Abstract: A series of potassium vanadium phosphates K₃Sb₃P₂O₁₄,K₂SbPO₆,KSbP₂O₈,KSb₂PO₈,K₅Sb₅P₂O₂Oand Li_2+2xZn_1-xGeO₄(0.36<x<0.85) were synthesized for the first time by microwave radiation,All microwave reactions are usually completed within₆₀～120 minutes at a microwave frequency of 2450 MHz and power of 50～650 W.The XRDpatterns and SEMphotographs indicate that the grains of samples prepared by microwave heating are small and uniform.Compared with the conventional synthetic method,the microwave dielectric heating effect not only leads to the dramatically rapid rate of solid state reaction,but also allows some control of materials'properties and reaction selectivity.The results of preliminary study on the mechanism of microwave radiation synthesis show that the heating media can stimulate the absorption of micro-wave radiation by the reactants,and then the ionic diffusion rate on the interface of reactant and product increased.The formation of crystallites of fast ionic conductor and the crystal growth were also induced by microwave dielectric loss heating.

Key words: Microwave synthesis, Fast ionic conductor, Mechanism of microwave synthesis