Tungsten electric needles are an electron source with the advantages of high brightness, good stability, and long service life. They are widely used in electron microscope tests. Its uses mainly include the following aspects:
1. Electron microscope test: Tungsten electric needles are used as electron sources to generate high-energy electron beams to scan the surface of the sample, thereby stimulating various physical and chemical information of the sample. This information includes morphology, composition, crystal structure, etc. By using tungsten electric needles as electron sources, higher resolution and higher quality images can be obtained.
2. Heater: In some electron microscope tests, the sample needs to be heated to change its physical and chemical properties. At this time, the tungsten electric needle can be used as a heater to heat the sample surface through electric current to achieve heating and property changes of the sample.
3. Lead material: In electron microscope tests, it is necessary to introduce current from the test instrument to the sample surface for testing. Tungsten electric needles are used as lead materials to introduce current from the test instrument to the sample surface to achieve current transmission and control.
4. Other applications: Tungsten electric needles can also be used in ion accelerators as the main tool for generating plasma, and can be used in plasma spraying as an advanced technology for surface repair and material forming.
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