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    Method of making alpha alumina-based abrasive grain containing silica and iron oxide
    31.
    发明授权
    Method of making alpha alumina-based abrasive grain containing silica and iron oxide 失效
    制备含有二氧化硅和氧化铁的α氧化铝基磨料颗粒的方法

    公开(公告)号：US5645619A

    公开(公告)日：1997-07-08

    申请号：US670889

    申请日：1996-06-26

    Applicant: Dwight D. Erickson ,  Larry D. Monroe ,  Thomas E. Wood ,  David M. Wilson

    Inventor： Dwight D. Erickson ,  Larry D. Monroe ,  Thomas E. Wood ,  David M. Wilson

    IPC: C04B35/111 ,  C09C1/68

    CPC classification number: C04B35/1115 ,  B24D11/00 ,  C09K3/1436

    Abstract: A method of making an alpha alumina-based ceramic abrasive grain comprising, on a theoretical oxide basis, Al.sub.2 O.sub.3, Fe.sub.2 O.sub.3, and SiO.sub.2. The abrasive grain has a surface roughness height of greater than about 200 nanometers and a density of greater than about 3.50 g/cm.sup.3. Preferably, the alpha alumina-based ceramic abrasive grain has alpha alumina crystallites having an average crystallite size of less than about 0.5 micrometer (more preferably, less than about 0.3 micrometer). The presence of the SiO.sub.2 in combination with Fe.sub.2 O.sub.3 increases the amount of transgranular fracture of the abrasive grain, reduces the alpha alumina crystallite growth during sintering of the abrasive grain, dilates at least one of the unit cell dimensions of the abrasive grain, and generally improves the grinding performance of the abrasive grain.

    Abstract translation: 一种制造基于氧化铝的陶瓷磨粒的方法，其包括在理论氧化物基础上的Al 2 O 3，Fe 2 O 3和SiO 2。 磨粒具有大于约200纳米的表面粗糙度高度和大于约3.50g / cm 3的密度。 优选地，α氧化铝基陶瓷磨粒具有平均微晶尺寸小于约0.5微米（更优选小于约0.3微米）的α氧化铝微晶。 SiO 2与Fe 2 O的组合的存在增加了磨粒的晶粒间断裂的量，减少了磨粒的烧结期间的α氧化铝微晶生长，使磨粒的单元电池尺寸中的至少一个扩大，并且通常改善 研磨性能的磨粒。

    Shaped, fractured abrasive particle, abrasive article using same and method of making
    32.
    发明授权
    Shaped, fractured abrasive particle, abrasive article using same and method of making 有权
    成型，断裂的磨料颗粒，使用其的磨料制品和制造方法

    公开(公告)号：US09446502B2

    公开(公告)日：2016-09-20

    申请号：US13227924

    申请日：2011-09-08

    Applicant: Dwight D. Erickson ,  Scott R. Culler ,  Negus B. Adefris ,  John T. Boden ,  John D. Haas

    Inventor： Dwight D. Erickson ,  Scott R. Culler ,  Negus B. Adefris ,  John T. Boden ,  John D. Haas

    IPC: C09K3/14 ,  B24D3/00 ,  B01J2/22

    CPC classification number: B24D3/00 ,  B01J2/22 ,  C09K3/1409 ,  Y10T428/24364 ,  Y10T428/24413 ,  Y10T428/2982

    Abstract: Precursor alpha alumina abrasive particles in a mold are subjected to a drying process that cracks or fractures at least a majority of the precursor abrasive particles into at least two pieces thereby producing abrasive shards having a smaller size than the mold cavity from which they were made. The smaller abrasive shards, once formed, could be reassembled like jigsaw puzzle pieces to reproduce the original cavity shape of the mold from which they were made. The cracking or fracturing of the precursor abrasive particles is believed to occur by ensuring that the surface tension of the abrasive dispersion to the walls of the mold is greater than the internal attractive forces of the abrasive dispersion as the abrasive dispersion is dried within the mold cavity.

    Abstract translation: 将模具中的前体α氧化铝磨料颗粒进行干燥处理，使至少大部分前体研磨剂颗粒破裂或破裂成至少两个，从而产生具有比其制造的模具腔更小的尺寸的磨料碎片。 一旦形成的较小的磨料碎片可以像拼图拼图一样重新组装，以再现其制造的模具的原始腔体形状。 认为前体研磨剂颗粒的破裂或断裂是通过确保研磨分散体在模具腔内干燥的情况下，研磨分散体对模具壁的表面张力大于磨料分散体的内吸力而发生的 。

    Shaped Abrasive Particles and Method of Making
    33.
    发明申请
    Shaped Abrasive Particles and Method of Making 有权
    成型研磨颗粒及其制备方法

    公开(公告)号：US20130263525A1

    公开(公告)日：2013-10-10

    申请号：US13818365

    申请日：2011-10-19

    Applicant: Dwight D. Erickson

    Inventor： Dwight D. Erickson

    IPC: B24D3/00

    CPC classification number: C09K3/1418 ,  B24D3/008

    Abstract: A method of making shaped abrasive particles including forming an abrasive flake comprising a plurality of precursor shaped abrasive particles and a frangible support joining the precursor shaped abrasive particles together; transporting the abrasive flake through a rotary kiln to sinter the abrasive flake; and breaking the sintered abrasive flake into individual shaped abrasive particles. The method is useful to make small shaped abrasive particles having insufficient mass to be efficiently individually sintered in a rotary kiln without joining two or more of the shaped abrasive particles together.

    Abstract translation: 一种制造成形磨料颗粒的方法，包括形成包括多个前体成形磨料颗粒的研磨片和将前体成形磨料颗粒接合在一起的易碎支承体; 通过回转窑输送研磨片以烧结研磨片; 并将烧结的磨料碎片破碎成单独的成形磨料颗粒。 该方法可用于使不具有质量的小型磨料颗粒在回转窑中有效地单独烧结而不将两种或多种成形磨料颗粒接合在一起。

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