Tungsten Contact Application - Switches

Tungsten contact is widely used in switches as a part to connect or disconnect the electricity. The so-called tungsten switch contact can be simply understood as the switch's contact point is made of metal tungsten, which has good heat resistance, lower resistance, good chemical stability and other advantages, and can be very good circuit connection or break, thereby reducing the probability of electrical equipment failure.

Contact made of tungsten made of metal tungsten, which is often used in industry, agriculture, science and technology and national defense. Tungsten is a non-ferrous metal and also an important strategic metal. It has a silver-white appearance, metallic luster, high melting point, great hardness, low vapor pressure, and low evaporation rate. It is widely used in many fields.

The simplest switches have two pieces of metal called "contacts". When the two contacts are connected, the current can form a loop, and vice versa. It can be said that the contact point is the most important part of the switch. Therefore, the following aspects should be paid attention to when selecting raw materials for switch contacts.

When choosing contact metal, it is necessary to consider the degree of its resistance to corrosion, because most metals will form insulating oxides after being oxidized, which will make the contact not work properly. The electrical conductivity, hardness, mechanical strength, production cost, and toxic materials should be considered when selecting contact metal.

In order to improve the performance of contact points, manufacturers often electroplating corrosion-resistant metals such as metallic nickel on the contacts or use non-metallic conductive materials such as conductive plastics, which can effectively avoid adverse effects due to air oxidation.

In recent years, with the continuous development of science and technology, most of the switch contacts now use tungsten contacts. This is mainly because tungsten contacts have more excellent physical and chemical properties than traditional contact points and are not easily oxidized in air to produce an insulator.

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