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We have fabricated two type of graphite field emission cathodes: graphite nanospines (GNS) and graphite field emitters inflamed at high temperatures (GFEIHT) and applied for X-ray tubes using these cathodes. The morphologies and structures of the two cathodes were quite different. However, these emitters have excellent field emission characteristics. Raman spectroscopy indicated that GFEIHT consisted...
We report a new carbon material with nanostructures, known as inflamed graphite at high temperature (IGHT). IGHT is fabricated by inflaming material in a mixture of hydrogen and oxygen gas at a temperature exceeding 2000 °C. Fabricated IGHTs are encapsulated in a glass chamber in order to estimate the field emission current. The chamber pressure is as high as 10−7 Pa. A field emission current exceeding...
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