• Categories:Company News
• Author:
• Origin:
• Time of issue:2021-11-12
• Views:0

(Summary description)Nanomaterials can be divided into three categories: one is one-dimensional nanoparticles; the other is two-dimensional nanosolids (including films and coatings, tubes, wires); and the third is three-dimensional nanomaterials (including mesoporous materials). Nano materials have good mechanical properties, such as high strength, high hardness and good plasticity. The yield strength and hardness of metallic materials increase as the grain size decreases. At the same time, plasticity and toughness are not sacrificed. The surface effect and quantum size effect of nanomaterials have a great influence on the optical properties of nanomaterials. For example, its infrared absorption spectrum has a broad band, the fine structure in the absorption spectrum disappears, and the mid-infrared has a strong light absorption capacity. The smaller the particle size of nanomaterials, the shorter the mean free path of electrons, and the more serious the deviation from the ideal periodic field, which makes its conductivity special. When the grain size reaches the nanometer level, the metal will show non-metallic characteristics.　The big difference in magnetic structure between nanomaterials and conventional materials must be manifested in magnetic properties. When the grain size is reduced to a critical size, conventional ferromagnetic materials will become paramagnetic or even in a superparamagnetic state. The specific surface area/volume of nanomaterials is very large, so it has quite high chemical activity, especially in terms of catalysis, sensitivity and response performance.