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公开(公告)号：EP3112059A4
公开(公告)日：2017-11-15
申请号：EP14883916
申请日：2014-02-27
发明人： LI ZHONGXIANG , CHENG YUEWEI , CHEN XUEQING , WANG TING , SHI DEJUN , TONG ZEKUN , YAN YAN , TIAN XIAOYU , ZHAO ZHONGHUAN
CPC分类号： B22F1/0003 , B22F9/023 , B22F9/04 , B22F9/16 , B22F2009/043 , B22F2301/20 , B22F2304/10 , B22F2998/10 , C22F1/18 , C23G1/00
摘要： The present invention relates to a high-purity tantalum powder and a preparation method therefore. The tantalum powder has a purity of more than 99.995%, as analyzed by GDMS. Preferably, the tantalum powder has an oxygen content of not more than 1000 ppm, a nitrogen content of not more than 50 ppm, a hydrogen content of not more than 20 ppm, a magnesium content of not more than 5 ppm, and an average particle diameter D50 of less than 25 µm.
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2.发明公开
公开(公告)号：EP3095540A4
公开(公告)日：2017-11-01
申请号：EP15752366
申请日：2015-02-15
发明人： LI ZHONGXIANG , CHENG YUEWEI , SHI DEJUN , DONG XUECHENG , WANG TING , WANG ZHIDAO , WEI JUNXIANG
CPC分类号： B22F1/0055 , B22F1/0085 , B22F1/0088 , B22F1/0096 , B22F9/04 , B22F2009/042 , B22F2009/043 , B22F2009/045 , B22F2301/20 , B22F2998/10 , C22F1/18 , H01G9/042 , H01G9/052 , H01G9/0525
摘要： The present invention provides a process for preparing tantalum powders for use in an electrolytic capacitor with high reliability and high specific capacitance, characterized in that the ratio of the average particle size of raw tantalum powders to the average particle size of tantalum flake powders is 0.5-25, preferably 1.5-10, more preferably 2-5. The process of the present invention is simple and has good controllability, the tantalum flake powder obtained has low content of metal impurities, high specific surface area, and after agglomerated, have good flowability and moldability, have high specific capacitance, and when used under high voltage, have low leakage current and high breakdown voltage.
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3.发明公开
公开(公告)号：EP2390886A4
公开(公告)日：2018-03-28
申请号：EP09838599
申请日：2009-05-21
发明人： ZHAO BING , DU LINGHUI , XIE YONGXU , WAN QINGFENG , WANG HUIFENG , QIU GUOHUA
CPC分类号： H01G9/0029 , B21C23/002 , B21C37/047 , B22F3/24 , B22F5/12 , B22F2998/10 , B22F2999/00 , C22C1/045 , H01G9/012 , H01G9/048 , H01G9/052 , H05K2201/1081 , Y10T29/49204 , B22F3/02 , B22F2003/248 , B22F3/18 , B22F2201/03
摘要： The present invention relates to a tantalum wire for anode lead of tantalum capacitors, characterized in that the cross section of the tantalum wire is approximate rectangular or regular rectangular. The present invention also relates to a process for manufacturing the tantalum wire, comprising the steps of: providing feedstock tantalum wire; subjecting the feedstock tantalum wire to heat treatment; subjecting the heat treated tantalum wire to surface pretreatment to form an oxide membrane on the surface-pretreated tantalum wire; rolling the surface-pretreated tantalum wire by lubricating with lubricant oil to make the cross section of the rolled tantalum wire being approximate rectangular or regular rectangular; subjecting the tantalum wire to final annealing.
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4.发明公开CAPACITOR GRADE HIGH SPECIFIC VOLUME TANTALUM POWDER IMPROVING ELECTRICAL PERFORMANCE AND PREPARATION METHOD THEREFOR 审中-公开KONDENSATOR-TANTALPULVER MIT EINEM HOHEN SPEZIFISCHEN VOLUMEN ZUR VERBESSERUNG EINER ELEKTRISCHEN LEISTUNG UND HERSTELLUNGSVERFAHRENDAFÜR
公开(公告)号：EP3089180A4
公开(公告)日：2017-08-23
申请号：EP13900179
申请日：2013-12-25
申请人： NINGXIA ORIENT TANTALUM IND CO LTD , NAT ENG RES CENTER FOR SPECIAL METAL MAT OF TANTALUM AND NIOBIUM
发明人： YANG GUOQI , ZHENG AIGUO , CHEN XUEQING , LIN FUKUN
CPC分类号： H01G9/042 , B22F1/0007 , B22F9/04 , B22F2009/043 , B22F2999/00 , H01G9/052 , H01G9/0525 , H01G9/15 , H01G2009/05 , B22F1/0048 , B22F1/0055
摘要： A method for providing a tantalum powder with a piece + block structure, comprising the following steps: 1) providing a granulous tantalum powder, and dividing same into a first part and a second part; 2) putting the first part of the tantalum powder in a ball mill for ball milling, taking the powder out after the ball milling and sieving same, and obtaining a tantalum powder in the form of a piece; 3) mixing the tantalum powder in the form of a piece and the second part of the tantalum powder to obtain a mixture, and preferably, the mixing proportion of the tantalum powder in the form of a piece and the granulous tantalum powder being 1:0.1ˆ¼1, preferably being 1:0.25ˆ¼0.8, and more preferably being 1:0.4ˆ¼0.6; and 4) performing the steps of water washing, acid washing, and nodularization on the mixture to finally obtain a tantalum powder with a piece + block structure.
