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Ensinger PEI

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3M Tungsten Dispenser Cathodes
Categories: Other Engineering Material

Material Notes: 3M™ Tungsten Dispenser Cathodes typically consist of a porous tungsten matrix, impregnated with a barium based emission enhancing material. Depending on the application, this matrix may also be a mixed metal, such as tungsten iridium or tungsten molybdenum (for SEMBO cathodes). Dispenser cathodes are used in all types of vacuum devices, as well as in inert and reducing atmospheres. The most common applications include TWTs, klystrons, magnetrons and plasma devices.

Information provided by 3M™

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Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 910 °C
 
Descriptive Properties
Life Expectancy3000-15000 hr
Size0.25-200 mm
Tungsten Density Range74-84%

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