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    2.
    发明专利
    未知

    公开(公告)号：AT403935T

    公开(公告)日：2008-08-15

    申请号：AT04405210

    申请日：2004-04-06

    Applicant: ABB RESEARCH LTD

    Inventor： GRAMESPACHER HANSJOERG ,  HAGEMEISTER MICHAEL ,  KLUGE-WEISS PETRA ,  GREUTER FELIX ,  DONZEL LISE ,  KESSLER RETO

    IPC: H01C7/10 ,  C04B14/04 ,  H01C7/00 ,  H01C7/112 ,  H01C17/065

    Abstract: The invention relates to a nonlinear electrical material with improved microvaristor filler (1'), to devices and electrical apparatuses comprising such nonlinear electrical material and to a production method thereof. According to invention, the filler (1') comprises larger spherical particles (5) and smaller irregular particles (6) that are arranged interstitially and provide non-point-like and/or multiple contact areas (56, 56a, 56b, 66) owing to their irregular outer shape comprising edges and faces. Embodiments, among other things, relate to: spherical particles (5) being calcinated and broken-up to retain their original shape; irregular, spikly shaped, particles (6) obtained by calcinating or sintering and crushing or fracturing granules or blocks; and addition of a third filler fraction. Advantages, among others, are: higher filler contents, more and more durable inter-particle contacts (56, 56a, 56b, 66), enlarged effective micro-contact area, and improved electrical performance of the nonlinear electrical material.

    METODO DE FABRICACION DE UN VARISTOR DE OXIDO DE METAL Y VARISTOR REALIZADO DE ACUERDO CON ESTE METODO.
    6.
    发明专利
    METODO DE FABRICACION DE UN VARISTOR DE OXIDO DE METAL Y VARISTOR REALIZADO DE ACUERDO CON ESTE METODO. 未知

    公开(公告)号：ES2239437T3

    公开(公告)日：2005-09-16

    申请号：ES99810304

    申请日：1999-04-13

    Applicant: ABB RESEARCH LTD

    Inventor： GREUTER FELIX DR ,  HAGEMEISTER MICHAEL ,  KLUGE WOLFGANG DR

    IPC: H01C1/14 ,  H01C1/142 ,  H01C7/108 ,  H01C17/28

    Abstract: EL PROCEDIMIENTO SIRVE PARA LA FABRICACION DE UN VARISTOR, QUE TIENE UN CUERPO DE RESISTENCIA CILINDRICA (1) FORMADO POR UN MATERIAL DE OXIDO METALICO, ASI COMO DOS ELECTRODOS (2, 3) COLOCADOS CADA UNO SOBRE DOS SUPERFICIES FRONTALES, QUE SON PARALELAS ENTRE SI, DEL CUERPO DE RESISTENCIA CILINDRICO (1). EN UNA PRIMERA ETAPA DEL PROCEDIMIENTO SE COLOCA SOBRE AMBAS SUPERFICIES FRONTALES UNA CAPA DE MATERIAL DE ELECTRODOS HASTA QUE SE FORME UN BORDE EXTERNO (9). EN UNA SEGUNDA ETAPA DEL PROCEDIMIENTO SE RETIRA DE LOS ELECTRODOS UN ANILLO (4) QUE TIENE UNA ANCHURA DE APROXIMADAMENTE 10 A 500 MI M Y QUE SE HA LLEVADO HASTA LA SUPERFICIE FRONTAL DEL CUERPO DE RESISTENCIA (1) Y QUE ESTA LIMITADO POR EL BORDE EXTERNO (9), O SE BISELAN (5 '') EL CUERPO DE RESISTENCIA (1) Y ELECTRODOS EN EL BORDE EXTERNO. EL PROCEDIMIENTO HACE POSIBLE UNA FABRICACION SENCILLA Y ECONOMICA DE UN VARISTOR.

    7.
    发明专利
    未知

    公开(公告)号：DE602004015567D1

    公开(公告)日：2008-09-18

    申请号：DE602004015567

    申请日：2004-04-06

    Applicant: ABB RESEARCH LTD

    Inventor： GRAMESPACHER HANSJOERG ,  HAGEMEISTER MICHAEL ,  KLUGE-WEISS PETRA ,  GREUTER FELIX ,  DONZEL LISE ,  KESSLER RETO

    IPC: H01C7/10 ,  C04B14/04 ,  H01C7/00 ,  H01C7/112 ,  H01C17/065

    Abstract: The invention relates to a nonlinear electrical material with improved microvaristor filler (1'), to devices and electrical apparatuses comprising such nonlinear electrical material and to a production method thereof. According to invention, the filler (1') comprises larger spherical particles (5) and smaller irregular particles (6) that are arranged interstitially and provide non-point-like and/or multiple contact areas (56, 56a, 56b, 66) owing to their irregular outer shape comprising edges and faces. Embodiments, among other things, relate to: spherical particles (5) being calcinated and broken-up to retain their original shape; irregular, spikly shaped, particles (6) obtained by calcinating or sintering and crushing or fracturing granules or blocks; and addition of a third filler fraction. Advantages, among others, are: higher filler contents, more and more durable inter-particle contacts (56, 56a, 56b, 66), enlarged effective micro-contact area, and improved electrical performance of the nonlinear electrical material.

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