ELECTROMAGNETIC SHIELDING
    4.
    发明授权
    ELECTROMAGNETIC SHIELDING 有权
    电磁屏蔽

    公开(公告)号:EP1027819B1

    公开(公告)日:2004-09-22

    申请号:EP98956352.3

    申请日:1998-10-29

    IPC分类号: H05K9/00

    摘要: Electromagnetic shielding material is formed from a shielding composition made with magnetic particles and a binder, where the magnetic particles have an average diameter less than about 1000 nm and are substantially crystalline. The magnetic particles can be formed from Fe2O3, Fe3O4, Fe3C, or Fe7C3. The shielding composition can be formed into a layer (500) or into composite particles (600). The binder (504) can be a metal or an electrically conducting polymer. A conducting layer (558) can be placed adjacent to the shielding composition. The shielding material can be used to protect sensitive electronic devices. Methods are described for forming iron oxide particles by laser pyrolysis.

    PRODUCTION OF PARTICLES BY CHEMICAL REACTION
    5.
    发明授权
    PRODUCTION OF PARTICLES BY CHEMICAL REACTION 失效
    粒子的通过化学反应生产

    公开(公告)号:EP0907410B1

    公开(公告)日:2003-05-02

    申请号:EP98903934.2

    申请日:1998-02-06

    摘要: An apparatus produces particles, preferably nanoparticles, from gas phase chemical reactions induced by a radiation beam. The radiation beam comprises preferably electromagnetic radiation or a laser beam. The apparatus includes a reaction chamber (102) with a window (242) for introducing the radiation and an elongated reactant inlet (164), and said reaction chamber is configured to conform generally to the elongated shape of the reactant inlet. Shielding gas may be introduced (196) to form a blanket of inert gas on both sides of the reactant stream to prevent reactive gases and product particles striking the chamber walls and the optical components. The apparatus may further comprise a pyrometer (302) to monitor the emission of reactants, a particle size analyser (400) and a computer (108). A feedback loop with a pressure sensor (30 4) may be used to maintain the desired pressure within the reaction chamber.