公开(公告)号：US20210060654A1

公开(公告)日：2021-03-04

申请号：US16958150

申请日：2017-12-27

申请人： NINGXIA ORIENT TANTALUM INDUSTRY CO., LTD.

发明人： Haiyan MA ,  Hui LI ,  Guoqing LUO ,  Yuewei CHENG ,  Chunxia ZHAO ,  Xueqing CHEN ,  Zhidao WANG ,  Fukun LIN ,  Guoqi YANG ,  Ning WANG ,  Yinghui MA ,  Yanjie WANG ,  Lijun LI ,  Honggang ZHANG

IPC分类号： B22F9/20 ,  B22F1/00 ,  B22F3/10 ,  B22F9/04

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 ρ=150˜170; and the tantalum powder with high CV has a low leakage current and dielectric loss, and good moldability.

公开(公告)号：US20160059319A1

公开(公告)日：2016-03-03

申请号：US14763389

申请日：2013-12-10

申请人： NINGXIA ORIENT TANTALUM INDUSTRY CO., LTD. ,  NATIONAL ENGINEERING RESEARCH CENTER FOR SPECIAL METAL MATERIALS OF TANTALUM AND NIOBIUM.

发明人： Guoqi YANG ,  Aiguo ZHENG ,  Yuewei CHENG ,  Yuezhong MA

IPC分类号： B22F9/20 ,  B22F9/04 ,  H01G9/052 ,  H01G9/042 ,  H01G9/025 ,  C22C27/02 ,  C22B34/24

CPC分类号： B22F9/20 ,  B22F9/04 ,  B22F9/24 ,  C22B34/24 ,  C22C1/045 ,  C22C27/02 ,  H01G9/025 ,  H01G9/042 ,  H01G9/0525

摘要： A method for preparing a tantalum power of capacitor grade, comprising: solid tantalum nitride is added when potassium fluotantalate is reduced by sodium. The method increases the nitrogen content in the tantalum powder, and at the same time improves the electrical performance of the tantalum powder. The specific capacitance is increased, and the leakage current and loss is improved. The qualification rate of the anode and the capacitor product is also improved. The method is characterized in that the nitrogen in the tantalum nitride diffuses between the particles of the tantalum powder, with substantially no loss, and thus the nitrogen content is accurate and controllable.

摘要翻译： 一种用于制备电容器级钽电容的方法，包括：当用氯化钠降低钾时，加入固体氮化钽。 该方法增加了钽粉中的氮含量，同时提高了钽粉的电性能。 比电容增加，漏电流和损耗提高。 阳极和电容器产品的合格率也得到提高。 该方法的特征在于，氮化钽中的氮在钽粉末的颗粒之间扩散，基本上没有损失，因此氮含量是准确和可控的。

公开(公告)号：US20160314904A1

公开(公告)日：2016-10-27

申请号：US14767243

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： Guoqi YANG ,  Aiguo ZHENG ,  Xueqing CHEN ,  Fukun LIN

IPC分类号： H01G9/042 ,  B22F9/04

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： 一种用于提供具有块+块结构的钽粉末的方法，包括以下步骤：1）提供细粉钽粉，并将其分成第一部分和第二部分; 2）将钽粉末的第一部分放置在球磨机中进行球磨，在球磨和筛分之后取出粉末，得到一块钽粉末; 3）将钽粉末与钽粉末的第二部分混合以获得混合物，优选以片状形式的钽粉末和细粒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。 和4）在混合物上进行水洗，酸洗和结节化的步骤，最终得到具有块+块结构的钽粉末。