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    PYROLYSIS OF CERAMIC PRECURSORS TO NANOPOROUS CERAMICS
    7.
    发明公开
    PYROLYSIS OF CERAMIC PRECURSORS TO NANOPOROUS CERAMICS 失效
    陶瓷前驱体纳米多孔陶瓷的热解

    公开(公告)号：EP0889862A1

    公开(公告)日：1999-01-13

    申请号：EP97953462.0

    申请日：1997-12-19

    申请人： EXXON RESEARCH AND ENGINEERING COMPANY

    发明人： DISMUKES, John, P. ,  JOHNSON, Jack, W. ,  PIZZULLI, James, L.

    IPC分类号： C01B33 ,  C04B38

    CPC分类号： C04B38/0022 ,  Y10S977/831 ,  C04B35/571 ,  C04B38/0058 ,  C04B35/589

    摘要： The present invention provides for amorphous, nanoporous, ceramic material having a surface area in excess of 70 m2/gm and characterized by a high content of open microporous cell structure wherein the micropores have a mean width of less than 20 Angstroms and wherein said microporous structure comprises a volume of greater than about 0.03 cm3/gm of the ceramic. The invention also provides a process for the preparation of such nanoporous ceramics wherein a ceramic precursor polymer or oligomer is gradually heated in the presence of an inert gas or vacuum up to a maximum temperature in the range of greater than 400 °C up to about 650 °C. Optionally, the process may also include a cross-linking step conducted prior to the heating step wherein the precursor polymer or oligomer is heated in the presence of a cross-linking agent capable of undergoing addition or substitution reactions with backbone atoms present in said precursor material, at an intermediate temperature of about 100° to 400 °C for a period of time sufficient to cross-link said precursor material, followed by pyrolysis of the cross-linked material.

    Graphene double-barrier resonant tunneling device
    8.
    发明公开
    Graphene double-barrier resonant tunneling device 审中-公开
    Resonante Tunneleffektvorrichtung aus Graphen mit Doppelbarriere

    公开(公告)号：EP3037382A1

    公开(公告)日：2016-06-29

    申请号：EP14200335.9

    申请日：2014-12-24

    申请人： Nokia Technologies OY

    发明人： Astley, Michael Robert

    IPC分类号： B82Y10/00 ,  H01L29/73 ,  H01L29/88 ,  H01L29/08 ,  H01L29/16 ,  H01L29/76

    CPC分类号： H01L29/0895 ,  B82Y10/00 ,  C01B21/064 ,  C01B32/182 ,  C01P2006/40 ,  H01L29/1606 ,  H01L29/2003 ,  H01L29/7311 ,  H01L29/7613 ,  H01L29/882 ,  Y10S977/734 ,  Y10S977/831 ,  Y10S977/937

    摘要： An apparatus comprising: a fermion source nanolayer (90); a first insulating nanolayer (92); a fermion transport nanolayer (94); a second insulating nanolayer (96); a fermion sink nanolayer (98); a first contact for applying a first voltage to the fermion source nanolayer; a second contact for applying a second voltage to the fermion sink nanolayer; and a transport contact for enabling an electric current via the fermion transport nanolayer. In a particular example, the apparatus comprises three graphene sheets (90, 94, 98) interleaved with two-dimensional Boron-Nitride (BN) layers (92, 96).

    摘要翻译： 一种装置，包括：费米子源纳米层（90）; 第一绝缘纳米层（92）; 费米子运输纳米层（94）; 第二绝缘纳米层（96）; 费米子槽纳米层（98）; 用于将第一电压施加到费米籽源纳米层的第一接触; 用于向所述费米子槽纳米层施加第二电压的第二接触; 以及用于通过费米子运输纳米层实现电流的运输接触件。 在具体示例中，该装置包括与二维硼氮化物（BN）层（92,96）交错的三个石墨烯片（90,94,98）。