Ceramal material, and application thereof in ceramic-to-metal sealed electrode

A ceramic alloy and electrode technology, which is applied in the field of ceramic alloy electrodes, can solve the problems of complex-shaped electrode manufacturing and reduce production costs, and achieve the effects of low price, good chemical stability and stable market

Active Publication Date: 2011-10-26
刘颂辉
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a ceramic alloy material and its application in ceramic-metal sealing electrodes, to solve the problem of matching the expansion coefficient of ceramic-metal sealing electrodes and ceramics, and at the same time solve the problem of complex-shaped electrode manufacturing, while reducing production cost

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  • Ceramal material, and application thereof in ceramic-to-metal sealed electrode
  • Ceramal material, and application thereof in ceramic-to-metal sealed electrode

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Embodiment Construction

[0026] In the following, the present invention will be described by taking a ceramic-metal sealing electrode of a ceramic gas discharge tube.

[0027] Ceramic gas discharge tube is a kind of overvoltage protection device, which is widely used in overvoltage protection of network, communication, electric power, power supply and signal. It is a device with high air tightness requirements, so the expansion coefficient of ceramic and metal electrodes is required High matching. At present, the ceramic body of the ceramic gas discharge tube is made of 95 porcelain (95% aluminum oxide ceramics), and the thermal expansion coefficient is (5.5~7.5)×10 -6 / ℃, the metal electrode adopts 4J-34 iron-nickel alloy electrode, and the thermal expansion coefficient is (6.3~7.5)×10 -6 / °C, the thermal expansion coefficients of the two are close at 500 °C, and the thermal expansion coefficients at other temperatures are very different, which is a serious threat to the airtightness of ceramic gas ...

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Abstract

The invention provides a ceramal material, and an application of the material in ceramic-to-metal sealed electrodes. The ceramal material is produced from the raw materials of, by weight: 50 to 60% of ceramic powder, 35 to 45% of molybdenum powder or tungsten powder, and 5 to 10% of manganese powder. The ceramic powder and the ceramic product have a same formula. With the technical scheme of the present invention, a problem of coupling between ceramic-to-metal sealed electrodes and expansion coefficient of ceramics is solved, a problem in producing electrodes with complicated shapes is solved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a ceramic-based composite material in ceramic-metal sealing technology, in particular to a ceramic alloy electrode for ceramic sealing and welding. Background technique [0002] Ceramic alloys are new composite materials that combine the high temperature resistance and corrosion resistance of ceramics with the ductility and toughness of metals. Ceramics are widely used in the fields of electronics, electrical engineering, and electrical appliances due to their advantages of insulation, temperature resistance, wear resistance, good thermal stability, and good chemical stability, but they are all inseparable from the use of metal materials with good conductivity. At present, the method of connecting ceramics and metal materials is mostly ceramic metallization, using silver-copper materials and glass solder or tin solder through high-temperature sealing welding to connect ceramics and metal electrodes. Metal electrodes are mostly...

Claims

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Application Information

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IPC IPC(8): C22C29/00
Inventor 刘颂辉
Owner 刘颂辉
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