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    Methods for spherically granulating and agglomerating metal particles, and the metal particles prepared thereby, anodes made from the metal patricles
    2.
    发明授权
    Methods for spherically granulating and agglomerating metal particles, and the metal particles prepared thereby, anodes made from the metal patricles 有权
    用于球形球化和附聚金属颗粒的方法以及由此制备的金属颗粒，由金属颗粒制成的阳极

    公开(公告)号：US07666247B2

    公开(公告)日：2010-02-23

    申请号：US11356723

    申请日：2006-02-17

    申请人： Jilin He ,  Luntao Pan ,  Aiguo Zheng ,  Yuewei Cheng ,  Yuezhong Ma ,  Hongdong Liu ,  Guoqi Yang ,  Chunxiang Wang ,  Yanping Wang ,  Shiping Zheng

    发明人： Jilin He ,  Luntao Pan ,  Aiguo Zheng ,  Yuewei Cheng ,  Yuezhong Ma ,  Hongdong Liu ,  Guoqi Yang ,  Chunxiang Wang ,  Yanping Wang ,  Shiping Zheng

    IPC分类号： B22F1/00

    CPC分类号： B22F1/0096 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  H01G9/0525 ,  B22F9/22 ,  B22F9/023 ,  B22F1/0014 ,  B22F1/0048 ,  B22F1/0055 ,  B22F1/0085 ,  B22F2201/20 ,  B22F9/04 ,  B22F2009/042

    摘要： A method for spherically granulating and agglomerating metal particles such as tantalum and/or niobium powders is described in the present invention, which includes the steps of: a). comminuting the metal particles to form fine particles having D50 less than 50 μm; b). granulating the comminuted metal particles comprising volatile liquid, for example, tantalum and/or niobium particles comprising volatile liquid, to form wet spherical particles; c). still drying the wet spherical particles and removing volatile liquid to form flowable pre-agglomerated particles with increased bulk density; d). heat treating the pre-agglomerated particles; e). screening the heat treated powder to obtain the flowable agglomerated particles. The present invention provides a flowable spherical agglomerated metal particles, and especially tantalum and/or niobium particles having improved properties. The present agglomerated tantalum powder have a flow rate of at least about 2.0 g/sec, a BET surface area of from about 0.2 to about 6.0 m2/g, a FSSS of at least 1.0 μm, a Scott bulk density of from about 1.2 g/cm3 to about 5.5 g/cm3. The present agglomerated niobium powder have a flow rate of at least about 1.0 g/sec, a BET surface area of from about 0.5 to about 8.0 m2/g, a FSSS of at least 1.0 μm, a Scott bulk density of from about 0.7 g/cm3 to about 3.5 g/cm3. Said tantalum and/or niobium metal particles have improved pore size distribution of the sintered anodes and increased pellet crush strength. The present invention further provides an electrolytic capacitor anodes made from the tantalum and/or niobium particles according to the present invention having a capacitance of from about 5,000 μFV/g to about 300,000 μFV/g.

    摘要翻译： 在本发明中描述了一种用于球形造粒和附聚如钽和/或铌粉末的金属颗粒的方法，其包括以下步骤：a）。 粉碎金属颗粒以形成D50小于50μm的细颗粒; b）。 将包含挥发性液体的粉碎金属颗粒，例如包含挥发性液体的钽和​​/或铌颗粒造粒，以形成湿球形颗粒; C）。 仍然干燥湿球形颗粒并除去挥发性液体以形成具有增加堆积密度的可流动的预凝聚颗粒; d）。 热处理预凝聚的颗粒; e）。 筛选热处理粉末以获得可流动的附聚颗粒。 本发明提供了一种可流动的球形附聚金属颗粒，特别是具有改进性能的钽和/或铌颗粒。 本发明的聚集的钽粉末的流速为至少约2.0g / sec，BET表面积为约0.2至约6.0m 2 / g，FSSS为至少1.0μm，Scott堆积密度为约1.2g cm 3至约5.5g / cm 3。 本发明的聚结铌粉末的流速为至少约1.0g / sec，BET表面积为约0.5至约8.0m 2 / g，FSSS为至少1.0μm，Scott堆积密度为约0.7g cm 3至约3.5g / cm 3。 所述钽和/或铌金属颗粒具有改善的烧结阳极的孔径分布和增加的颗粒粉碎强度。 本发明还提供一种由本发明的钽和/或铌颗粒制成的具有约5,000μFV/ g至约300,000μFV/ g电容的电解电容器阳极。