Method of dehydroxylating a hydroxylated material and method of making a mesoporous film
    12.
    发明授权
    Method of dehydroxylating a hydroxylated material and method of making a mesoporous film 失效
    脱羟基化羟基化材料的方法和制备介孔膜的方法

    公开(公告)号:US06383466B1

    公开(公告)日:2002-05-07

    申请号:US09222569

    申请日:1998-12-28

    CPC classification number: C01B37/02 H01L21/31695

    Abstract: The present invention is a method of dehydroxylating a silica surface that is hydroxylated having the steps of exposing the silica surface separately to a silicon organic compound and a dehydroxylating gas. Exposure to the silicon organic compound can be in liquid, gas or solution phase, and exposure to a dehydroxylating gas is typically at elevated temperatures. In one embodiment, the improvement of the dehydroxylation procedure is the repetition of the soaking and dehydroxylating gas exposure. In another embodiment, the improvement is the use of an inert gas that is substantially free of hydrogen. In yet another embodiment, the present invention is the combination of the two-step dehydroxylation method with a surfactant templating method of making a mesoporous film.

    Abstract translation: 本发明是一种将羟基化的二氧化硅表面脱羟基化的方法,其具有将二氧化硅表面分别暴露于硅有机化合物和脱羟基化气体的步骤。 暴露于硅有机化合物可以是液体,气体或溶液相,并且暴露于脱羟基化气体通常处于升高的温度。 在一个实施方案中,脱羟基化程序的改进是重复浸泡和脱羟基化气体暴露。 在另一个实施方案中,改进是使用基本上不含氢的惰性气体。 在另一个实施方案中,本发明是两步脱羟基化方法与制备介孔膜的表面活性剂模板法的组合。

    Method of freeform fabrication by selective gelation of powder
suspensions
    13.
    发明授权
    Method of freeform fabrication by selective gelation of powder suspensions 失效
    通过选择性凝胶化粉末悬浮液的自由形成方法

    公开(公告)号:US5697043A

    公开(公告)日:1997-12-09

    申请号:US652872

    申请日:1996-05-23

    Abstract: The present invention is a novel method for freeform fabrication. Specifically, the method of solid freeform fabrication has the steps of: (a) preparing a slurry by mixing powder particles with a suspension medium and a gelling polysaccharide; (b) making a layer by depositing an amount of said powder slurry in a confined region; (c) hardening a selected portion of the layer by applying a gelling agent to the selected portion; and (d) repeating steps (b) and (c) to make successive layers and forming a layered object. In many applications, it is desirable to remove unhardened material followed by heating to remove gellable polysaccharide then sintering.

    Abstract translation: 本发明是一种用于自由形状制作的新颖方法。 具体地说,固体自由形成方法具有以下步骤:(a)通过将粉末颗粒与悬浮介质和胶凝多糖混合来制备浆料; (b)通过在限定区域中沉积一定数量的所述粉末浆料来制备层; (c)通过将胶凝剂施加到所选择的部分来硬化所述层的选定部分; 和(d)重复步骤(b)和(c)以制备连续层并形成分层物体。 在许多应用中,期望除去未硬化的材料,然后加热以除去可凝胶的多糖然后烧结。

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