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1. 发明申请

WO2009026789A1 PROCESS FOR PREPARING POWDER OF NIOBIUM SUBOXIDES OR NIOBIUM 审中-公开
标题翻译：制备铌氧化物或铌的粉末的方法
公开(公告)号：WO2009026789A1
公开(公告)日：2009-03-05
申请号：PCT/CN2008/001522
申请日：2008-08-25
申请人： NINGXIA ORIENT TANTALUM INDUSTRY CO., LTD. , SHI, Wenfeng , XI, Xudong , LI, Yong , CHEN, Xueqing , WANG, Wei
发明人： SHI, Wenfeng , XI, Xudong , LI, Yong , CHEN, Xueqing , WANG, Wei
IPC分类号： C01G33/00 , B22F9/20
CPC分类号： C01G33/00 , B22F9/20 , B22F2998/10 , C01P2004/03 , C01P2006/10 , C01P2006/40 , C01P2006/80 , B22F1/0003 , B22F1/0085
摘要： The present invention relates to a process for preparing powders of niobium suboxides or niobium, wherein the process comprising: mixing the niobium oxides as raw material with reducing agent, conducting a reaction at a temperature in the range of 600~1300°C in an atmosphere of vacuum or inert gas or hydrogen gas, leaching the reaction product to remove the residual reducing agent and the oxides of the reducing agent and other impurities, heat treating at a temperature of the range of 1000~1600°C in an atmosphere of vacuum or inert gas, and screening to obtain the powders of niobium suboxide or niobium of capacitor grade. According to the present invention, the niobium oxides were directly reduced into capacitor grade niobium suboxides or niobium with reducing agents which can be easily removed by mineral acids, wherein the speed of the reaction can be controlled and the reaction can directly reduce the niobium oxides into capacitor grade niobium suboxides or niobium powder. According to the present invention, the process is simple with high yield and high productivity. The products obtained have good flowability, low impurities, uniform distribution of oxygen, and have good electrical properties.
摘要翻译：本发明涉及一种制备低氧化铌或铌粉末的方法，其中该方法包括：将作为原料的铌氧化物与还原剂混合，在气氛中在600〜1300℃的温度范围内进行反应的真空或惰性气体或氢气，浸出反应产物以除去残留的还原剂和还原剂的氧化物和其它杂质，在真空气氛中在1000〜1600℃的温度范围内进行热处理，或惰性气体，筛选得到电容器级的低氧化铌或铌粉末。根据本发明，铌氧化物通过还原剂直接还原成电容器级铌低氧化物或铌，其可以通过无机酸容易地除去，其中可以控制反应速度，反应可以直接将铌氧化物还原成电容器级铌粉或铌粉。根据本发明，该方法简单，产率高，生产率高。所得产品流动性好，杂质低，氧分布均匀，电性能好。

2. 发明授权

EP2446986B1 PROCESS FOR PREPARING TANTALUM POWDER FOR CAPACITORS 有权
公开(公告)号：EP2446986B1
公开(公告)日：2018-05-23
申请号：EP10791134.9
申请日：2010-03-31
申请人： Ningxia Orient Tantalum Industry Co., Ltd.
发明人： SHI, Wenfeng , CHEN, Xueqing , LI, Yong , XI, Xudong , GUO, Tao
IPC分类号： B22F9/20 , H01G9/052
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.

3. 发明公开

EP2446986A1 METHOD FOR PREPARING TANTALUM POWDER FOR CAPACITOR 有权
标题翻译： VERFAHREN ZUR HERSTELLUNG EINES TANTALUMPULVERSFÜRDEN KONDENSATOR
公开(公告)号：EP2446986A1
公开(公告)日：2012-05-02
申请号：EP10791134.9
申请日：2010-03-31
申请人： Ningxia Orient Tantalum Industry Co., Ltd.
发明人： SHI, Wenfeng , CHEN, Xueqing , LI, Yong , XI, Xudong , GUO, Tao
IPC分类号： B22F9/20
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.
摘要翻译：本发明提供一种制备高比容量的钽粉的方法，该方法包括以下步骤：（1）第一还原步骤：均匀混合氧化钽粉末和第一还原剂粉末，然后进行在氢气和/或惰性气体或真空气氛中还原反应，得到低氧化钽粉末; （2）第二还原步骤：将其中除去杂质的步骤（1）获得的低密度氧化钡粉末与均匀的第二还原剂粉末混合，然后在氢气和/或惰性气体中进行还原反应，或真空气氛，得到氧含量高的钽粉末; （3）第三还原步骤：将已经除去杂质的步骤（2）获得的具有高氧含量的钽粉末与第三还原剂粉末均匀混合，然后在氢气和/或惰性气体或真空气氛，得到适合电容器的钽金属粉末; 其中在每个还原步骤之后，从反应产物中除去还原剂和剩余还原剂的氧化产物。

