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    • 2. 发明专利
    • Method of collecting diamond fine powder
    • 空值
    • JP5276995B2
    • 2013-08-28
    • JP2008557169
    • 2008-02-08
    • 博 石塚直樹 小松
    • 陽一 森田竜哉 瀧本直樹 小松博 山中寿男 白澤博 石塚
    • C01B31/06B01D21/00B01D21/01B01J3/06B01J3/08B03B5/28C02F1/52C09K3/14
    • C01B31/065B82Y30/00C01B32/28C01P2004/64C09K3/1409C09K3/1463Y10T428/2982
    • [Task to be solved] One of the principal objects of the invention is to collect minute diamond particles of D 50 of 20 nm and smaller, by MICROTRAC UPA 150, in high precision and high definition. [Means for solving the task] The minute diamond particles of the invention are recovered by a method comprising: (1) joining or combining a hydrophilic functional group with a surface of diamond powder that comprises particles of a primary particle size of 50 nm or less, so as to impart hydrophilic nature on the surface, (2) placing the hydrophilic diamond particles to hold in suspension in water to form a slurry, (3) subjecting said slurry to a hyper-centrifugal process at a centrifugal force of 4x10 3 G and at the same time a centrifugal load product of 200x10 3 G·min. or more, in order to remove by depositing a fraction of coarser particles from the slurry, said load product being defined as product of centrifugal force, loaded, in G and duration of loading in minutes, where G represents the gravitational acceleration constant; (4) adding cations to said slurry, whereby the diamond particles in suspension in the water are deposited.
    • [待解决的任务]本发明的主要目的之一是通过MICROTRAC UPA 150以高精度和高清晰度收集20nm以下的D 50的微小金刚石颗粒。 [解决任务的手段]通过以下方法回收本发明的微小金刚石颗粒:(1)将亲水性官能团与包含一次粒径为50nm以下的粒子的金刚石粉末的表面接合或组合 ,以便赋予表面亲水性,(2)将亲水性金刚石颗粒置于悬浮液中以形成浆料,(3)在4×10 3 G离心力下对所述浆料进行超离心过程 并同时具有200×10 3 G·min的离心负荷产物。 或更多,为了通过从浆料中沉积一部分较粗的颗粒来除去,所述负载产物被定义为离心力的乘积,G中的载荷和以几分钟的载荷持续时间,其中G表示重力加速常数; (4)向所述浆料中加入阳离子,由此沉积在水中悬浮液中的金刚石颗粒。