Preparation of tetrapod-like ZnO whiskers from waste hot dipping zinc^①

来源期刊：中南大学学报(英文版)2004年第1期

论文作者：陈艺锋 唐谟堂 杨声海 张保平 杨建广

文章页码：51 - 54

Key words：waste hot dipping zinc; tetrapod-like ZnO whisker; preparation; crystal morphology

Abstract: Large and uniform tetrapod-like ZnO whiskers (T-ZnO) were prepared from waste hot dipping zinc by vapor oxidation and examined by means of X-ray diffraction and ICP-AES analysis and scanning electron microscope. The prod-ucts are pure hexagonal wurtzite crystals with tetrapod shape and edge size of center body 5 6μm and needle length of 100 130μm. The size and shape of ZnO particles are fully controlled by the growth conditions and T-ZnO can be ob-tained only at 850 1 000℃and total gas flow rate ranging from 40 to 250 L·h-1in which the size of the T-ZnO parti-cles varies slightly with temperature. The process of the formation of T-ZnO is that T-ZnO may nucleate at the initial stage with a complete tetrapod shape and develop to the large size, but not the process of preferential growth of octahedral nuclei and subsequent growth of the needles. The experiment presents a new method to prepare T-ZnO economically by using the waste hot dipping zinc.