纳米材料分为两个层次,即纳米超微粒子与纳米固体材料。 纳米固体材料是指由纳米超微粒子制成的体材料。 线度为1～100nm的纳米微粒也叫超微粒子,它的尺度大于原子簇(直径小于1nm),小于通常的微粉(直径超过1μm的粒子)。超微粒子是纳米材料制备中的原材料。 而物理学上的“超微”含义并非单纯的尺寸微小,而是当固体颗粒尺寸小到一定程度,物质的物理和化学性质 Nanomaterials are divided into two levels, that is, nano-particles and nano-solid materials. Nano-solid material refers to the nano-particles made of nano-material. Nanoparticles with a linearity of 1 to 100 nm are also called ultrafine particles. Their size is larger than atomic clusters (less than 1 nm in diameter) and smaller than the usual fine particles (particles with diameters exceeding 1 μm). Ultrafine particles are the raw materials in the preparation of nanomaterials. The physical “super micro” meaning is not purely small size, but when the solid particle size is small to a certain extent, the physical and chemical properties