摘要翻译： 一种提供具有块+块结构的钽粉的方法，包括以下步骤：1）提供粒状钽粉，并将其分成第一部分和第二部分; 2）将第一部分钽粉放入球磨机中进行球磨，球磨后将粉末取出并筛分，得到一块钽粉; 3）将钽粉末与钽粉末的第二部分混合得到混合物，优选钽粉末与钽粉末的混合比例为1:0.1 = 1，优选为1：0.25 = 0.8，更优选为1：0.4 = 0.6; 4）对混合物进行水洗，酸洗和球化，最终得到块状+块状结构的钽粉。
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公开(公告)号：EP2446986A4
公开(公告)日：2016-12-28
申请号：EP10791134
申请日：2010-03-31
发明人： SHI WENFENG , CHEN XUEQING , LI YONG , XI XUDONG , GUO TAO
CPC分类号： C01G35/00 , B22F9/20 , B22F2998/10 , B22F2999/00 , C01P2004/03 , C01P2004/62 , C01P2006/10 , C01P2006/12 , C01P2006/40 , H01G9/0029 , H01G9/0525 , B22F2201/013 , B22F2201/20 , B22F2201/10 , B22F1/0096
摘要： The present invention provides a process for preparing a tantalum powder with high specific capacity, which process comprising the steps of, in sequence, (1) a first reduction step: mixing tantalum oxide powder and a first reducing agent powder homogenously, and then carrying out reduction reaction in hydrogen and/or inert gas or vacuum atmosphere to obtain a tantalum suboxides powder; (2) a second reduction step: mixing the tantalum suboxides powder obtained from the step (1), in which impurities have been removed, and a second reducing agent powder homogenously, and then carrying out reduction reaction in hydrogen and/or inert gas or vacuum atmosphere to obtain a tantalum powder having high oxygen content; (3) a third reduction step: mixing the tantalum powder having high oxygen content obtained from the step (2), in which impurities have been removed, with a third reducing agent powder homogenously, and then carrying out reduction reaction in hydrogen and/or inert gas or vacuum atmosphere to obtain a tantalum metal powder suitable for capacitors; wherein after each reduction step, the oxidation product of reducing agent and the residual reducing agent are removed from the reaction product.
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6.发明公开
公开(公告)号：EP3184205A4
公开(公告)日：2018-04-11
申请号：EP14900092
申请日：2014-08-20
申请人： NINGXIA ORIENT TANTALUM IND CO LTD , NATIONAL ENGINEERING RES CENTER FOR SPECIAL METAL MATERIALS OF TANTALUM AND NIOBIUM
发明人： YANG GUOQI , ZHENG AIGUO , MA YUEZHONG
CPC分类号： B22F1/0055 , B22F1/00 , B22F1/0085 , B22F1/0088 , B22F1/0096 , B22F9/02 , B22F9/04 , B22F9/16 , B22F9/22 , B22F2301/20 , B22F2998/10 , C22F1/18 , H01G9/00 , H01G9/0029 , H01G9/042 , H01G2009/05
摘要： The present invention relates to a composite tantalum powder and a process for preparing the same, and to a capacitor anode prepared from the tantalum powder. The method for preparing a composite tantalum powder comprises the following steps of: 1) providing a tantalum powder prepared by a reduction process, and flattening the tantalum powder so as to prepare a flaked tantalum powder; 2) providing a granular tantalum powder prepared from tantalum ingot; 3) mixing the flaked tantalum powder and the granular tantalum powder to give a tantalum powder mixture; and 4) thermally treating the tantalum powder mixture, and then pulverizing, screening to give a composite tantalum powder. The present invention further relates to a composite tantalum powder prepared from the process and the use thereof in a capacitor.
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公开(公告)号：EP2237910A4
公开(公告)日：2018-03-14
申请号：EP08869307
申请日：2008-10-13
发明人： LI BIN , PAN LUNTAO , PAN LUNTAO , ZHENG AIGUO , MA YUEZHONG , CHENG YUEWEI , DONG XUECHENG , ZHANG XUEQING , WANG ZHIDAO , ZHU BAOJUN
CPC分类号： H01G9/042 , B22F2998/10 , B22F2999/00 , C22C1/045 , H01G9/0029 , H01G9/052 , H01G9/0525 , B22F9/22 , B22F1/0085 , B22F2201/02
摘要： The present invention relates to valve metal particles uniformly containing nitrogen and a method for preparing the same, and a valve metal green pellet and a sintered pellet made from the particles, and an electrolytic capacitor anode. The present invention provides valve metal particles uniformly containing nitrogen, wherein the difference ratio of nitrogen contents of particles is 20% or less. The present invention provides a process for preparing said valve metal particles uniformly containing nitrogen, wherein the raw material particles of the valve metal were heated in a nitrogen-containing gas at a temperature of 200° C. or less for 2 hours or more. The present invention also provides a valve metal green pellet made from said valve metal particles. The present invention also provides a valve metal sintered pellet.
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