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公开(公告)号：US07431751B2
公开(公告)日：2008-10-07
申请号：US10953163
申请日：2004-09-29
IPC分类号： B22F9/20
摘要： A method of producing a refractory metal powder that includes providing a metal powder containing magnesium tantalate or magnesium niobate; and heating the powder in an inert atmosphere in the presence of magnesium, calcium and/or aluminum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder and/or heating the powder under vacuum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder, the heating steps being performed in any order. The metal powder can be formed into pellets at an appropriate sintering temperature, which can be formed into electrolytic capacitors.
摘要翻译： 一种制造难熔金属粉末的方法，其包括提供含有钽酸镁或铌酸镁的金属粉末; 并在镁，钙和/或铝的存在下在惰性气氛中加热粉末至足以从粉末中除去钽酸镁或铌酸镁的温度和/或在真空下加热粉末至足以除去钽酸镁或 从粉末中获得铌酸镁，加热步骤以任何顺序进行。 金属粉末可以在可以形成为电解电容器的适当烧结温度下形成粒料。
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公开(公告)号：US07399335B2
公开(公告)日：2008-07-15
申请号：US11085876
申请日：2005-03-22
IPC分类号： B22F9/22
摘要： A method of preparing primary refractory metals (e.g., primary tantalum metal) by contacting a particulate refractory metal oxide (e.g., tantalum pentoxide) with a heated gas (e.g., a plasma), is described. The heated gas comprises hydrogen gas. The temperature range of the heated gas and the mass ratio of hydrogen gas to refractory metal oxide are each selected such that: (i) the heated gas comprises atomic hydrogen; (ii) the refractory metal oxide feed material is substantially thermodynamically stabilized (i.e., the concurrent formation of suboxides that are not reduced by atomic hydrogen is minimized); and (iii) the refractory metal oxide is reduced by contact with the heated gas, thereby forming primary refractory metal (e.g., primary tantalum metal and/or primary niobium metal).
摘要翻译： 描述了通过使颗粒状难熔金属氧化物（例如五氧化二钽）与加热气体（例如等离子体）接触来制备初级难熔金属（例如，初级钽金属）的方法。 加热气体包括氢气。 加热气体的温度范围和氢气与难熔金属氧化物的质量比各自选择为：（i）加热气体包括原子氢; （ii）难熔金属氧化物进料基本上是热力学稳定的（即，不会被原子氢还原的低氧化物的同时形成最小化）; 和（iii）难熔金属氧化物通过与加热的气体接触而被还原，从而形成初级难熔金属（例如，初级钽金属和/或初级铌金属）。
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3.发明授权Production of valve metal powders with improved physical and electrical properties 有权具有改善的物理和电学性能的阀门金属粉末的生产公开(公告)号：US08951329B2
公开(公告)日：2015-02-10
申请号：US11629540
申请日：2005-06-21
CPC分类号： B22F1/0007 , B22F1/0088 , B22F1/0096 , B22F9/20 , B22F2998/00 , H01G9/0525 , B22F9/22 , B22F1/0011
摘要： The invention relates to a process that involves (1) feeding (a) a first valve metal powder component containing valve metal particles and (b) reducing component into a reactor having a hot zone; and (2) subjecting the first valve metal powder component and the reducing component to non-static conditions sufficient to simultaneously (i) agglomerate the first valve metal powder component particles, and (ii) reduce oxygen content in the valve metal powder component particles, and thereby form a second valve metal powder component containing oxygen-reduced valve metal particles, in which the reducing component is selected from the group consisting of magnesium reducing components, calcium reducing components, aluminum reducing components, lithium reducing components, barium reducing components, strontium, reducing components, and combinations thereof.
