公开(公告)号：WO2009012124A3

公开(公告)日：2009-03-26

申请号：PCT/US2008069718

申请日：2008-07-11

Applicant: CABOT CORP ,  VENIGALLA SRIDHAR

Inventor： VENIGALLA SRIDHAR

IPC: H01G9/052

CPC classification number: H01G9/0525

Abstract: Nb1-xTaxO powder wherein x is 0.1 to 0.5 is described. Further, this powder, as well as niobium suboxide powders, can be doped with at least one dopant oxide. Pressed bodies of the powder, sintered bodies, capacitor anodes, and capacitors are also described.

Abstract translation: 描述了x为0.1至0.5的Nb1-xTaxO粉末。 此外，该粉末以及低氧化铌粉末可以掺杂至少一种掺杂剂氧化物。 还描述了粉末，烧结体，电容器阳极和电容器的压制体。

公开(公告)号：WO2004103906A3

公开(公告)日：2005-10-06

申请号：PCT/US2004015626

申请日：2004-05-19

Applicant: CABOT CORP ,  REED DAVID M ,  VENIGALLA SRIDHAR ,  KITCHELL RICKY W ,  KRAUSE STEPHEN J ,  ENMAN HEATHER L ,  SCHULTZ DORRAN L ,  KERCHNER JEFFREY A

Inventor： REED DAVID M ,  VENIGALLA SRIDHAR ,  KITCHELL RICKY W ,  KRAUSE STEPHEN J ,  ENMAN HEATHER L ,  SCHULTZ DORRAN L ,  KERCHNER JEFFREY A

IPC: C01G33/00 ,  C01G35/00

CPC classification number: C01G33/00 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/17 ,  C01P2006/40 ,  Y10T428/2982

Abstract: Methods to at least partially reduce a niobium oxide are described wherein the process includes mixing the niobium oxide and niobium powder to form powder mixture that is then heat treated to form heat treated particles which then undergo reacting in an atmosphere which permits the transfer of oxygen atoms from the niobium oxide to the niobium powder, and at a temperature and for a time sufficient to form an oxygen reduced niobium oxide. Oxygen reduced niobium oxides having high porosity are also described as well as capacitors containing anodes made from the oxygen reduced niobium oxides.

Abstract translation: 描述了至少部分还原铌氧化物的方法，其中所述方法包括将铌氧化物和铌粉末混合以形成粉末混合物，然后进行热处理以形成热处理颗粒，然后在允许氧原子转移的气氛中进行反应 从氧化铌到铌粉末，并在足以形成氧还原铌氧化物的温度和时间下进行。 还描述了具有高孔隙率的氧还原铌氧化物以及包含由氧还原铌氧化物制成的阳极的电容器。

公开(公告)号：WO2004024630A9

公开(公告)日：2004-06-17

申请号：PCT/US0328702

申请日：2003-09-12

Applicant: CABOT CORP

Inventor： KERCHNER JEFFREY A ,  VENIGALLA SRIDHAR

IPC: C01G23/00 ,  C04B35/468 ,  H01G4/12 ,  H01G4/20 ,  H05K1/16

CPC classification number: C04B35/62821 ,  C01G23/006 ,  C01P2004/62 ,  C04B35/468 ,  C04B35/626 ,  C04B35/62625 ,  C04B35/62886 ,  C04B2235/3215 ,  C04B2235/3236 ,  C04B2235/5445 ,  C04B2235/79 ,  H01G4/1227 ,  H01G4/206 ,  H05K1/162 ,  H05K2201/0209

Abstract: The invention provides dielectric (e.g., barium titanate-based) particles having passivated surfaces. The surfaces may be passivated, for example, using methods that limit the dissolution of divalent metals (e.g., barium) from the particle surfaces in subsequent processing steps. In some methods, the surfaces are passivated by washing the particles to form a divalent metal-depleted surface region. In other methods, the particles may be coated with a divalent metal insoluble compound or a divalent metal free compound. Advantageously, the surface passivated particles may be uniformly dispersed to form dispersions that are stable for long periods of time and may be further processed to form articles having particles uniformly dispersed therein. The particles are particularly suitable in the formation of polymer/dielectric composites that may be used in embedded capacitor applications.

Abstract translation: 本发明提供具有钝化表面的电介质（例如，钛酸钡基）颗粒。 例如，可以使用限制来自后续加工步骤中的颗粒表面的二价金属（例如钡）的溶解的方法钝化表面。 在一些方法中，通过洗涤颗粒钝化表面以形成二价金属耗尽表面区域。 在其他方法中，颗粒可以用二价金属不溶化合物或二价金属化合物涂覆。 有利地，表面钝化颗粒可以均匀分散以形成长时间稳定的分散体，并且可以进一步处理以形成其中均匀分散颗粒的制品。 这些颗粒特别适用于形成可用于嵌入式电容器应用的聚合物/电介质复合材料。

公开(公告)号：WO02059056A3

公开(公告)日：2002-10-03

申请号：PCT/US0150570

申请日：2001-12-21

Applicant: CABOT CORP

Inventor： VENIGALLA SRIDHAR ,  THRUSH KATHLEEN A

IPC: C04B35/46 ,  C01G23/00 ,  C04B35/468 ,  C04B35/628

CPC classification number: C04B35/62818 ,  B82Y30/00 ,  C01G23/006 ,  C01P2002/34 ,  C01P2002/52 ,  C01P2004/84 ,  C01P2006/40 ,  C04B35/468 ,  C04B35/628 ,  C04B35/62886 ,  C04B35/62894 ,  C04B35/62897 ,  C04B2235/3215 ,  C04B2235/3236 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/528 ,  C04B2235/5445 ,  C04B2235/5454 ,  Y10S977/776 ,  Y10S977/89 ,  Y10T428/2991

Abstract: Coated barium titanate-based particles and a process to coat the particles are provided. The coating includes a dopant metal compound that is insoluble in water under alkaline conditions. The dopant metal in the coating is selected from the group of metals which form oxides or hydroxides that are soluble in water under alkaline conditions such as tungsten, molybdenum, vanadium, and chromium. The process involves precipitating the insoluble compound from an aqueous medium as a coating on surfaces of barium titanate-based particles. The coated barium titanate-based particles may be further processed, for example, to form dielectric materials which may be used in many electronic applications such as in MLCCs applications.

Abstract translation: 提供涂覆的钛酸钡基颗粒和涂覆颗粒的方法。 涂层包括在碱性条件下不溶于水的掺杂剂金属化合物。 涂层中的掺杂剂金属选自在碱性条件下如钨，钼，钒和铬可溶于水的氧化物或氢氧化物的金属组。 该方法包括从水性介质中沉淀出不溶性化合物作为钛酸钡基颗粒表面上的涂层。 涂覆的钛酸钡基颗粒可以进一步加工，例如，以形成可用于诸如MLCC应用中的许多电子应用中的电介质材料。