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    • 2. 发明公开
    • 아산화 니오븀 또는 니오븀의 분말을 제조하는 방법
    • 制备铌氧化物或铌的粉末的方法
    • KR1020100058529A
    • 2010-06-03
    • KR1020107004927
    • 2008-08-25
    • 닝시아 오리엔트 탄탈럼 인더스트리 코포레이션 엘티디
    • 시,웬펑시,쉬동리,용천,쉬에칭왕,웨이
    • C01G33/00B22F9/20H01G9/07H01B3/10
    • C01G33/00B22F9/20B22F2998/10C01P2004/03C01P2006/10C01P2006/40C01P2006/80B22F1/0003B22F1/0085
    • 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.
    • 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。
    • 9. 发明公开
    • 금속 입자의 구형 입상화 및 응집화 방법 및 상기 방법으로제조된 금속 입자, 상기 금속 입자로부터 제조된 애노드
    • 金属颗粒的球形颗粒和金属颗粒的制备方法,金属颗粒制成的阳离子
    • KR1020080003314A
    • 2008-01-07
    • KR1020077020910
    • 2006-01-27
    • 닝시아 오리엔트 탄탈럼 인더스트리 코포레이션 엘티디
    • 허지린판룬타오정아이구오청위에웨이마위에종리우홍동양구오치왕춘시앙왕옌핑정스핑
    • B22F1/00B22F9/00H01G9/042
    • B22F1/0096B22F2998/00B22F2998/10B22F2999/00H01G9/0525B22F9/22B22F9/023B22F1/0014B22F1/0048B22F1/0055B22F1/0085B22F2201/20B22F9/04B22F2009/042
    • 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 mum: 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 m^2/g, a FSSS of at least 1.0 mum, a Scott bulk density of from about 1.2 g/cm^3 to about 5.5 g/cm^3. 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 m^2/g, a FSSS of at least 1.0 mum, a Scott bulk density of from about 0.7 g/cm^3 to about 3.5 g/cm^3. 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 5,000muFV/g to about 300,000muFV/g.
    • 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根据本发明的钽和/或铌颗粒制成的电容器阳极,其电容为约5,000mFF / g至约300,000muFV / g。