摘要翻译： 本发明涉及一种方法，其包括（1）将含有阀金属颗粒的第一阀金属粉末组分和（b）还原组分进料到具有热区的反应器中; 和（2）使第一阀金属粉末组分和还原组分经受足以同时（i）使第一阀金属粉末组分颗粒聚结的非静态条件，和（ii）降低阀金属粉末组分颗粒中的氧含量， 从而形成包含减氧阀金属颗粒的第二阀金属粉末组分，其中还原组分选自镁还原组分，减钙组分，还原铝还原组分，还原组分，还原钡组分，锶 ，还原成分及其组合。
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公开(公告)号：US20080105082A1
公开(公告)日：2008-05-08
申请号：US11576320
申请日：2005-09-19
CPC分类号： B22F9/20 , B22F2999/00 , H01G9/0525 , B22F2201/10 , B22F2201/20
摘要： A method of producing a refractory metal powder that includes providing a metal powder containing magnesium tantalate or magnesium niobate; and heating the powder in an inert atmosphere in the presence of magnesium, calcium and/or aluminum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder and/or heating the powder under vacuum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder, the heating steps being performed in any order. The metal powder can be formed into pellets at an appropriate sintering temperature, which can be formed into electrolytic capacitors.
摘要翻译： 一种制造难熔金属粉末的方法，其包括提供含有钽酸镁或铌酸镁的金属粉末; 并在镁，钙和/或铝的存在下在惰性气氛中加热粉末至足以从粉末中除去钽酸镁或铌酸镁的温度和/或在真空下加热粉末至足以除去钽酸镁或 从粉末中获得铌酸镁，加热步骤以任何顺序进行。 金属粉末可以在可以形成为电解电容器的适当烧结温度下形成粒料。
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5.发明申请Production of valve metal powders with improved physical and electrical properties 有权具有改善的物理和电学性能的阀门金属粉末的生产公开(公告)号：US20070180952A1
公开(公告)日：2007-08-09
申请号：US11629540
申请日：2005-06-21
IPC分类号： B22F9/20
CPC分类号： B22F1/0007 , B22F1/0088 , B22F1/0096 , B22F9/20 , B22F2998/00 , H01G9/0525 , B22F9/22 , B22F1/0011
摘要： The invention relates to a process that involves (1) feeding (a) a first valve metal powder component containing valve metal particles and (b) reducing component into a reactor having a hot zone; and (2) subjecting the first valve metal powder component and the reducing component to non-static conditions sufficient to simultaneously (i) agglomerate the first valve metal powder component particles, and (ii) reduce oxygen content in the valve metal powder component particles, and thereby form a second valve metal powder component containing oxygen-reduced valve metal particles, in which the reducing component is selected from the group consisting of magnesium reducing components, calcium reducing components, aluminum reducing components, lithium reducing components, barium reducing components, strontium, reducing components, and combinations thereof.
摘要翻译： 本发明涉及一种方法，其包括（1）将含有阀金属颗粒的第一阀金属粉末组分和（b）还原组分进料到具有热区的反应器中; 和（2）使第一阀金属粉末组分和还原组分经受足以同时（i）使第一阀金属粉末组分颗粒聚结的非静态条件，和（ii）降低阀金属粉末组分颗粒中的氧含量， 从而形成包含减氧阀金属颗粒的第二阀金属粉末组分，其中还原组分选自镁还原组分，减钙组分，还原铝还原组分，还原组分，还原钡组分，锶 ，还原成分及其组合。
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公开(公告)号：US20070107549A1
公开(公告)日：2007-05-17
申请号：US11591137
申请日：2006-11-01
IPC分类号： B22F9/22
CPC分类号： H01G9/0525 , B22F1/0014 , B22F9/20 , B22F2998/00 , C01G23/043 , C01G31/02 , C01G33/00 , C01G37/02 , C01G39/02 , C01G41/02 , C01P2004/03 , C01P2004/50 , C01P2004/52 , C01P2004/61 , C01P2004/62 , C01P2006/10 , C01P2006/11 , C01P2006/12 , C01P2006/14 , C01P2006/17 , C01P2006/34 , C01P2006/40 , C01P2006/80 , H01G9/04 , H01G9/052 , B22F1/0096 , B22F2201/40 , B22F2201/11
摘要： High purity refractory metals, valve metals, refractory metal oxides, valve metal oxides, or alloys thereof suitable for a variety of electrical, optical and mill product/fabricated parts usages are produced from their respective oxides by metalothermic reduction of a solid or liquid form of such oxide using a reducing agent that establishes (after ignition) a highly exothermic reaction, the reaction preferably taking place in a continuously or step-wise moving oxide such as gravity fall with metal retrievable at the bottom and an oxide of the reducing agent being removable as a gas or in other convenient form and unreacted reducing agent derivatives being removable by leaching or like process.
