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    2.
    发明专利
    未知

    公开(公告)号：DE19824104B4

    公开(公告)日：2009-12-24

    申请号：DE19824104

    申请日：1998-04-27

    Applicant: ABB RESEARCH LTD

    Inventor： KLUGE-WEISS PETRA ,  GREUTER FELIX ,  STRUEMPLER RALF

    IPC: H01C7/10 ,  H01B1/20 ,  H01C7/112 ,  H01C7/12

    Abstract: The nonlinear resistor has varistor behaviour and has a matrix and a filler in powder form which is embedded in the matrix. The filler contains sintered varistor granules with predominantly spherical particles of doped metal oxide. These particles are made up of crystalline grains separated from one another by grain boundaries. The filler also contains electrically conductive particles, which cover at most a part of the surfaces of the spherical particles, and/or the varistor granules contain two fractions of particles with different sizes, of which the particles in the first fraction have larger diameters than the particles in the second fraction and are arranged essentially in the form of close sphere packing and the particles in the second fraction fill the interstices formed by the sphere packing.The resistor can be produced straightforwardly and cost-effectively and is distinguished by a high nonlinearity coefficient, which is desired for a good protection characteristic, and by a high power acceptance.

    3.
    发明专利
    未知

    公开(公告)号：DE602006008144D1

    公开(公告)日：2009-09-10

    申请号：DE602006008144

    申请日：2006-06-12

    Applicant: ABB RESEARCH LTD

    Inventor： DONZEL LISE ,  KORNMANN XAVIER ,  GREUTER FELIX

    IPC: H01B3/00 ,  H01B17/42 ,  H01C7/112 ,  H02K3/40

    Abstract: The invention relates to a nonlinear field control tape containing ZnO microvaristor particles. The doped ZnO particles are produced by crushing a sintered ZnO block, by desagglomeration or crushing of calcinated granulated particles, or by crushing of a calcined or sintered tape (tape casting). Embodiments, among other things, relate to: hollow ZnO microvaristor particles produced by granulation technique, having reduced average density and having diameters in a range well below 90 µm; and compounding the ZnO filler in binders that are used to impregnate tapes. Compared to nonlinear field control tapes with conventional embedded nonlinear filler particles, a stronger and more reliable nonlinear resistivity is achieved and the ZnO filler is simpler to produce and to compound in the binder. The resulting tapes are flexible, preferably self-adhesive and have a strong nonlinear electrical resistivity. The tapes are useful to protect high field-stress regions in electrical components.

    6.
    发明专利
    未知

    公开(公告)号：AT303652T

    公开(公告)日：2005-09-15

    申请号：AT99915429

    申请日：1999-04-23

    Applicant: ABB RESEARCH LTD

    Inventor： KLUGE-WEISS PETRA ,  GREUTER FELIX ,  STRUEMPLER RALF

    IPC: H01C7/10 ,  H01C7/112 ,  H01C7/12

    Abstract: The nonlinear resistor has varistor behaviour and has a matrix and a filler in powder form which is embedded in the matrix. The filler contains sintered varistor granules with predominantly spherical particles of doped metal oxide. These particles are made up of crystalline grains separated from one another by grain boundaries. The filler also contains electrically conductive particles, which cover at most a part of the surfaces of the spherical particles, and/or the varistor granules contain two fractions of particles with different sizes, of which the particles in the first fraction have larger diameters than the particles in the second fraction and are arranged essentially in the form of close sphere packing and the particles in the second fraction fill the interstices formed by the sphere packing.The resistor can be produced straightforwardly and cost-effectively and is distinguished by a high nonlinearity coefficient, which is desired for a good protection characteristic, and by a high power acceptance.

    Non-linear resistance with varistor behaviour and method for the production thereof
    8.
    发明专利
    Non-linear resistance with varistor behaviour and method for the production thereof 未知

    公开(公告)号：AU3404399A

    公开(公告)日：1999-11-16

    申请号：AU3404399

    申请日：1999-04-23

    Applicant: ABB RESEARCH LTD

    Inventor： KLUGE-WEISS PETRA ,  GREUTER FELIX ,  STRUEMPLER RALF

    IPC: H01C7/10 ,  H01C7/112 ,  H01C7/12

    Abstract: The nonlinear resistor has varistor behaviour and has a matrix and a filler in powder form which is embedded in the matrix. The filler contains sintered varistor granules with predominantly spherical particles of doped metal oxide. These particles are made up of crystalline grains separated from one another by grain boundaries. The filler also contains electrically conductive particles, which cover at most a part of the surfaces of the spherical particles, and/or the varistor granules contain two fractions of particles with different sizes, of which the particles in the first fraction have larger diameters than the particles in the second fraction and are arranged essentially in the form of close sphere packing and the particles in the second fraction fill the interstices formed by the sphere packing.The resistor can be produced straightforwardly and cost-effectively and is distinguished by a high nonlinearity coefficient, which is desired for a good protection characteristic, and by a high power acceptance.

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