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    Process for the manufacture of a sintered, ceramic abrasive and grinding tools with this abrasive
    78.
    发明授权
    Process for the manufacture of a sintered, ceramic abrasive and grinding tools with this abrasive 有权
    用这种磨料制造烧结陶瓷磨料和研磨工具的方法

    公开(公告)号：US06214069B1

    公开(公告)日：2001-04-10

    申请号：US09263306

    申请日：1999-03-05

    申请人： Paul Blank ,  Andreas Krell

    发明人： Paul Blank ,  Andreas Krell

    IPC分类号： C09K314

    CPC分类号： C09K3/1418 ,  C04B35/1115

    摘要： An economical process for the manufacture of a polycrystalline, sintered, ceramic abrasive from a powder raw material is described, which process is characterized by the following process steps: preparation of a slip largely free from polymerizing and/or coagulating additives from the powder raw material; pressureless shallow casting of the slip in a vessel; degassing, drying and crushing of the cast sheet to obtain a fabricated material and sintering of the fabricated material to create the abrasive. This process can be used to manufacture an abrasive that permits extremely high grinding performance due to its extraordinary density and structural integrity.

    摘要翻译： 描述了一种用于从粉末原料制造多晶，烧结陶瓷研磨剂的经济方法，该方法的特征在于以下工艺步骤：制备大量不含粉末原料聚合和/或凝结添加剂的滑动剂 ; 压力容器中的滑动的无压浅铸件; 脱气，干燥和粉碎，以获得制造的材料并烧结所制造的材料以产生研磨剂。 该方法可用于制造由于其非凡的密度和结构完整性而允许极高磨削性能的磨料。

    Shaped abrasive particles and method of making same
    79.
    发明授权
    Shaped abrasive particles and method of making same 失效
    成型磨料颗粒及其制造方法

    公开(公告)号：US5984988A

    公开(公告)日：1999-11-16

    申请号：US61262

    申请日：1998-04-17

    申请人： Todd A. Berg ,  Donley D. Rowenhorst ,  James G. Berg ,  William K. Leonard

    发明人： Todd A. Berg ,  Donley D. Rowenhorst ,  James G. Berg ,  William K. Leonard

    IPC分类号： B24D3/06 ,  B24D18/00 ,  C04B35/111 ,  C09K3/14 ,  C09C1/68

    CPC分类号： B24D3/06 ,  B24D18/0009 ,  C04B35/1115 ,  C09K3/1409

    摘要： A method of making abrasive particles having a specified shape and abrasive articles containing abrasive particles having a specified shape. The method for preparing such an abrasive particle comprises the steps of: (a) providing a dispersion containing particles of a precursor of alpha alumina, preferably particles of alpha alumina monohydrate, in a liquid, which liquid comprises a volatile component; (b) providing a mold having a first surface and a second surface opposed to said first surface, said first surface having an opening to a mold cavity having a specified shape; (c) introducing the dispersion into said mold cavity; (d) removing a sufficient portion of the volatile component of the liquid from the dispersion while the dispersion is in the mold cavity, to form a precursor of an abrasive particle having approximately the same shape as the shape of the recess of the mold cavity; (e) removing the precursor of the abrasive particle from the recess of the mold; (f) calcining the removed precursor of the abrasive particle; and (g) sintering the calcined precursor to form the desired abrasive particle.

    摘要翻译： 制造具有特定形状的磨料颗粒和含有具有特定形状的磨料颗粒的磨料制品的方法。 制备这种磨料颗粒的方法包括以下步骤：（a）在液体中提供含有α氧化铝前体，优选α氧化铝一水合物颗粒的分散体的分散体，该液体包含挥发性组分; （b）提供具有与所述第一表面相对的第一表面和第二表面的模具，所述第一表面具有到具有指定形状的模腔的开口; （c）将分散体引入所述模腔中; （d）当分散体在模腔中时，从分散体中除去足够部分的挥发性成分的液体，以形成具有与模腔凹陷形状大致相同形状的磨料颗粒的前体; （e）从模具的凹槽中除去磨料颗粒的前体; （f）煅烧除去的磨料颗粒前体; 和（g）烧结煅烧前体以形成所需的磨料颗粒。