会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Abrasive grains consisting of polycrystalline alumina
    • 磨粒由多晶氧化铝组成
    • US06613114B1
    • 2003-09-02
    • US09913137
    • 2002-01-17
    • Jean-André Alary
    • Jean-André Alary
    • C09K314
    • C09K3/1427C01F7/027C01P2004/04C01P2004/22C01P2004/34C01P2004/38C01P2004/61
    • The invention relates to an abrasive grain based on electromelted alumina consisting of crystals with a hexagonal structure, of size less than 100 &mgr;m, and preferably less than 30 &mgr;m, and more preferably less than 5 &mgr;m, with density higher than 97%, preferably 98%, of the theoretical density of alumina, and a Knoop hardness higher than 2000. The invention also relates to a method for making abrasive grains based on alumina consisting in melting alumina, casting it at a constant flow rate less than 80 kg/mn, and cooling it by dispersing the melted alumina in fine droplets to obtain articles with size less than 1 mm. The dispersion is preferably performed by ultrasound-assisted spraying, at a frequency ranging between 15 and 50 MHz. The inventive grains are used in particular for making grindstones.
    • 本发明涉及一种基于电沉积氧化铝的磨料颗粒,其特征在于由六方结构的晶体组成,其尺寸小于100μm,优选小于30μm,更优选小于5μm,密度高于97%,优选为98 氧化铝的理论密度的百分比,以及高于2000的诺普硬度。本发明还涉及一种制备基于氧化铝的磨料颗粒的方法,所述氧化铝由熔融氧化铝组成,以小于80kg / m 2的恒定流速浇铸, 并通过将熔融的氧化铝分散在细小的液滴中来冷却,以获得尺寸小于1mm的制品。 该分散体优选通过超声波辅助喷雾在15至50MHz频率范围内进行。 本发明的颗粒特别用于制造磨石。