中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

231 records (took 0.014 seconds)

    Fixation by anion exchange of toxic materials in a glass matrix
    132.
    发明授权
    Fixation by anion exchange of toxic materials in a glass matrix 失效
    通过玻璃基质中有毒物质的阴离子交换固定

    公开(公告)号：US4333847A

    公开(公告)日：1982-06-08

    申请号：US65752

    申请日：1979-08-10

    Applicant: Danh C. Tran ,  Pedro B. Macedo ,  Joseph H. Simmons ,  Catherine J. Simmons ,  Nicholas Lagakos

    Inventor： Danh C. Tran ,  Pedro B. Macedo ,  Joseph H. Simmons ,  Catherine J. Simmons ,  Nicholas Lagakos

    IPC: G21F9/02 ,  G21F9/30 ,  G21F9/36 ,  G21F9/16

    CPC classification number: C03C1/002 ,  C03C1/026 ,  C03C11/005 ,  C03C21/001 ,  C03C23/0095 ,  C03C3/06 ,  C03C3/061 ,  C03C3/089 ,  G21F9/02 ,  G21F9/305 ,  G21F9/36 ,  C03C2201/10 ,  C03C2201/20 ,  C03C2201/23 ,  C03C2201/3411 ,  C03C2201/3423 ,  C03C2201/3429 ,  C03C2201/40 ,  C03C2201/42 ,  C03C2201/50 ,  C03C2201/54

    Abstract: This invention relates to the immobilization of toxic, e.g., radioactive materials, internally in a silicate glass or silica gel matrix for extremely long periods of time. Toxic materials, such as radioactive wastes containing radioactive anions, and in some cases cations, which may be in the form of liquids, or solids dissolved or dispersed in liquids or gases, are internally incorporated into a glass matrix, having hydrous organofunctionalsiloxy groups, e.g., hydrous aminoalkylsiloxy or carboxyorganosiloxy, bonded to silicon atoms of said glass and/or hydrous polyvalent metals bonded to silicon atoms of said glass through divalent oxygen linkages or otherwise immobilized therein, by a process which involves the ion exchange of said toxic, radioactive anions with hydroxyl groups attached to said organofunctionalsiloxy groups or with hydroxyl groups attached to the hydrous polyvalent metal. Thereafter, the resulting glass now characterized by a distribution of internally bonded or immobilized, toxic, radioactive anions can be packaged in suitable containers, and disposed of as by burial, and/or they can be sintered to collapse the pores thereof prior to disposal or for producing useful radiation sources. The porous glass or a porous silica gel having said silicon-bonded organofunctionalsiloxy groups and/or said hydrous polyvalent metal oxy groups, the pores of said glass or silica gel remaining open and uncollapsed, can be used advantageously as a backfill for an underground radioactive waste burial site and as overpack in the waste disposal container. Also included is a novel method for bonding the polyvalent metal to the porous silica glass or gel by substituting the protons of the silicon-bonded hydroxyl groups thereof with an alkali metal or ammonium cation followed by displacement of said cation with the non-radioactive polyvalent metal cation.

    Abstract translation: 本发明涉及在硅酸盐玻璃或硅胶基质中内部有毒的例如放射性物质固定极长时间。 含有放射性阴离子的放射性废物，以及在某些情况下，可能是液体形式的阳离子或溶解或分散在液体或气体中的固体的有毒材料内部加入到具有含水官能团的甲硅烷氧基的玻璃基质中，例如 ，含水氨基烷基甲硅烷氧基或羧基有机基甲硅烷氧基，通过涉及将所述有毒放射性阴离子与所述有机放射性阴离子的离子交换的方法，通过二价氧键键合到所述玻璃的硅原子和/或与所述玻璃的硅原子键合的含水多价金属， 连接到所述有机电致甲硅烷氧基基团的羟基或与水合多价金属连接的羟基的羟基。 此后，所得玻璃的特征在于内部结合或固定的，有毒的放射性阴离子的分布可以包装在合适的容器中，并且通过埋置进行处理和/或它们可以在处理之前烧结以使其孔隙塌缩，或 用于生产有用的辐射源。 所述多孔玻璃或多孔硅胶具有所述与硅键合的有机铁氧基甲硅烷氧基和/或所述含水多价金属氧基，所述玻璃或硅胶的孔保持开放和未破裂，可有利地用作地下放射性废物的回填 垃圾处理容器内的包装物， 还包括一种通过用碱金属或铵阳离子取代与硅键合的羟基的质子，然后用非放射性多价金属置换所述阳离子来将多价金属键合到多孔石英玻璃或凝胶上的新方法 阳离子。

    Material and Process for Fabricating and Shaping of Transparent Multicomponent Fused Silica Glasses
    135.
    发明公开
    Material and Process for Fabricating and Shaping of Transparent Multicomponent Fused Silica Glasses 审中-公开

    公开(公告)号：US20240166547A1

    公开(公告)日：2024-05-23

    申请号：US18549129

    申请日：2022-03-28

    Applicant: Glassomer GmbH

    Inventor： Bastian Rapp ,  Frederik Kotz-Helmer

    IPC: C03B19/06 ,  C03C1/00 ,  C03C3/06

    CPC classification number: C03B19/066 ,  C03C1/00 ,  C03C3/06 ,  C03B2201/06 ,  C03C2201/10 ,  C03C2201/32 ,  C03C2201/42 ,  C03C2201/50

    Abstract: The present invention relates to a moldable nanocomposite for producing a transparent article made of multicomponent fused silica glass, the moldable nanocomposite comprising: an organic binder; and a fused silica glass powder dispersed in the organic binder, the fused silica glass powder comprising fused silica glass particles having a diameter in the range from 5 nm to 500 nm, wherein the fused silica glass powder is pre-modified with a dopant and/or wherein at least one non-crystalline modifying agent is contained in the moldable nanocomposite and one or more dopant reagents selected from organoelement compounds, metal complexes and salts are contained in the moldable nanocomposite as the at least one non-crystalline modifying agent, and wherein the content of the fused silica glass powder in the moldable nanocomposite is at least 5 parts per volume based on 100 parts per volume of the organic binder. Further, the present invention relates to a method of producing a transparent article made of multicomponent fused silica glass.

    ULTRALOW EXPANSION GLASS
    140.
    发明申请
    ULTRALOW EXPANSION GLASS 审中-公开

    公开(公告)号：US20170349475A1

    公开(公告)日：2017-12-07

    申请号：US15661303

    申请日：2017-07-27

    Applicant: Corning Incorporated

    Inventor： Carlos Alberto Duran

    IPC: C03B25/00 ,  C03C3/076 ,  C03B25/08 ,  C03C3/06 ,  C03B25/02

    CPC classification number: C03B25/00 ,  C03B25/02 ,  C03B25/08 ,  C03B2201/42 ,  C03C3/06 ,  C03C3/076 ,  C03C2201/00 ,  C03C2201/42 ,  Y02P40/57

    Abstract: Silica-titania glasses with small temperature variations in coefficient of thermal expansion over a wide range of zero-crossover temperatures and methods for making the glasses. The method includes a cooling protocol with controlled anneals over two different temperature regimes. A higher temperature controlled anneal may occur over a temperature interval from 750-950° C. or a sub-interval thereof. A lower temperature controlled anneal may occur over a temperature interval from 650-875° C. or a sub-interval thereof. The controlled anneals permit independent control over CTE slope and Tzc of silica-titania glasses. The independent control provides CTE slope and Tzc values for silica-titania glasses of fixed composition over ranges heretofore possible only through variations in composition.

Patent Agency Ranking