Barium tungsten alloy cathode material, also known as barium-tungsten cathode or barium tungsten electrode, is a special electrode material, mainly composed of a tungsten matrix and active materials (such as aluminates) filled in the pores of the matrix.
The characteristics of barium tungsten alloy cathode material mainly come from its porous tungsten matrix. This matrix has a porous property and can serve as a “reserve room” for active materials. Under working conditions, active materials such as Ba (barium) diffuse to the cathode surface through the connected pores, react with W (tungsten) on the surface, and generate free metal barium (emitting material), thereby forming a layer of W-Ba-O electron emission system on the surface of the barium tungsten cathode.
The key to this material lies in its unique electron emission mechanism. Due to the high melting point and good stability of tungsten, it can maintain the structural stability of the electrode at high temperatures. The addition of barium improves the conductivity and electron emission ability of the electrode. This combination gives the barium tungsten alloy cathode material excellent electrochemical properties, such as high stability and low capacitance.
Barium tungsten alloy cathode materials are widely used in electrochemical analysis and solution electrolysis. It can be used to measure the chemical redox potential in water, conduct experiments such as solution electrolysis and electrodeposition, and perform electrochemical analysis on samples such as heavy metal ions, halogen elements and drugs.
In addition, barium tungsten alloy cathode material is also an important component of vacuum devices. In vacuum devices, the cathode is known as the “heart”, and its quality directly affects the performance indicators, reliability and life of the device. Barium tungsten alloy cathode material has become one of the most important practical cathodes in vacuum devices with its excellent electron emission performance and stability.
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