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Field electron emitters are made from these materials: 3D materials, like in metals e.g. W, Mo and in metal compounds HfC3, W/C4, Co/C5, are applied as electron sources in transmission electron microscopes TEM, scanning electron microscopes SEM, and signal amplifier tubes. Technical applications longed for long lasting emitters, which are found using a 2D emitter Zr-O-W. Other 2D emitters are searched...
Assited by Co as catalyst, an interesting structure, dandelion-shaped SiCN rods, was synthesized using microwave plasma chemical vapor deposition method with gas mixtures of CH4, H2 and N2 as precursors and Si chips inserted in the sample holder at symmetrical positions around the specimen as additional Si sources. Scanning electron microscopy shows each rod has not only a column about 0.4~0.8 mum...
Nanostructuring is one of the effective approaches to lower the thermal conductivity of materials. Nanostructured skutterudite-related compounds CoSb3, Fe0.5Ni0.5Sb3, Fe0.25Ni0.25Co0.5Sb3 and Te-doped CoSb3 were synthesized by a solvothermal route. The bulk materials were prepared by hot pressing or spark plasma sintering from the solvothermally synthesized nanopowders. The thermal conductivity values...
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