Application of microwave synthesis

Microwave heating is fast, uniform and selective, and has been widely used in the synthesis and processing of various materials. By designing different microwave absorbing materials and microwave field distribution, the material processing effects in specific areas can be achieved, such as powder surface modification, high-density film formation, and composite of heterogeneous materials. The catalytic effect of microwave on chemical reaction process can make reactants have higher reaction rate and products have better crystallinity under the action of microwave. Due to the high penetration of microwave and the function of specific materials, materials that are difficult to manufacture, such as nano-powder particles with good crystallization and dispersion, can be obtained through material synthesis design and microwave field action. The function of microwave energy provides a method to synthesize nano-materials with new structure.

The surface-coated nano-powder prepared by microwave radiation in solution has the advantages of high crystallinity and high dispersibility, and the yield of the product is very high. In the field of thin film preparation, thin films with a thickness of several microns are prepared on organic substrates. Under the action of microwave energy, the film has a high degree of compactness, and its characteristics are equivalent to those of bulk materials sintered directly with powder. A new method for preparing thin films with high dielectric, piezoelectric, magnetic and conductive properties on organic substrates and a microwave nano-powder film-forming technology are provided.

Microwave is also widely used in the field of material processing. The high penetration of microwave field provides the feasibility for uniform heating of materials, which can instantly heat specific areas, increase the freedom of material heat treatment, and provide material characteristics that traditional heating technology can not achieve, so that microwave field has new applications in material modification and processing technology. Nano-materials will make materials have many special functions, and the introduction of microwave provides a new idea for the realization of special functions of materials. Although the behavior of materials in nano-scale microwave field remains to be studied, the strengthening effect of microwave field provides a new technology for the synthesis of nano-materials.