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    • 3. 发明授权
    • Zinc oxide varistor
    • 氧化锌变阻器
    • US4559167A
    • 1985-12-17
    • US676303
    • 1984-11-29
    • Elias JulkeTony KaiserMaged A. OsmanRoger Perkins
    • Elias JulkeTony KaiserMaged A. OsmanRoger Perkins
    • H01C7/10H01C7/102
    • H01C7/102Y10T428/31609Y10T428/31663Y10T428/31786
    • A varistor of metal oxides, predominantly zinc oxide (ZnO), is provided on its lateral surface between two contact faces, with a coating consisting at least partially of an organic polymer. In order to prevent rapid degradation in oxygen-free surroundings, the coating contains at least one oxygen barrier layer or is formed entirely as such a layer, which contains filler particles in an organic matrix material. The filler is here taken from the group comprising the following substances or groups of substances: synthetic mica, natural mica, vermiculite, micaceous iron ore, glass and other non-metallic inorganic substances present in the form of platelets or flakes; metal oxides, active part material in a pulverulent form and other oxygen-releasing inorganic substances. The organic matrix material is selected from the group comprising epoxide resins, alkyd resins, polyurethanes, silicone resins, unsaturated polyester resins and acrylates. The oxygen barrier layer or layers can be formed by a coating consisting of a band with a carrier of paper, plastic or glass fabric, the band being wound once or several times around the active part.
    • 在两个接触面之间的侧表面上提供主要为氧化锌(ZnO)的金属氧化物的变阻器,其中涂层至少部分由有机聚合物组成。 为了防止无氧环境中的快速降解,涂层含有至少一个氧阻隔层,或者完全形成为在有机基质材料中含有填料颗粒的层。 这里的填料来自包括以下物质或物质组的组:合成云母,天然云母,蛭石,云母铁矿石,玻璃和其它以血小板或薄片形式存在的非金属无机物质; 金属氧化物,粉状形式的活性成分材料和其它释放氧的无机物质。 有机基质材料选自环氧树脂,醇酸树脂,聚氨酯,硅树脂,不饱和聚酯树脂和丙烯酸酯类。 氧阻隔层可以通过由具有纸,塑料或玻璃织物的载体的带组成的涂层形成,该带围绕活性部分缠绕一次或数次。