公开(公告)号：US20050225927A1

公开(公告)日：2005-10-13

申请号：US10818606

申请日：2004-04-06

Applicant: Solon Tagusagawa ,  Antonio Pereira ,  Alberto Ono

Inventor： Solon Tagusagawa ,  Antonio Pereira ,  Alberto Ono

IPC: C01G33/00 ,  H01G2/00 ,  H01G9/042

CPC classification number: C01G33/00 ,  C01P2004/03 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/80 ,  H01G9/042

Abstract: The present invention relates to niobium oxides having a controlled tantalum content and processes for producing such niobium oxides. The tantalum content can be homogenous or heterogeneous and can be obtained using various process, including co-precipitation, impregnation, deposition, and mixing processes. Niobium pentoxide having a controlled tantalum content can further be reduced to niobium monoxide with controlled tantalum content using a single step reduction process, or can first be reduced to niobium-dioxide with controlled tantalum content using a two step process. The niobium monoxide with controlled tantalum content produced according to such processes can exhibit a high surface area and an appropriate morphology, and can be used to make capacitors with a high capacitance and a low leakage current.

Abstract translation: 本发明涉及具有受控钽含量的铌氧化物及其生产方法。 钽含量可以是均匀的或不均匀的，并且可以使用各种方法获得，包括共沉淀，浸渍，沉积和混合过程。 具有受控钽含量的五氧化二铌可以使用单步骤还原方法进一步降低至具有受控钽含量的铌氧化物，或者可以首先使用两步法将其调节为具有受控钽含量的二氧化铌。 根据这种方法制备的具有受控钽含量的一氧化铌可以表现出高的表面积和适当的形态，并且可以用于制造具有高电容和低泄漏电流的电容器。

公开(公告)号：US20060275204A1

公开(公告)日：2006-12-07

申请号：US10573293

申请日：2004-01-23

Applicant: Solon Tagusagawa ,  Alberto Ono ,  Flavio Beneduce ,  Joao Ferreira

Inventor： Solon Tagusagawa ,  Alberto Ono ,  Flavio Beneduce ,  Joao Ferreira

IPC: C01G31/02

CPC classification number: C01G33/00 ,  C01P2004/03 ,  C01P2006/12 ,  C01P2006/40 ,  H01G9/0525

Abstract: The present invention is related to a process for the production of a powder of niobium monoxide (NbO) having a high purity, large specific surface area, controlled oxygen and nitrogen contents and a morphology adequate for use in the manufacture of capacitors, characterized by comprising two niobium pentoxide (Nb2O5) reduction steps, the first step comprising reducing, by hydrogen, the niobium pentoxide (Nb2O5) to niobium dioxide (NbO2), and the second step comprising reducing niobium dioxide (NbO2) to niobium monoxide (NbO), by using an oxygen getter material in a convenient atmosphere which permits the transfer of the oxygen atoms from the niobium oxide (NbO2) to the getter material, under adequate conditions of time and temperature to form the niobium monoxide (NbO). The particles of powder of niobium monoxide (NbO) produced using the instant process are small, have a large surface area and an appropriate morphology, and are adequate for the production of capacitors.

Abstract translation: 本发明涉及一种生产具有高纯度，大比表面积，受控氧和氮含量的氧化铌粉末（NbO）的制造方法以及足以用于制造电容器的形态，其特征在于包括 两个五氧化铌（Nb 2 O 5 O 5）还原步骤，第一步骤包括通过氢还原五氧化二铌（Nb 2 O 5） （NbO 2）），并且第二步骤包括将二氧化铌（NbO 2 N 2）还原为一氧化铌（NbO），通过 在适当的气氛中使用吸氧剂材料，其允许在足够的时间和温度条件下将氧原子从氧化铌（NbO 2 N 2）转移到吸气材料上以形成铌一氧化物 NbO）。 使用本方法制备的一氧化铌粉末（NbO）颗粒小，具有大的表面积和适当的形态，并且足以生产电容器。

公开(公告)号：US20060096418A1

公开(公告)日：2006-05-11

申请号：US10533791

申请日：2003-08-27

Applicant: Solon Tagusagawa

Inventor： Solon Tagusagawa

IPC: B22F9/20

CPC classification number: H01G9/0525 ,  B22F9/24 ,  B22F2998/10 ,  B22F2999/00 ,  C22B5/04 ,  C22B34/1268 ,  C22B34/20 ,  C22B34/24 ,  B22F1/0088 ,  B22F2201/03 ,  B22F2201/02

Abstract: The present invention refers to a process for production of a powder of niobium and/or tantalum having high purity, large specific surface area, controlled contents of oxygen and nitrogen, and a morphology that is adequate for use in the manufacture of capacitors, characterized by including one sole step of reduction of a controlled layer of niobium and/or tantalum oxide (NbxOy, and/or TaxOy, where x=1 to 2 and y=1 to 5) deliberately formed over particles of metallic niobium and/or tantalum and/or hydrides thereof of adequate purity, by alkali metals or earth alkali metals and/or hydrides thereof in a bath of molten salts followed by a step of dissolution of the salt in an aqueous solution for recovery of the niobium and/or tantalum powder. These particles produced using the said process have a small size, large surface area and a sponge-like morphology, being thereby adequate for the production of capacitors.

Abstract translation: 本发明涉及一种生产具有高纯度，大比表面积，受控含氧量和氮含量的铌和/或钽粉末的方法，以及足以用于制造电容器的形态，其特征在于： 包括在金属铌和/或钽的颗粒上故意形成的铌和/或氧化钽（Nb x O y和/或TaxO y，其中x = 1至2和y = 1至5）受控层的还原的唯一步骤， 碱金属或碱土金属和/或其氢化物在熔盐浴中浸渍，然后将盐溶解在用于回收铌和/或钽粉末的水溶液中的步骤。 使用所述方法制造的这些颗粒具有小尺寸，大的表面积和海绵状形态，从而足以用于制造电容器。