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    Manufactured articles in silicon oxide and/or other mixed metallic oxides and process for their preparation in “final” or “almost final” dimensions
    2.
    发明授权
    Manufactured articles in silicon oxide and/or other mixed metallic oxides and process for their preparation in “final” or “almost final” dimensions 失效
    在氧化硅和/或其他混合金属氧化物中制造制品，以及制备“最终”或“几乎最终”尺寸的方法

    公开(公告)号：US06567210B2

    公开(公告)日：2003-05-20

    申请号：US08533551

    申请日：1995-09-25

    申请人： Lorenzo Costa ,  Paolo Chiurlo

    发明人： Lorenzo Costa ,  Paolo Chiurlo

    IPC分类号： G02B508

    CPC分类号： C03B19/12 ,  C03B2201/31 ,  C03B2201/42

    摘要： An optical article, which is a preform for an optical lens, which is isotropic, consisting essentially of silicon oxide or silicon oxide in combination with one or more oxides of elements belonging to Groups III to VI of the Periodic Table, the article having a dimensional precision which has tolerance to surface roughness and profilometric accuracy required in the spectral interval of 200-800 nm of the electromagnetic spectrum, the tolerance being between one-half and one-tenth wavelength corresponding to the range of about 0.350-0.02 &mgr;m.

    摘要翻译： 一种光学制品，其是用于光学透镜的预成型体，其是各向同性的，主要由氧化硅或氧化硅组合，其与属于周期表第III至VI族的元素的一种或多种氧化物组合，所述制品具有尺寸 在电磁谱的200-800nm的光谱间隔中具有对表面粗糙度和轮廓测量精度的公差的精度，该公差在相当于约0.350-0.02μm的范围内的一半和十分之一波长之间。

    Process for producing a linearly-miniaturized densified optical article using a mold having an internal volume which is a homothetic copy of the optical article
    3.
    发明授权
    Process for producing a linearly-miniaturized densified optical article using a mold having an internal volume which is a homothetic copy of the optical article 失效
    使用具有作为光学制品的同质性拷贝的内部体积的模具来生产线性小型致密化光学制品的方法

    公开(公告)号：US06374637B1

    公开(公告)日：2002-04-23

    申请号：US09651109

    申请日：2000-08-30

    申请人： Lorenzo Costa ,  Paolo Chiurlo

    发明人： Lorenzo Costa ,  Paolo Chiurlo

    IPC分类号： C03B802

    CPC分类号： C03B19/12 ,  C03B2201/31 ,  C03B2201/42

    摘要： A process for producing a linearly-miniaturized, densified optical product, which entails a) cold filling a mould with a liquid colloidal dispersion formed from a chemical precursor; b) polycondensing the liquid colloidal dispersion to obtain a gel; c) supercritically drying the gel to form an amorphous aerogel having dimensions corresponding to the mould; and d) isotropically miniaturizing the amorphous monolithic aerogel obtained.

    摘要翻译： 一种用于生产线性微型致密化光学产品的方法，其需要a）用由化学前体形成的液体胶体分散体冷灌注模具; b）将液体胶体分散体缩聚得到凝胶; c）超临界干燥凝胶以形成具有对应于模具的尺寸的无定形气凝胶; 和d）使所获得的非晶整体气凝胶各向同性地小型化。

    Process for the preparation of mixed porous silica-alumina oxides in a spherical form
    4.
    发明授权
    Process for the preparation of mixed porous silica-alumina oxides in a spherical form 失效
    用于制备球形混合多孔二氧化硅 - 氧化铝氧化物的方法

    公开(公告)号：US5731261A

    公开(公告)日：1998-03-24

    申请号：US642897

    申请日：1996-05-06

    申请人： Luigi Balducci ,  Raffaele Ungarelli ,  Paolo Chiurlo

    发明人： Luigi Balducci ,  Raffaele Ungarelli ,  Paolo Chiurlo

    IPC分类号： C01B13/32 ,  C01F7/02 ,  B01J32/00 ,  C01B33/00 ,  C04B35/185

    CPC分类号： C01B13/328 ,  C01F7/02 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/61 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16

    摘要： The present invention relates to a process for the preparation of mixed porous oxides with a spherical morphology and the oxides themselves thus obtained. This process consists in emulsifying, in an acid environment, a mixed sol with a dispersing medium, gelifying the microemulsion thus formed by contact with an alkaline solution and subjecting the gel obtained to thermal aging in the presence of the emulsifying liquid and gelation base of the sol or in a water medium, under controlled conditions of pH and temperature. The above mixed oxides can be widely applied as carriers for catalysts or as precursors of ceramic materials.

    摘要翻译： 本发明涉及一种制备具有球形形态的混合多孔氧化物和由此获得的氧化物本身的方法。 该方法包括在酸性环境下，将具有分散介质的混合溶胶乳化，将由此形成的微乳液与碱溶液接触，使所得到的凝胶在乳化液和凝胶化基质的存在下进行热老化 溶胶或在水介质中，在pH和温度的控制条件下。 上述混合氧化物可广泛用作催化剂载体或作为陶瓷材料的前体。