摘要翻译： 适用于各种电气，光学和制造产品/制造部件的高纯度难熔金属，阀金属，难熔金属氧化物，阀金属氧化物或其合金用途是通过其各自的氧化物通过固体或液体形式的金属热还原 这种氧化物使用建立（点燃后）高度放热反应的还原剂，反应优选在连续或逐步移动的氧化物如重力中发生，金属在底部可回收，还原剂的氧化物是可除去的 作为气体或以其他方便的形式，并且未反应的还原剂衍生物可通过浸出或类似方法除去。
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公开(公告)号：US20060213327A1
公开(公告)日：2006-09-28
申请号：US11085876
申请日：2005-03-22
申请人： Leonid Shekhter , Leah Simkins , Hugh Greville , Leonid Lanin
发明人： Leonid Shekhter , Leah Simkins , Hugh Greville , Leonid Lanin
IPC分类号： B22F9/22
摘要： A method of preparing primary refractory metals (e.g., primary tantalum metal) by contacting a particulate refractory metal oxide (e.g., tantalum pentoxide) with a heated gas (e.g., a plasma), is described. The heated gas comprises hydrogen gas. The temperature range of the heated gas and the mass ratio of hydrogen gas to refractory metal oxide are each selected such that: (i) the heated gas comprises atomic hydrogen; (ii) the refractory metal oxide feed material is substantially thermodynamically stabilized (i.e., the concurrent formation of suboxides that are not reduced by atomic hydrogen is minimized); and (iii) the refractory metal oxide is reduced by contact with the heated gas, thereby forming primary refractory metal (e.g., primary tantalum metal and/or primary niobium metal).
摘要翻译： 描述了通过使颗粒状难熔金属氧化物（例如五氧化二钽）与加热气体（例如等离子体）接触来制备初级难熔金属（例如，初级钽金属）的方法。 加热气体包括氢气。 加热气体的温度范围和氢气与难熔金属氧化物的质量比各自选择为：（i）加热气体包括原子氢; （ii）难熔金属氧化物进料基本上是热力学稳定的（即，不会被原子氢还原的低氧化物的同时形成最小化）; 和（iii）难熔金属氧化物通过与加热的气体接触而被还原，从而形成初级难熔金属（例如，初级钽金属和/或初级铌金属）。
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公开(公告)号：US20060065073A1
公开(公告)日：2006-03-30
申请号：US10953163
申请日：2004-09-29
申请人： Leonid Shekhter , Leonid Lanin , Anastasis Conlon
发明人： Leonid Shekhter , Leonid Lanin , Anastasis Conlon
IPC分类号： B22F9/20
摘要： A method of producing a refractory metal powder that includes providing a metal powder containing magnesium tantalate or magnesium niobate; and heating the powder in an inert atmosphere in the presence of magnesium, calcium and/or aluminum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder and/or heating the powder under vacuum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder, the heating steps being performed in any order. The metal powder can be formed into pellets at an appropriate sintering temperature, which can be formed into electrolytic capacitors.
摘要翻译： 一种制造难熔金属粉末的方法，其包括提供含有钽酸镁或铌酸镁的金属粉末; 并在镁，钙和/或铝的存在下在惰性气氛中加热粉末至足以从粉末中除去钽酸镁或铌酸镁的温度和/或在真空下加热粉末至足以除去钽酸镁或 从粉末中获得铌酸镁，加热步骤以任何顺序进行。 金属粉末可以在可以形成为电解电容器的适当烧结温度下形成粒料。
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