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39 条记录 (耗时 0.029 秒)

    Method for producing barium titanate based powders by oxalate process
    4.
    发明申请
    Method for producing barium titanate based powders by oxalate process 有权
    通过草酸盐法生产钛酸钡基粉末的方法

    公开(公告)号：US20020048547A1

    公开(公告)日：2002-04-25

    申请号：US09871286

    申请日：2001-05-31

    申请人： Samsung Electro-Mechanics Co., Ltd.

    发明人： Jai Joon Lee ,  Kang Heon Hur

    IPC分类号： C01G023/04

    CPC分类号： C01G25/006 ,  C01G23/006 ,  C01G25/00 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/40

    摘要： The present invention discloses a method for preparing a barium titanate and barium titanate based powder by an oxalate process. The method is carried out in the following manner: An aqueous mixture solution containing barium chloride and titanium chloride is added into an aqueous oxalic acid solution, so that barium titanyl oxalate would be precipitated. Then the precipitates are aged, washed and filtered. The filtered barium titanyl oxalate precipitates are crushed, and dried. Then a thermal decomposition is carried out to obtain a agglomerated barium titanate powder, and this is crushed again to obtain the final barium titanate powder. In order to obtain barium titanate based powder such as Ba(Ti1nullzZrz)O3, (Ba1nullxCax)(Ti1nullzZrz)O3, and (Ba1nullxnullyCaxSry)(Ti1nullzZrz)O3, the desired elements (Ca, Sr, Zr and so on) are added to barium titanyl oxalate when crushed before thermal decomposition step. After thermal decomposition and crushing, the barium titanate based powder can be obtained.

    摘要翻译： 本发明公开了一种通过草酸盐法制备钛酸钡和钛酸钡基粉末的方法。 该方法按以下方式进行：将含有氯化钡和氯化钛的混合溶液加入草酸水溶液中，使草酸二氧化钛沉淀。 然后将沉淀物老化，洗涤和过滤。 过滤的草酸氧钛钡沉淀物被粉碎并干燥。 然后进行热分解以获得凝集的钛酸钡粉末，并再次粉碎，得到最终的钛酸钡粉末。 为了获得Ba（Ti1-zZrz）O3，（Ba1-xCax）（Ti1-zZrz）O3和（Ba1-x-yCaxSry）（Ti1-zZrz）O3等钛酸钡系粉末，需要的元素（Ca ，Sr，Zr等）加入到钛酸氧钛酸钡中，在热分解步骤之前被粉碎。 在热分解和破碎之后，可以获得钛酸钡基粉末。

    Process for making lithium titanate
    9.
    发明申请
    Process for making lithium titanate 有权
    制备钛酸锂的方法

    公开(公告)号：US20030017104A1

    公开(公告)日：2003-01-23

    申请号：US10199212

    申请日：2002-07-19

    申请人： Altair Nanomaterials Inc.

    发明人： Timothy M. Spitler ,  Jan Prochazka

    IPC分类号： C01G023/04

    CPC分类号： H01M4/485 ,  B82Y30/00 ,  C01G23/005 ,  C01P2002/32 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/13 ,  H01M4/5825 ,  H01M2004/021

    摘要： A process is provided for making lithium titanate of closely controlled particle size in the range 5 nm to 2000 nm. The process includes re-firing lithium titanate under controlled conditions so that crystallites of the desired particle size are grown. The lithium titanate may be derived from any suitable source. A suitable source of lithium titanate can be from a process that includes evaporation of a blend that contains lithium and titanium to form a mixture containing lithium and titanium compounds that are subsequently calcined to form lithium titanate. The blend of titanium and lithium may be derived from a variety of titanium and lithium precursor materials.

    摘要翻译： 提供了一种制备粒径在5nm至2000nm范围内的严格控制粒径的钛酸锂的方法。 该方法包括在控制条件下重新煅烧钛酸锂，使得生长所需粒径的微晶。 钛酸锂可以衍生自任何合适的来源。 合适的钛酸锂源可以来自包括蒸发含有锂和钛的共混物以形成含有随后煅烧形成钛酸锂的锂和钛化合物的混合物的方法。 钛和锂的共混物可以衍生自各种钛和锂前体材料。

    Dielectric particles having passivated surfaces and methods of forming same
    10.
    发明申请
    Dielectric particles having passivated surfaces and methods of forming same 审中-公开
    具有钝化表面的介电颗粒及其形成方法

    公开(公告)号：US20040052721A1

    公开(公告)日：2004-03-18

    申请号：US10244041

    申请日：2002-09-13

    发明人： Jeffrey A. Kerchner ,  Sridhar Venigalla

    IPC分类号： C01G023/04 ,  C01G023/00

    CPC分类号： 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

    摘要： 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.

    摘要翻译： 本发明提供具有钝化表面的电介质（例如，钛酸钡基）。 例如，可以使用在后续处理步骤中限制二价金属（例如钡）从颗粒表面溶解的方法来钝化表面。 在一些方法中，通过洗涤颗粒来钝化表面以形成二价金属贫化表面区域。 在其它方法中，颗粒可以涂覆有二价金属不溶性化合物或二价无金属化合物。 有利地，表面钝化的颗粒可以均匀地分散以形成长时间稳定的分散体，并且可以进一步加工以形成具有均匀分散在其中的颗粒的制品。 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。