利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

301 条记录 (耗时 0.022 秒)

    Sintering aids for lanthanide ceramics
    3.
    发明授权
    Sintering aids for lanthanide ceramics 有权
    镧系陶瓷烧结助剂

    公开(公告)号：US09115032B2

    公开(公告)日：2015-08-25

    申请号：US13702282

    申请日：2012-02-23

    申请人： Matthew M. Seabaugh ,  Scott Lawrence Swartz

    发明人： Matthew M. Seabaugh ,  Scott Lawrence Swartz

    IPC分类号： C04B35/00 ,  C04B35/50 ,  C04B35/42 ,  C04B35/64 ,  B22F1/00

    CPC分类号： C04B35/50 ,  B22F1/0085 ,  C04B35/42 ,  C04B35/64 ,  C04B2235/3205 ,  C04B2235/3206 ,  C04B2235/3213 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3239 ,  C04B2235/3244 ,  C04B2235/3262 ,  C04B2235/3263 ,  C04B2235/3268 ,  C04B2235/3275 ,  C04B2235/3284 ,  C04B2235/443 ,  C04B2235/449 ,  C04B2235/5409 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/77 ,  C04B2235/80

    摘要： This disclosure relates to a method of densifying a lanthanide chromite ceramic or a mixture containing a lanthanide chromite ceramic. The method comprises mixing one or more lanthanide chromite ceramics with one or more sintering aids, and sintering the mixture. The one or more lanthanide chromite ceramics are represented by the formula (Ln1-xAEx)zCr1-yByO3-δ, wherein Ln is a lanthanide element or yttrium, AE is one or more alkaline earth elements, B is one or more transition metals, x is a value less than 1, y is a value less than or equal to 0.5, and z is a value from 0.8 to 1.2. The sintering aids comprise one or more spinel oxides. The one or more spinel oxides are represented by the formula AB2O4 or A2BO4 wherein A and B are cationic materials having an affinity for B-site occupancy in a lanthanide chromite ceramic structure, e.g., ZnMn2O4, MgMn2O4, MnMn2O4 and CoMn2O4. This disclosure also relates in part to products, e.g., dense ceramic structures produced by the above method.

    摘要翻译： 本公开涉及致密化镧系铬铁矿陶瓷或含有镧系铬铁矿陶瓷的混合物的方法。 该方法包括将一种或多种镧系亚铬酸盐陶瓷与一种或多种烧结助剂混合，并烧结该混合物。 一种或多种镧系亚铬酸盐陶瓷由式（Ln1-xAEx）zCr1-yByO3-δ表示，其中Ln是镧系元素或钇，AE是一种或多种碱土金属元素，B是一种或多种过渡金属，x 是小于1的值，y是小于或等于0.5的值，z是0.8至1.2的值。 烧结助剂包括一种或多种尖晶石氧化物。 一种或多种尖晶石氧化物由式AB2O4或A2BO4表示，其中A和B是对镧系铬铁矿陶瓷结构中的B位占据的亲和性的阳离子材料，例如ZnMn 2 O 4，MgMn 2 O 4，MnMn 2 O 4和CoMn 2 O 4。 本公开还部分地涉及产品，例如通过上述方法制备的致密陶瓷结构。

    Electrically conducting ceramics, process for producing the same and fuel cell using the ceramics
    5.
    发明授权
    Electrically conducting ceramics, process for producing the same and fuel cell using the ceramics 失效
    导电陶瓷，其制造方法和使用陶瓷的燃料电池

    公开(公告)号：US5795502A

    公开(公告)日：1998-08-18

    申请号：US650976

    申请日：1996-05-21

    申请人： Yoshitake Terashi ,  Takashi Shigehisa ,  Masahide Akiyama ,  Shoji Yamashita

    发明人： Yoshitake Terashi ,  Takashi Shigehisa ,  Masahide Akiyama ,  Shoji Yamashita

    IPC分类号： C04B35/42 ,  H01B1/08 ,  H01M8/02 ,  H01M8/10

    CPC分类号： H01B1/08 ,  C04B35/42 ,  H01M8/0215 ,  H01M8/0219

    摘要： Electrically conducting ceramics having, as a chief crystalline phase, a perovskite crystalline phase containing La, Cr and Mg and further having, in addition to the chief crystalline phase, an oxide phase containing La, wherein when the atomic ratios among the rare earth element, Mg and Cr in said chief crystalline phase are represented by the following formula, R:Mg:Cr=x:y:z wherein R denotes rare earth elements at least part of which being La, the atomic ratios among the rare earth element, Mg and Cr contained in the whole ceramics are represented by the following formula, R:Mg:Cr=(x+u):(y+v):z wherein R, x to z are as defined above, and u and v are the numbers satisfying the following formulas, 0.0001.ltoreq.u/(x+y+z).ltoreq.0.20, 0.01.ltoreq.(y+v)/(x+y+z).ltoreq.0.60, and 0.ltoreq.v. The ceramics is dense, exhibits excellent sintering property at low temperatures, has high electric conductivity, and remains stable in a reducing atmosphere.

