Process for preparing an aluminium oxide powder having a high alpha-Al2O3 content
    3.
    发明授权
    Process for preparing an aluminium oxide powder having a high alpha-Al2O3 content 有权
    制备具有高α-Al 2 O 3含量的氧化铝粉末的方法

    公开(公告)号:US08834833B2

    公开(公告)日:2014-09-16

    申请号:US13129070

    申请日:2009-11-17

    IPC分类号: C01F7/02 C04B35/10 B32B5/16

    摘要: Process for preparing an aluminum oxide powder which is present in the form of aggregated primary particles and comprises at least 85% by weight of alpha-aluminum oxide, in which an aluminum oxide powder which a) is present in the form of aggregated primary particles, b) is selected from the group consisting of gamma-aluminum oxide, theta-aluminum oxide, delta-aluminum oxide and/or X-ray amorphous aluminum oxide, and c) has a tamped density of at least 250 g/l, is subject to a heat treatment at 13000 C or more and subsequently milled. Aluminum oxide powder which can be obtained by this process. Aluminum oxide powder in the form of aggregated primary particles having a BET surface area of from 3 to 30 m2/g, in which the proportion of alpha-aluminum oxide is at least 85% by weight and the ratio dgo/dio of the weight distribution of the primary particles is at least 2.8. Use as constituent of fluorescent tubes.

    摘要翻译: 制备氧化铝粉末的方法,其以聚集的一次粒子的形式存在并且包含至少85重量%的α-氧化铝,其中a)以聚集的一次粒子的形式存在的氧化铝粉末, b)选自γ-氧化铝,θ-氧化铝,δ-氧化铝和/或X射线无定形氧化铝,以及c)具有至少250g / l的夯实密度,为受试者 进行13000℃以上的热处理,随后研磨。 可以通过该方法获得的氧化铝粉末。 呈BET表面积为3〜30m2 / g的聚集一次粒子形式的氧化铝粉末,其中α-氧化铝的比例为85重量%以上,重量分布比dgo / d 10 的初级粒子至少为2.8。 用作荧光灯管的组成部分。

    PROCESS FOR PREPARING AN ALUMINIUM OXIDE POWDER HAVING A HIGH ALPHA-AL2O3 CONTENT
    9.
    发明申请
    PROCESS FOR PREPARING AN ALUMINIUM OXIDE POWDER HAVING A HIGH ALPHA-AL2O3 CONTENT 有权
    制备具有高ALPHA-AL2O3含量的氧化铝粉末的方法

    公开(公告)号:US20110217552A1

    公开(公告)日:2011-09-08

    申请号:US13129070

    申请日:2009-11-17

    IPC分类号: C01F7/02 B02C19/00

    摘要: Process for preparing an aluminium oxide powder which is present in the form of aggregated primary particles and comprises at least 85% by weight of alpha-aluminium oxide, in which an aluminium oxide powder which a) is present in the form of aggregated primary particles, b) is selected from the group consisting of gamma-aluminium oxide, theta-aluminium oxide, delta-aluminium oxide and/or X-ray amorphous aluminium oxide, and c) has a tamped density of at least 250 g/l, is subject to a heat treatment at 13000C or more and subsequently milled. Aluminium oxide powder which can be obtained by this process. Aluminium oxide powder in the form of aggregated primary particles having a BET surface area of from 3 to 30 m2/g, in which the proportion of alpha-aluminium oxide is at least 85% by weight and the ratio dgo/dio of the weight distribution of the primary particles is at least 2.8. Use as constituent of fluorescent tubes.

    摘要翻译: 制备氧化铝粉末的方法,其以聚集的一次粒子的形式存在并且包含至少85重量%的α-氧化铝,其中a)以聚集的一次粒子的形式存在的氧化铝粉末, b)选自γ-氧化铝,θ-氧化铝,δ-氧化铝和/或X射线无定形氧化铝,以及c)具有至少250g / l的夯实密度,为受试者 在1300℃以上进行热处理,随后研磨。 可以通过该方法获得的氧化铝粉末。 呈BET表面积为3〜30m2 / g的聚集一次粒子形式的氧化铝粉末,其中α-氧化铝的比例为85重量%以上,重量分布比dgo / d 10 的初级粒子至少为2.8。 用作荧光灯管的组成部分。