Method for preparing cerium carbonate
    15.
    发明授权
    Method for preparing cerium carbonate 有权
    碳酸铈的制备方法

    公开(公告)号:US08216327B2

    公开(公告)日:2012-07-10

    申请号:US12933576

    申请日:2009-03-18

    IPC分类号: B24D3/02 C09C1/68 C01F17/00

    摘要: The present invention relates to a method for preparing cerium carbonate which enables preparation of hexagonal cerium carbonate by a simplified process, a cerium carbonate powder prepared thereby, and a method for preparing a cerium oxide powder using the same.The method for preparing cerium carbonate comprises the step of contact-reacting orthorhombic cerium carbonate with a primary alcohol aqueous solution comprising water and primary alcohol at a weight ratio of 1:0.1 or more at a temperature of 160° C. or more to form hexagonal cerium carbonate.

    摘要翻译: 本发明涉及一种制备碳酸铈的方法,其可以通过简化的方法制备六方碳酸铈,由此制备的碳酸铈粉末,以及使用其制备二氧化铈粉末的方法。 制备碳酸铈的方法包括在160℃或更高的温度下使正交碳酸铈与包含水和伯醇的伯醇水溶液以1:0.1或更高的重量比接触反应以形成六方晶系的步骤 碳酸铈。

    METHOD FOR PREPARING CERIUM CARBONATE
    16.
    发明申请
    METHOD FOR PREPARING CERIUM CARBONATE 有权
    制备碳酸钙的方法

    公开(公告)号:US20110107680A1

    公开(公告)日:2011-05-12

    申请号:US12933576

    申请日:2009-03-18

    IPC分类号: C09G1/02 C09K3/14 C01F17/00

    摘要: The present invention relates to a method for preparing cerium carbonate which enables preparation of hexagonal cerium carbonate by a simplified process, a cerium carbonate powder prepared thereby, and a method for preparing a cerium oxide powder using the same.The method for preparing cerium carbonate comprises the step of contact-reacting orthorhombic cerium carbonate with a primary alcohol aqueous solution comprising water and primary alcohol at a weight ratio of 1:0.1 or more at a temperature of 160° C. or more to form hexagonal cerium carbonate.

    摘要翻译: 本发明涉及一种制备碳酸铈的方法,其可以通过简化的方法制备六方碳酸铈,由此制备的碳酸铈粉末,以及使用其制备二氧化铈粉末的方法。 制备碳酸铈的方法包括在160℃或更高的温度下使正交碳酸铈与包含水和伯醇的伯醇水溶液以1:0.1或更高的重量比接触反应以形成六方晶系的步骤 碳酸铈。

    Method for preparing cerium carbonate
    18.
    发明授权
    Method for preparing cerium carbonate 有权
    碳酸铈的制备方法

    公开(公告)号:US08795623B2

    公开(公告)日:2014-08-05

    申请号:US13016311

    申请日:2011-01-28

    IPC分类号: C01F17/00

    摘要: Disclosed is a method for preparing cerium carbonate that can prepare cerium carbonate having uniform crystal structure, shape and size with high productivity. The method for preparing cerium carbonate comprises: continuously introducing a reaction solution comprising cerium precursor and urea in a tubular reactor including an inlet, an outlet, and one or more reaction tubes through the inlet; reacting the cerium precursor with urea at an elevated temperature in the reaction tube; and, continuously discharging cerium carbonate formed by the reaction of the cerium precursor and urea to the outlet.

    摘要翻译: 公开了一种制备能够以高生产率制备具有均匀晶体结构,形状和尺寸的碳酸铈的碳酸铈的方法。 制备碳酸铈的方法包括:在包括入口,出口和一个或多个反应管的管式反应器中连续引入包含铈前体和尿素的反应溶液通过入口; 在反应管中在升高的温度下使铈前体与脲反应; 并且通过铈前体和尿素的反应形成的碳酸铈连续排出到出口。

    SLURRY COMPOSITION FOR CMP, AND POLISHING METHOD
    19.
    发明申请
    SLURRY COMPOSITION FOR CMP, AND POLISHING METHOD 有权
    用于CMP和抛光方法的浆料组合物

    公开(公告)号:US20120270399A1

    公开(公告)日:2012-10-25

    申请号:US13502062

    申请日:2010-10-13

    摘要: The present invention relates to a CMP slurry composition comprising an abrasive particle; a dispersant; an ionic polymer additive; and a non-ionic polymer additive including a polyolefin-polyethylene glycol copolymer including at least two polyethylene glycol repeat unit as a backbone and at least a polyethylene glycol repeating unit as a side chain, and a polishing method with using the slurry composition. The CMP slurry composition shows a low polishing rate to a single-crystalline silicon layer or a polysilicon layer and a high polishing rate to a silicon oxide layer, resulting in having an excellent polishing selectivity.

    摘要翻译: 本发明涉及包含磨料颗粒的CMP浆料组合物; 分散剂; 离子聚合物添加剂; 以及包含至少包含两个聚乙二醇重复单元作为主链的聚烯烃 - 聚乙二醇共聚物和至少一个作为侧链的聚乙二醇重复单元的非离子聚合物添加剂和使用该浆料组合物的抛光方法。 CMP浆料组合物显示对单晶硅层或多晶硅层的低抛光速率和对氧化硅层的高抛光速率,导致具有优异的抛光选择性。