4. 发明公开

EP3733325A1 TANTALUM POWDER AND PREPARATION METHOD THEREFOR 有权
公开(公告)号：EP3733325A1
公开(公告)日：2020-11-04
申请号：EP17936755.2
申请日：2017-12-28
申请人： Ningxia Orient Tantalum Industry Co., Ltd.
发明人： MA, Haiyan , LI, Hui , LUO, Guoqing , CHENG, Yuewei , ZHAO, Chunxia , CHEN, Xueqing , WANG, Zhidao , LIN, Fukun , YANG, Guoqi , WANG, Ning , MA, Yinghui , WANG, Yanjie , LI, Lijun , ZHANG, Honggang
IPC分类号： B22F1/00 , B22F5/00 , B22F9/00
摘要： A tantalum powder, a tantalum powder compact, a tantalum powder sintered body, a tantalum anode, an electrolytic capacitor and a preparation method for tantalum powder. The tantalum powder contains boron element, and the tantalum powder has a specific surface area of greater than or equal to 4 m 2 /g; the ratio of the boron content of the tantalum powder to the specific surface area of the tantalum powder is 2∼16; the boron content is measured in weight ppm, and the specific surface area is measured in m 2 /g; Powder that can pass through a p-mesh screen in the tantalum powder accounts for over 85% of the total weight of the tantalum powder, where ρ=150∼170; and the tantalum powder with high CV has a low leakage current and dielectric loss, and good moldability.

6. 发明公开

EP3112059A1 HIGH-PURITY TANTALUM POWDER AND PREPARATION METHOD THEREFOR 有权
标题翻译： HOCHREINES TANTALPULVER UND HERSTELLUNGSVERFAHRENDAFÜR
公开(公告)号：EP3112059A1
公开(公告)日：2017-01-04
申请号：EP14883916.0
申请日：2014-02-27
申请人： Ningxia Orient Tantalum Industry Co., Ltd.
发明人： LI, Zhongxiang , CHENG, Yuewei , CHEN, Xueqing , WANG, Ting , SHI, Dejun , TONG, Zekun , YAN, Yan , TIAN, Xiaoyu , ZHAO, Zhonghuan
IPC分类号： B22F9/20
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.
摘要翻译：本发明涉及一种高纯度钽粉及其制备方法。通过GDMS分析，钽粉的纯度大于99.995％。优选地，钽粉的氧含量不大于1000ppm，氮含量不大于50ppm，氢含量不超过20ppm，镁含量不大于5ppm，平均颗粒数直径D50小于25μm。

7. 发明公开

EP3089180A1 CAPACITOR GRADE HIGH SPECIFIC VOLUME TANTALUM POWDER IMPROVING ELECTRICAL PERFORMANCE AND PREPARATION METHOD THEREFOR 有权
标题翻译：具有高体积比来改善电力及其制造方法电容器钽粉
公开(公告)号：EP3089180A1
公开(公告)日：2016-11-02
申请号：EP13900179.6
申请日：2013-12-25
申请人： Ningxia Orient Tantalum Industry Co., Ltd. , National Engineering Research Center for Special Metal Materials of Tantalum and Niobium
发明人： YANG, Guoqi , ZHENG, Aiguo , CHEN, Xueqing , LIN, Fukun
IPC分类号： H01G9/042 , B22F9/04 , H01G9/15
CPC分类号： H01G9/042 , B22F1/0007 , B22F9/04 , B22F2009/043 , B22F2999/00 , H01G9/052 , H01G9/0525 , H01G9/15 , H01G2009/05 , Y10T428/12014 , Y10T428/12028 , Y10T428/12035 , Y10T428/12181 , 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 1:0.1∼1, preferably being 1:0.25∼0.8, and more preferably being 1:0.4∼0.6; 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：一种用于提供钽粉用一块+块结构，所述方法包括以下步骤：1）提供一种粒子状钽粉，以及将相同的为第一部分和第二部分; 2）投入球磨机中球磨钽粉末的第一部分，以将粉末从球磨后和筛分相同，并且在片的形式获得一个钽粉; 3）混合在一块和钽粉末的第二部分的形式的钽粉以获得混合物，并且优选地，钽粉末的混合比例在一个件和所述粒子状钽粉为1的形式：0.1 ¼1，优选为1：0.25¼0.8，并且更优选为1：0.4¼0.6; 以及4）对所述混合物水洗，酸洗，和球化的步骤，以最终得到用一块+嵌段结构的钽粉。