    摘要翻译： 作为主要结晶相的导电陶瓷具有包含La，Cr和Mg的钙钛矿结晶相，并且除主要结晶相外，还含有含有La的氧化物相，其中当稀土元素， 所述主结晶相中的Mg和Cr由下式表示：R：Mg：Cr = x：y：z其中，R表示至少部分为La的稀土元素，稀土元素，Mg 包含在整个陶瓷中的Cr由下式表示：R：Mg：Cr =（x + u）：（y + v）：z其中R，x至z如上所定义，u和v是 满足以下公式的数字：0.0001

    Preparation of lanthanum chromate powders by sol-gel
    8.
    发明授权
    Preparation of lanthanum chromate powders by sol-gel 失效
    通过溶胶 - 凝胶法制备铬酸镧粉末

    公开(公告)号：US5061402A

    公开(公告)日：1991-10-29

    申请号：US515787

    申请日：1990-04-25

    申请人： William L. Olson ,  Beili Li ,  Jean Yamanis

    发明人： William L. Olson ,  Beili Li ,  Jean Yamanis

    IPC分类号： C01G37/00 ,  C04B35/42 ,  H01M8/02 ,  H01M8/12

    CPC分类号： H01M8/0215 ,  C01G37/006 ,  C04B35/42 ,  C01P2002/54 ,  C01P2004/52 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/14 ,  C01P2006/36 ,  C01P2006/60 ,  H01M2008/1293 ,  H01M2300/0074

    摘要： This invention relates to a process for the preparation of a crystalline compound having an empirical formula LaCr.sub.x A.sub.1-x O.sub.4.yH.sub.2 O where A is a metal selected from the group consisting of Mg, Sr, Ca and Ba, x ranges from 0.99 to about 0.7 and y ranges from 0 to 0.15. The process comprises adding a solution of the appropriate metal salts to a solution of ammonium hydroxide thereby precipitating a hydroxide gel intermediate, which is dried and calcined in air to yield the resultant crystalline compound which has a huttonite structure. Additionally, this invention relates to a process for the preparation of a ceramic powder having the empirical formula LaCr.sub.x A.sub.1-x O.sub.3, where A is a metal selected from the group consisting of Mg, Sr, Ca and Ba, and x ranges from 0.99 to about 0.7. Finally, a ceramic composition having the empirical formula LaCr.sub.x A.sub.1-x O.sub.4.yH.sub.2 O having a huttonite structure is also disclosed.

    摘要翻译： 本发明涉及制备具有经验式LaCrxAl-xO4.yH2O的结晶化合物的方法，其中A是选自Mg，Sr，Ca和Ba的金属，x为0.99至约0.7，y为 范围从0到0.15。 该方法包括将合适的金属盐溶液加入到氢氧化铵溶液中，由此使氢氧化凝胶中间体沉淀，将其在空气中干燥和煅烧，得到所得到的具有钙钛矿结构的结晶化合物。 另外本发明涉及制备具有经验式LaCrxAl-xO3的陶瓷粉末的方法，其中A是选自Mg，Sr，Ca和Ba的金属，x在0.99至0.7的范围内 。 最后，还公开了具有钙钛矿结构的经验式LaCrxAl-xO4.yH2O的陶瓷组合物。

    Cryogenic ceramic and apparatus
    10.
    发明授权
    Cryogenic ceramic and apparatus 失效
    低温陶瓷和器具

    公开(公告)号：US4296608A

    公开(公告)日：1981-10-27

    申请号：US152404

    申请日：1980-05-22

    申请人： William N. Lawless

    发明人： William N. Lawless

    IPC分类号： C04B35/42 ,  C04B35/495 ,  F25B9/14 ,  F25D3/00 ,  H01B3/12 ,  C04B35/00 ,  F25B9/00 ,  F28D17/00

    CPC分类号： F25D3/00 ,  C04B35/42 ,  C04B35/495 ,  F25B9/14 ,  H01B3/12 ,  F25B2309/003 ,  Y10S505/896

    摘要： Ceramic material, and cryogenic refrigeration apparatus containing thermal energy absorbing elements made of the ceramic material, which is a dielectric insulator and has values of specific heat at selected temperatures below 15.degree. K. that are greater than or at least equal to the values of specific heat of pure lead at those same temperatures. Material consists essentially of a crystalline phase with a composition defined by the molar formula selected from: (1) AB.sub.2 O.sub.4 where A is Group 2b metal ions with or without other divalent metal ions and B is Cr ion with or without other trivalent metal ions, (2) AB.sub.2 O.sub.6 where A is Mn and/or Ni ion(s) with or without other divalent metal ions and B is Nb and/or Ta ion(s), and (3) A.sub.2 BCO.sub.6 where A is Pb ion with or without other divalent metal ions, B is Gd or Mn with or without other trivalent metal ions and C is Nb and/or Ta ion(s). Elements include regenerator packings, thermal dampers and dielectric insulation.

    摘要翻译： 陶瓷材料和低温制冷装置，其包含由陶瓷材料制成的热能吸收元件，陶瓷材料是介电绝缘体，并且在低于15°K的选定温度下具有大于或至少等于特定值的值的比热值 纯铅在同一温度下的热量。 材料基本上由结晶相组成，其组成由选自以下的摩尔数式所定义：（1）AB 2 O 4，其中A是具有或不具有其它二价金属离子的第2b族金属离子，B是具有或不具有其它三价金属离子的Cr离子（ 2）AB2O6，其中A是具有或不具有其它二价金属离子的Mn和/或Ni离子，B是Nb和/或Ta离子，和（3）A2BCO6，其中A是具有或不具有其它二价的Pb离子 金属离子，B是具有或不具有其它三价金属离子的Gd或Mn，C是Nb和/或Ta离子。 元素包括再生器填料，热阻尼器和介电绝缘。