知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

173 条记录 (耗时 0.06 秒)

    METHOD FOR CONTINUOUS SYNTHESIS OF METAL OXIDE POWDERS
    4.
    发明申请
    METHOD FOR CONTINUOUS SYNTHESIS OF METAL OXIDE POWDERS 有权
    用于连续合成金属氧化物粉末的方法

    公开(公告)号：US20140363365A1

    公开(公告)日：2014-12-11

    申请号：US14296643

    申请日：2014-06-05

    申请人： David A. Berry ,  Daniel J. Haynes ,  Dushyant Shekhawat ,  Mark W. Smith

    发明人： David A. Berry ,  Daniel J. Haynes ,  Dushyant Shekhawat ,  Mark W. Smith

    IPC分类号： C01B13/32

    CPC分类号： C01B13/34 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/62

    摘要： A method for the rapid and continuous production of crystalline mixed-metal oxides from a precursor solution comprised of a polymerizing agent, chelated metal ions, and a solvent. The method discharges solution droplets of less than 500 μm diameter using an atomizing or spray-type process into a reactor having multiple temperature zones. Rapid evaporation occurs in a first zone, followed by mixed-metal organic foam formation in a second zone, followed by amorphous and partially crystalline oxide precursor formation in a third zone, followed by formation of the substantially crystalline mixed-metal oxide in a fourth zone. The method operates in a continuous rather than batch manner and the use of small droplets as the starting material for the temperature-based process allows relatively high temperature processing. In a particular embodiment, the first zone operates at 100-300° C., the second zone operates at 300-700° C., and the third operates at 700-1000° C., and fourth zone operates at at least 700° C. The resulting crystalline mixed-metal oxides display a high degree of crystallinity and sphericity with typical diameters on the order of 50 μm or less.

    摘要翻译： 一种从由聚合剂，螯合金属离子和溶剂组成的前体溶液中快速和连续地生产结晶混合金属氧化物的方法。 该方法使用雾化或喷雾式方法将小于500μm直径的溶液液滴放入具有多个温度区的反应器中。 在第一区域中发生快速蒸发，随后在第二区域中形成混合金属有机泡沫，随后在第三区域中形成无定形和部分结晶的氧化物前体，随后在第四区域中形成基本上结晶的混合金属氧化物 。 该方法以连续而不是间歇的方式操作，并且使用小液滴作为基于温度的方法的起始材料允许相对较高的温度处理。 在特定实施例中，第一区域在100-300℃下操作，第二区域工作在300-700℃，第三区域在700-1000℃下操作，第四区域在至少700° 所得到的结晶混合金属氧化物显示出高度的结晶度和球形度，典型直径为50μm以下。

    METHOD FOR THE PRODUCTION OF MULTIPHASE COMPOSITE MATERIALS USING MICROWAVE PLASMA PROCESS
    6.
    发明申请
    METHOD FOR THE PRODUCTION OF MULTIPHASE COMPOSITE MATERIALS USING MICROWAVE PLASMA PROCESS 有权
    使用微波等离子体处理生产多相复合材料的方法

    公开(公告)号：US20140217630A1

    公开(公告)日：2014-08-07

    申请号：US14208955

    申请日：2014-03-13

    申请人： Makhlouf Redjdal ,  Kamal Hadidi

    发明人： Makhlouf Redjdal ,  Kamal Hadidi

    IPC分类号： B01J19/12

    CPC分类号： B01J19/126 ,  C01B13/34 ,  C01F7/162 ,  C01F17/0025 ,  C01P2002/02 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/61 ,  C04B35/44 ,  C04B35/443 ,  C04B35/6263 ,  C04B35/62665 ,  C04B35/645 ,  C04B35/6455 ,  C04B2235/3222 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/528 ,  C04B2235/764

    摘要： Disclosed herein is a method to produce multiphase composite materials directly from solution precursor droplets by a fast pyrolysis process using a microwave plasma embodiment containing a microwave generating source, a dielectric plasma torch, and a droplet maker. Here, using homogenous solution precursors, droplets are generated with a narrow size distribution, and are injected and introduced into the microwave plasma torch with generally uniform thermal path. The generally uniform thermal path in the torch is achieved by axial injection of droplets into an axisymmetric hot zone with laminar flows. Upon exposing to high temperature within the plasma with controlled residence time, the droplets are pyrolyzed and converted into particles by quenching with a controlled rate of the exhaust gas in a gas chamber. The particles generated have generally uniform sizes and uniform thermal history, and can be used for a variety of applications.

    摘要翻译： 本文公开了一种通过使用包含微波发生源，介电等离子体焰炬和液滴制造器的微波等离子体实施例的快速热解法直接从溶液前驱体液滴产生多相复合材料的方法。 在这里，使用均匀的溶液前体，产生具有窄尺寸分布的液滴，并注入并引入具有大致均匀热路径的微波等离子体焰炬中。 通过将液滴轴向注入到具有层流的轴对称热区域中，可实现手电筒中大致均匀的热路径。 当以受控的停留时间暴露于等离子体内的高温时，液滴被热解并通过在气室中以受控的排气速率淬火而转化为颗粒。 产生的颗粒具有大致均匀的尺寸和均匀的热历史，并可用于各种应用。

    Fumed silica of controlled aggregate size and processes for manufacturing the same
    8.
    发明授权
    Fumed silica of controlled aggregate size and processes for manufacturing the same 有权
    受控骨料尺寸的煅制二氧化硅及其制造方法

    公开(公告)号：US08729158B2

    公开(公告)日：2014-05-20

    申请号：US13041100

    申请日：2011-03-04

    申请人： Sheldon B. Davis ,  Angelica M. Sanchez Garcia ,  David Matheu ,  Yakov E. Kutsovsky

    发明人： Sheldon B. Davis ,  Angelica M. Sanchez Garcia ,  David Matheu ,  Yakov E. Kutsovsky

    IPC分类号： C08L63/00 ,  C01B33/12

    CPC分类号： C01B33/183 ,  B82Y30/00 ,  C01B13/34 ,  C01F7/30 ,  C01P2004/04 ,  C01P2004/45 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/22 ,  C09C1/30 ,  C09C1/3063 ,  C09C1/3081 ,  C09K3/1409

    摘要： The invention provides fumed silica comprising aggregates that have an aggregate size and a surface area that satisfy particular formulas relating aggregate size to surface area, as well as aggregates that exhibit particular viscosity, power law exponent index, and/or elastic modulus characteristics when dispersed in liquid media. The invention also provides processes of preparing such fumed silica by combining a silica precursor with a stream of combustible gas, combusting the stream, and producing a stream of combusted gas and fumed silica particles, wherein dopants are introduced, the time/temperature profile, or history, of the stream of combusted gas and fumed silica particles is adjusted to allow for post-quench aggregate growth, and/or additional silica precursor is introduced into the stream of combusted gas.

    摘要翻译： 本发明提供的热解法二氧化硅包括具有聚集体尺寸和表面积的聚集体，所述聚集体尺寸和表面积满足关于聚集体尺寸与表面积的特定公式，以及在分散时显示特定粘度，幂律指数指数和/或弹性模量特性的聚集体 液体介质。 本发明还提供了通过将二氧化硅前体与可燃性气体流合并，燃烧该物流并产生一种燃烧气体和煅制二氧化硅颗粒的方法，其中引入了掺杂剂，时间/温度曲线或 调节燃烧气体流和气相二氧化硅颗粒的历史以允许后淬火聚集体生长，和/或将另外的二氧化硅前体引入燃烧气体流中。