8. 发明公开

EP4379763A2 TANTALUM POWDER AND PREPARATION METHOD THEREFOR 审中-公开
公开(公告)号：EP4379763A2
公开(公告)日：2024-06-05
申请号：EP24163245.4
申请日：2017-12-28
申请人： Ningxia Orient Tantalum Industry Co., Ltd.
发明人： MA, Haiyan , LI, Hui , LUO, Guoqing , CHENG, Yuewei , ZHAO, Chunxia , CHEN, Xueqing , WANG, Zhidao , LIN, Fukun , YANG, Guoqi , WANG, Ning , MA, Yinghui , WANG, Yanjie , LI, Lijun , ZHANG, Honggang
IPC分类号： H01G9/052
CPC分类号： B22F9/24 , C22C1/045 , C22C27/02 , H01G9/042 , H01G9/0525 , H01G9/052 , H01G9/04 , B22F2998/1020130101 , B22F1/05 , B22F1/145 , B22F1/142 , B22F1/09
摘要： A tantalum powder, a tantalum powder compact, a tantalum powder sintered body, a tantalum anode, an electrolytic capacitor and a preparation method for tantalum powder. The tantalum powder contains boron element, and the tantalum powder has a specific surface area of greater than or equal to 4 m2/g; the ratio of the boron content of the tantalum powder to the specific surface area of the tantalum powder is 2~16; the boron content is measured in weight ppm, and the specific surface area is measured in m2/g; Powder that can pass through a ρ-mesh screen in the tantalum powder accounts for over 85% of the total weight of the tantalum powder, where p=150~170; and the tantalum powder with high CV has a low leakage current and dielectric loss, and good moldability.

9. 发明授权

EP3112059B1 PREPARATION OF HIGH-PURITY TANTALUM POWDER 有权
公开(公告)号：EP3112059B1
公开(公告)日：2020-01-15
申请号：EP14883916.0
申请日：2014-02-27
申请人： Ningxia Orient Tantalum Industry Co., Ltd.
发明人： LI, Zhongxiang , CHENG, Yuewei , CHEN, Xueqing , WANG, Ting , SHI, Dejun , TONG, Zekun , YAN, Yan , TIAN, Xiaoyu , ZHAO, Zhonghuan
IPC分类号： B22F9/04 , C22F1/18

10. 发明公开

EP3486338A1 FLAKY MICROCAPSULE AND METHOD FOR PREPARING SAME 有权
公开(公告)号：EP3486338A1
公开(公告)日：2019-05-22
申请号：EP16908436.5
申请日：2016-07-13
申请人： Ningxia Orient Tantalum Industry Co., Ltd.
发明人： CHEN, Xueqing , CHENG, Yuewei , MA, Yuezhong , LI, Zhongxiang , WANG, Zhidao , LI, Xia , SHI, Dejun , ZHAO, Zhonghuan
IPC分类号： C22B34/24 , B22F9/20
摘要： Provided are a flaked tantalum powder and method for preparation thereof; said flaked tantalum powder contains 300-1800ppm of nitrogen, 10-100ppm of phosphorus, and 1-40ppm of boron. The flaked tantalum powder has high capacity and low leakage current, good puncture-resistance, and particularly outstanding high-frequency attributes. Doping with nitrogen during oxygen reduction is performed before three thermal treatments are carried out; the solution of performing three thermal treatments and a subsequent process improves the uniformity of distribution of elemental nitrogen and makes up for the deficiency of an oxide film, thereby increasing the pressure resistance of the product, and especially its high-frequency attributes.

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