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Gas Evaporation of Zn by Means of the Top-Heating Vertical Furnace

Gas evaporation of Zn without convection was carried out in the top-heating furnace. The temperature distribution and the pressure of He gas in the furnace were controlled and the particles deposited at various places of temperature in the furnace were observed by scanning electron microscope. The conditions of nucleation and growth mechanisms of the evaporated Zn vapors were discussed.