-05 2009-10-08 キャボット コーポレイション Tantalum powder and method for producing the same
US7154742B1 (en) * 2006-05-10 2006-12-26 Kemet Electronics Corporation Fluted anode with improved capacitance and capacitor comprising same
US20080229880A1 (en) * 2007-03-23 2008-09-25 Reading Alloys, Inc. Production of high-purity tantalum flake powder
US20080233420A1 (en) * 2007-03-23 2008-09-25 Mccracken Colin G Production of high-purity tantalum flake powder
US8405956B2 (en) * 2009-06-01 2013-03-26 Avx Corporation High voltage electrolytic capacitors
US9105401B2 (en) 2011-12-02 2015-08-11 Avx Corporation Wet electrolytic capacitor containing a gelled working electrolyte
CN105026078B (en) * 2013-03-13 2017-10-24 凯米特电子公司 Low energy grinds to prepare flakelike powder
CN105051225A (en) * 2014-02-21 2015-11-11 宁夏东方钽业股份有限公司 Wet ball-milling method for tantalum powder and tantalum powder prepared therefrom
CN104858436B (en) * 2014-02-21 2018-01-16 宁夏东方钽业股份有限公司 The preparation method of highly reliable Fabrication of High Specific Capacitance electrolytic capacitor tantalum powder
CZ309286B6 (en) * 2014-11-03 2022-07-20 Ningxia Orient Tantalum Industry Co., Ltd Method of preparing tantalum powder
JP6716386B2 (en) * 2016-08-03 2020-07-01 太平洋セメント株式会社 Method for producing metallic tantalum particles
CN110234451B (en) 2017-01-17 2021-10-15 凯米特电子公司 Improved wire to anode connection
CN106847511B (en) * 2017-02-14 2018-11-23 中国科学院合肥物质科学研究院 A kind of high-ratio surface tantalum capacitor anodes tantalum foil and preparation method thereof
US11289276B2 (en) 2018-10-30 2022-03-29 Global Advanced Metals Japan K.K. Porous metal foil and capacitor anodes made therefrom and methods of making same
US20220080502A1 (en) * 2020-09-14 2022-03-17 Kemet Electronics Corporation Freeze Drying and Tumble Drying of Flake Powder
CN112620636B (en) * 2020-12-15 2021-09-03 江门富祥电子材料有限公司 Production method of high-pressure-resistant sheet-shaped tantalum powder

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WO1993003191A1 (en) * 1991-07-31 1993-02-18 Cabot Corporation Flaked tantalum powder and method of using same
US5261942A (en) * 1987-11-30 1993-11-16 Cabot Corporation Tantalum powder and method of making same

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US4441927A (en) * 1982-11-16 1984-04-10 Cabot Corporation Tantalum powder composition
US4520430A (en) * 1983-01-28 1985-05-28 Union Carbide Corporation Lead attachment for tantalum anode bodies
US4555268A (en) * 1984-12-18 1985-11-26 Cabot Corporation Method for improving handling properties of a flaked tantalum powder composition
US4574333A (en) * 1985-06-12 1986-03-04 Union Carbide Corporation Low density tantalum anode bodies
US4684399A (en) * 1986-03-04 1987-08-04 Cabot Corporation Tantalum powder process
US4940490A (en) * 1987-11-30 1990-07-10 Cabot Corporation Tantalum powder
US5580367A (en) * 1987-11-30 1996-12-03 Cabot Corporation Flaked tantalum powder and method of using same flaked tantalum powder
US5242481A (en) * 1989-06-26 1993-09-07 Cabot Corporation Method of making powders and products of tantalum and niobium
US5217526A (en) * 1991-05-31 1993-06-08 Cabot Corporation Fibrous tantalum and capacitors made therefrom
US5245514A (en) * 1992-05-27 1993-09-14 Cabot Corporation Extruded capacitor electrode and method of making the same
US5448447A (en) * 1993-04-26 1995-09-05 Cabot Corporation Process for making an improved tantalum powder and high capacitance low leakage electrode made therefrom
JP3801660B2 (en) * 1994-05-30 2006-07-26 ローム株式会社 Method for manufacturing capacitor element for tantalum solid electrolytic capacitor
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WO1993003191A1 (en) * 1991-07-31 1993-02-18 Cabot Corporation Flaked tantalum powder and method of using same

Also Published As

Publication number Publication date
CN101010160A (en) 2007-08-01
DE112005001499T5 (en) 2007-05-10
JP2008504692A (en) 2008-02-14
WO2006012279A2 (en) 2006-02-02
US20060070492A1 (en) 2006-04-06

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