Zinc oxide powder aggregates present in circular, ellipsoidal, linear and branched form
    1.
    发明授权
    Zinc oxide powder aggregates present in circular, ellipsoidal, linear and branched form 有权
    呈圆形,椭圆形,线形和分枝状的氧化锌粉末聚集体

    公开(公告)号:US07371337B2

    公开(公告)日:2008-05-13

    申请号:US10572936

    申请日:2004-09-02

    IPC分类号: H01B1/00 H01B1/12 C01G9/02

    摘要: Pyrogenically prepared zinc oxide powder having a BET surface area of from 10 to 200 m2/g, which is in the form of aggregates, the aggregates being composed of particles having different morphologies, and 0-10% of the aggregates being in a circular form, 30-50% being in an ellipsoidal form, 30-50% being in a linear form and 20-30% being in a branched form. It is prepared by reacting a starting mixture containing zinc vapour, a combustible gas and steam or a mixture of steam and carbon dioxide in a flame with an oxygen-containing gas in an oxidation zone, cooling the hot reaction mixture in a quenching zone and separating the solid material from the gas stream, the amount of oxygen in the oxidation zone being greater than the amount necessary for the complete oxidation of the combustible gas and the zinc vapour. The zinc oxide powder can be used as a constituent of sun protection compositions for protection against UV radiation.

    摘要翻译: 热解制备的氧化锌粉末,其BET表面积为10至200m 2 / g,其为聚集体形式,聚集体由具有不同形态的颗粒组成,并且0-10% 的聚集体为圆形,30-50%为椭圆形,30-50%为直线形式,20-30%为分支形式。 通过在氧化区中将含有锌蒸汽,可燃气体和蒸汽或蒸汽和二氧化碳的混合物在火焰中与含氧气体的起始混合物反应制备,在淬火区域中冷却热反应混合物并分离 来自气流的固体材料,氧化区中的氧的量大于可燃气体和锌蒸汽的完全氧化所需的量。 氧化锌粉末可用作防紫外线辐射防晒组合物的组分。

    PROCESS FOR THE PRODUCTION OF ZINC OXIDE POWDER
    4.
    发明申请
    PROCESS FOR THE PRODUCTION OF ZINC OXIDE POWDER 审中-公开
    氧化锌粉的生产工艺

    公开(公告)号:US20070172415A1

    公开(公告)日:2007-07-26

    申请号:US11612112

    申请日:2006-12-18

    IPC分类号: C01G9/02

    摘要: Zinc oxide powder is prepared by a process having the following steps a) generating of a zinc vapor-containing stream in a vaporization zone; b) oxidizing the zinc vapor by reaction with an oxygen-containing gas thereby forming zinc oxide powder in an oxidation zone; and c) cooling of the reaction mixture with water or an inert gas, and separation of the zinc oxide powder in a cooling/isolation zone, wherein aa) in the vaporization zone, a gas stream of an inert gas and a fuel gas is passed through a zinc melt which has a temperature of 450 to

    摘要翻译: 通过具有以下步骤的方法制备氧化锌粉末:a)在汽化区产生含有含锌蒸气的料流; b)通过与含氧气体反应氧化锌蒸气,从而在氧化区形成氧化锌粉末; 和c)用水或惰性气体冷却反应混合物,并且在蒸发区中的aa),惰性气体和燃料气体的气流中的氧化锌粉末在冷却/隔离区中分离, 通过温度为450〜900℃的锌熔体,由此形成锌蒸汽,燃料气体的含量为1〜50体积%。 %,基于惰性气体和燃料气体的总和,氧化区中锌蒸气与燃料气体的摩尔商为0.01〜50,bb)为含有含氧气体和蒸汽的第二气流 加入到锌蒸汽,燃料气体和惰性气体的气流中,其量使得氧化区中的温度为500至1100℃,其中氧含量至少足以将所有燃料气体从 蒸发区和锌蒸汽,并且蒸汽通过燃料气体与引入氧化区的含氧气体的反应而产生

    YTTRIUM-ZIRCONIUM MIXED OXIDE POWDER
    5.
    发明申请
    YTTRIUM-ZIRCONIUM MIXED OXIDE POWDER 审中-公开
    YTTRIUM-ZIRCONIUM混合氧化物粉末

    公开(公告)号:US20090092531A1

    公开(公告)日:2009-04-09

    申请号:US11572742

    申请日:2005-07-19

    IPC分类号: C01F17/00

    摘要: Nano-scale yttrium-zirconium mixed oxide powder in the form of aggregated primary particles having the following physico-chemical parameters:—BET surface area: from 40 to 100 m2/g,—da=from 3 to 30 nm, d,=mean, number-related primary particle diameter,—yttrium content, calculated as yttrium oxide Y2O3, determined by chemical analysis, from 5 to 15 wt. %, based on the mixed oxide powder,—yttrium contents of individual primary particles, calculated as yttrium oxide Y2O3 determined by TEM EDX, corresponding to the content in the powder+−10%,—content at room temperature, determined by X-ray diffraction and based on the mixed oxide powder—monoclinic zirconium oxide from

    摘要翻译: 具有以下物理化学参数的聚集一次粒子形式的纳米级钇 - 锆混合氧化物粉末:-BET表面积:40-100m 2 / g,-da = 3-30nm,d =平均值 通过化学分析确定的数量相关的一次粒径,钇含量,以氧化钇Y 2 O 3计算,为5〜15wt。 %,基于混合氧化物粉末,通过TEM EDX测定的单个一次粒子的钇含量以与氧化镁Y 2 O 3相当的方式计算,对应于室温下的含量在-10℃〜室温下,通过X射线衍射测定 并且基于<1至10重量%的混合氧化物粉末 - 单斜晶氧化锆。 %四氯化锆,10至95wt。 % - 在1300℃下加热2小时后的单斜晶氧化锆的含量小于1重量%。 %, - 碳含量小于0.2wt。 %。 通过雾化含有有机锆氧化物前体和无机氧化钇前体的有机溶剂的溶液,在燃烧气体/空气火焰中燃烧,分离气体和固体产物来制备。 它可以用作陶瓷基材。