Cerium oxide powder and cerium oxide dispersion liquid
    1.
    发明专利
    Cerium oxide powder and cerium oxide dispersion liquid 有权
    氧化铈粉和氧化铈分散液

    公开(公告)号:JP2007051057A

    公开(公告)日:2007-03-01

    申请号:JP2006218474

    申请日:2006-08-10

    Abstract: PROBLEM TO BE SOLVED: To provide a cerium oxide powder, a method for producing the same, and a dispersion liquid containing the powder.
    SOLUTION: The cerium oxide powder has a BET surface area of 25-150 m
    2 /g and contains primary particles having an average diameter of 5-50 nm. The layer close to the surface of each primary particle has a depth of about 5 nm, and the carbonate concentration in the layer close to the surface is decreased toward inside from the surface. The content of carbon deriving from carbonate groups is 5-50% by area percentage on the surface and 0-30% by area percentage at a depth of about 5 nm in the layer close to the surface. The content of cerium oxide is at least 99.5 mass% based on powder. Further, the content of carbon is 0.01-0.3 mass% based on powder. The dispersion liquid is sufficiently stable even when an additive is not added additionally and can be used for chemical and mechanical polishing within a range from neutrality to weak alkalinity.
    COPYRIGHT: (C)2007,JPO&INPIT

    Abstract translation: 待解决的问题:提供氧化铈粉末,其制备方法和含有该粉末的分散液。 解决方案:氧化铈粉末的BET表面积为25-150m 2 / SP / g,并且含有平均直径为5-50nm的一次粒子。 靠近每个初级颗粒表面的层具有约5nm的深度,并且靠近表面的层中的碳酸盐浓度从表面向内减小。 来自碳酸酯基团的碳的含量在表面附近的层中为面积百分比为5-50%,在约5nm的深度为0-30%的面积百分比。 氧化铈的含量相对于粉末为99.5质量%以上。 此外,基于粉末,碳的含量为0.01-0.3质量%。 即使不添加添加剂也能够分散液充分稳定,可以在中性至弱碱性的范围内用于化学和机械抛光。 版权所有(C)2007,JPO&INPIT

    Method for making metal oxide powder
    2.
    发明专利
    Method for making metal oxide powder 审中-公开
    制造金属氧化物粉末的方法

    公开(公告)号:JP2006213591A

    公开(公告)日:2006-08-17

    申请号:JP2005345055

    申请日:2005-11-30

    Abstract: PROBLEM TO BE SOLVED: To provide a method of making metal oxide powder by which uniform powders having high BET surface area and narrow particle size distribution can be obtained and suitable for making the metal oxide powder in a range of quantity of kg/hr order. SOLUTION: In the method of making the metal oxide powder having at least 20 m 2 /g BET surface area by reacting aerosol with oxygen in a reaction space at a reaction temperature higher than 700°C and successively separating the resultant powder from a gaseous material, the aerosol is produced by spraying at least one kind of a starting material in a liquid form or a solution and at least one kind of a spray gas using a multi-component nozzle so that the average liquid particle diameter D 30 of the aerosol to the volume is 30-100 μm and the number of aerosol small droplets having a particle diameter larger than 100 μm is ≤10% of the total number of droplets. COPYRIGHT: (C)2006,JPO&NCIPI

    Abstract translation: 要解决的问题:提供一种制备金属氧化物粉末的方法,通过该方法可以获得具有高BET表面积和窄粒度分布的均匀粉末,并且适于使金属氧化物粉末的量为kg / 小时订单。 解决方案:在反应温度高于700℃的反应空间中通过气溶胶与氧气反应制备具有至少20m 2 / SP / g BET表面积的金属氧化物粉末的方法中, 并将所得粉末从气态物质中分离出来,通过使用多组分喷嘴将至少一种起始材料以液体形式或溶液喷射至少一种喷雾气体喷射而制成气雾剂, 气溶胶的体积的平均液体粒径D 30 为30-100μm,粒径大于100μm的气溶胶小液滴的数量为液滴总数的10%。 版权所有(C)2006,JPO&NCIPI

    Method for producing zinc oxide powder
    3.
    发明专利
    Method for producing zinc oxide powder 有权
    氧化锌粉的生产方法

    公开(公告)号:JP2007161580A

    公开(公告)日:2007-06-28

    申请号:JP2006340375

    申请日:2006-12-18

    CPC classification number: C01G9/03 C01P2006/12 C09C1/043

    Abstract: PROBLEM TO BE SOLVED: To provide an improved method for producing a zinc oxide powder without generating a cake-like material in an evaporation zone and an oxidation zone.
    SOLUTION: In the evaporation zone, a gas flow of an inert gas and a fuel gas is passed through a melt of zinc having a temperature of 780-850°C while forming zinc vapor. In this case, the content of the fuel gas is 1-50 vol.% based on the total volume of the inert gas and the fuel gas, and the molar ratio of the zinc vapor to the fuel gas is 0.01-50. In the oxidation zone, a second gas flow containing an oxygen-containing gas and steam is added to a gas flow of the zinc vapor, the fuel gas, and the inert gas in such an amount that the temperature in the oxidation zone is kept within a range of 500-1,000°C.
    COPYRIGHT: (C)2007,JPO&INPIT

    Abstract translation: 要解决的问题:提供一种在蒸发区和氧化区中不产生饼状材料的氧化锌粉末的制造方法。 解决方案:在蒸发区中,惰性气体和燃料气体的气流在形成锌蒸气的同时通过温度为780-850℃的锌熔体。 在这种情况下,基于惰性气体和燃料气体的总体积,燃料气体的含量为1-50体积%,锌蒸气与燃料气体的摩尔比为0.01-50。 在氧化区中,将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保持在 范围500-1,000℃。 版权所有(C)2007,JPO&INPIT

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