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美国物理学家60年代曾经预言,如果我们能控制物体微小规模的排序,将获得很多具有奇特性能的物质。1984年,Cleiter首次采用气体冷凝方法,制备成功铁纳米微粉。90年代,人类对于这种介于原子、分子和宏观物质中间的纳米的研究,成为国际材料学的一大研究热点。纳米材料的特殊结构,使它产生四大效应:小尺寸效应、量子效应、表面效应和界面效应,从而具有传统材料所不具备的物理、化学特性。如TiO_2纳米陶瓷在常温下有奇特的韧性,
American physicists once predicted in the 1960s that if we could control the small-scale sorting of objects, we would get a lot of substances with peculiar properties. In 1984, Cleiter first used gas condensation method to prepare successful iron nano-powder. In the 1990s, human research into this kind of nanometer intermediate between atoms, molecules and macroscopic materials has become a hot research topic in international materials science. The special structure of nanomaterials makes it have four major effects: small size effect, quantum effect, surface effect and interface effect, which has the physical and chemical properties that traditional materials do not have. Such as TiO 2 nano-ceramic at room temperature has a unique toughness,