DISPERSION OF ZIRCONIUM DIOXIDE AND ZIRCONIUM MIXED OXIDE
    85.
    发明申请
    DISPERSION OF ZIRCONIUM DIOXIDE AND ZIRCONIUM MIXED OXIDE 审中-公开
    二氧化锆和二氧化锆混合氧化物的分散

    公开(公告)号:WO2006067131A1

    公开(公告)日:2006-06-29

    申请号:PCT/EP2005/056940

    申请日:2005-12-20

    IPC分类号: C01G25/02 C04B35/486 C09K3/14

    摘要: Dispersion of zirconium dioxide having a solids content of from 30 to 75 wt.%, based on the total amount of the dispersion, and a median value of the particle size distribution in the dispersion of less than 200 nm, obtainable by predispersing a zirconium dioxide powder and/or a zirconium mixed oxide powder having a ZrC>2 content of at least 70 wt.%, the powders being in the form of aggregated primary particles and having no internal surface and a BET surface area of the powder of 60 ± 15 m2/g, in a dispersing agent in the presence of from 0.1 to 5 wt.%, based on the total amount of the dispersion, of a surface- modifying agent with an energy input of less than 200 KJ/m3, dividing the predispersion obtained into at least two part streams, placing these part streams under a pressure of at least 500 bar in a high-energy mill and decompress them via a nozzle, these part streams colliding with one another in a gas- or liquid-filled reaction chamber and thereby being ground, and optionally subsequently adjusting the dispersion to the desired content with further dispersing agent. It can be used for the production of ceramic layers, membranes and shaped articles .

    摘要翻译: 基于分散体的总量,固体含量为30至75重量%的二氧化锆的分散体,以及小于200nm的分散体中的粒度分布的中值,可通过预分散二氧化锆 粉末和/或具有至少70重量%的ZrC> 2含量的锆混合氧化物粉末,粉末为聚集的一次颗粒的形式,并且没有内表面,粉末的BET表面积为60±15 m 2 / g,在分散剂中,基于分散体的总量为0.1至5重量%,具有能量输入小于200KJ / m 3的表面改性剂,将预分散体 获得至少两部分流,将这些部分物流在高能磨机中放置至少500巴的压力下,并通过喷嘴对其进行减压,这些部分物流在气体或液体填充的反应室中相互碰撞 并因此被研磨,并且可选地 随后用其它分散剂将分散体调节至所需的含量。 它可用于生产陶瓷层,膜和成型制品。