GB2421945A - A process for the production of niobium oxide power for use in capacitors - Google Patents

A process for the production of niobium oxide power for use in capacitors Download PDF

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Publication number
GB2421945A
GB2421945A GB0605986A GB0605986A GB2421945A GB 2421945 A GB2421945 A GB 2421945A GB 0605986 A GB0605986 A GB 0605986A GB 0605986 A GB0605986 A GB 0605986A GB 2421945 A GB2421945 A GB 2421945A
Authority
GB
United Kingdom
Prior art keywords
niobium
nbo
capacitors
production
nbo2
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB0605986A
Other versions
GB0605986D0 (en
Inventor
Solon Yasuhiko Tagusagawa
Alberto Akikazu Ono
Flavio Neto Beneduce
Jo O Batista Neto Ferreira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBMM SA
Companhia Brasileira de Metalurgia e Mineracao
Instituto de Pesquisa Tecnologicas do Estado Sao Paulo S/A (IPT)
Original Assignee
CBMM SA
Companhia Brasileira de Metalurgia e Mineracao
Instituto de Pesquisa Tecnologicas do Estado Sao Paulo S/A (IPT)
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 CBMM SA, Companhia Brasileira de Metalurgia e Mineracao, Instituto de Pesquisa Tecnologicas do Estado Sao Paulo S/A (IPT) filed Critical CBMM SA
Publication of GB0605986D0 publication Critical patent/GB0605986D0/en
Publication of GB2421945A publication Critical patent/GB2421945A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G33/00—Compounds of niobium
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
    • 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
    • C01P2006/14—Pore volume
    • 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
    • C01P2006/40—Electric properties
    • 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
    • C01P2006/80—Compositional purity

Abstract

The present invention is related to a process for the production of a powder of niobium monoxide (NbO) having a high purity, large specific surface area, controlled oxygen and nitrogen contents and a morphology adequate for use in the manufacture of capacitors, characterized by comprising two niobium pentoxide (Nb2O5) reduction steps, the first step comprising reducing, by hydrogen, the niobium pentoxide (Nb2O5) to niobium dioxide (NbO2), and the second step comprising reducing niobium dioxide (NbO2) to niobium monoxide (NbO), by using an oxygen getter material in a convenient atmosphere which permits the transfer of oxygen atoms from the niobium oxide (NbO2) to the getter material, under adequate conditions of time and temperature to form niobium monoxide (NbO). The particles of powder of niobium monoxide (NbO) produced using the instant process are small, have a large surface area and an appropriate morphology, and are adequate for the production of capacitors.

Description

GB 2421945 A continuation (71) cont IPT-Instituto De PesquisasTecnologicas
Do Estado De Sao Paulo, S/A (Incorporated in Brazil) Cidade Universitaria, "Armando de Salles Oliveira", 05508-901 SAO PAULO, SP, Brazil (72) Inventor(s): Solon Yasuhiko Tagusagawa Alberto Akikazu Ono Flávio Neto Beneduce Joâo Batista Neto Ferreira (74) Agent and/or Address for Service: Page White & Farrer 54 Doughty Street, LONDON, WC1N 2L5, United Kingdom
GB0605986A 2003-09-25 2004-01-23 A process for the production of niobium oxide power for use in capacitors Withdrawn GB2421945A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR0304252A BR0304252B1 (en) 2003-09-25 2003-09-25 production process of niobium monoxide powder, niobium monoxide, and capacitor.
PCT/BR2004/000003 WO2005028370A1 (en) 2003-09-25 2004-01-23 A process for the production of niobium oxide power for use in capacitors

Publications (2)

Publication Number Publication Date
GB0605986D0 GB0605986D0 (en) 2006-05-03
GB2421945A true GB2421945A (en) 2006-07-12

Family

ID=34318717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0605986A Withdrawn GB2421945A (en) 2003-09-25 2004-01-23 A process for the production of niobium oxide power for use in capacitors

Country Status (6)

Country Link
JP (1) JP2007506634A (en)
CN (1) CN1856446A (en)
BR (1) BR0304252B1 (en)
DE (1) DE112004001796T5 (en)
GB (1) GB2421945A (en)
WO (1) WO2005028370A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602006005483D1 (en) * 2005-06-03 2009-04-16 Starck H C Gmbh NIOBIUMSUBOXIDE
JPWO2008001774A1 (en) * 2006-06-26 2009-11-26 三井金属鉱業株式会社 Niobium oxide production method and niobium monoxide
JP5046572B2 (en) 2006-06-26 2012-10-10 三井金属鉱業株式会社 Niobium monoxide
US8040660B2 (en) * 2007-07-18 2011-10-18 Cabot Corporation High voltage niobium oxides and capacitors containing same
CN100577574C (en) * 2007-08-25 2010-01-06 宁夏东方钽业股份有限公司 Method for preparing low chemical valence niobium oxide or niobium powder
CN108046323B (en) * 2017-12-20 2019-08-02 广东省稀有金属研究所 A kind of preparation method of niobium oxide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6391275B1 (en) * 1998-09-16 2002-05-21 Cabot Corporation Methods to partially reduce a niobium metal oxide and oxygen reduced niobium oxides
US6416730B1 (en) * 1998-09-16 2002-07-09 Cabot Corporation Methods to partially reduce a niobium metal oxide oxygen reduced niobium oxides
US20030104923A1 (en) * 2001-05-15 2003-06-05 Showa Denko K.K. Niobium oxide powder, niobium oxide sintered body and capacitor using the sintered body
WO2004042095A1 (en) * 2002-11-04 2004-05-21 Companhia Brasileira De Metalurgia E Mineração - Cbmm A process for the production of niobium and/or tantalum powder with large surface area

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6391275B1 (en) * 1998-09-16 2002-05-21 Cabot Corporation Methods to partially reduce a niobium metal oxide and oxygen reduced niobium oxides
US6416730B1 (en) * 1998-09-16 2002-07-09 Cabot Corporation Methods to partially reduce a niobium metal oxide oxygen reduced niobium oxides
US20030104923A1 (en) * 2001-05-15 2003-06-05 Showa Denko K.K. Niobium oxide powder, niobium oxide sintered body and capacitor using the sintered body
WO2004042095A1 (en) * 2002-11-04 2004-05-21 Companhia Brasileira De Metalurgia E Mineração - Cbmm A process for the production of niobium and/or tantalum powder with large surface area

Also Published As

Publication number Publication date
GB0605986D0 (en) 2006-05-03
CN1856446A (en) 2006-11-01
WO2005028370A1 (en) 2005-03-31
BR0304252A (en) 2005-05-31
DE112004001796T5 (en) 2006-09-07
JP2007506634A (en) 2007-03-22
BR0304252B1 (en) 2013-05-14

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Legal Events

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