Abstract: Single phase Na₅YSi₄O₁₂ which is difficult to be prepared by conventional solid state reaction, was synthesized by microwave radiation synthesis method.The relationship between synthesis conditions and the phases in products was discussed.Acomparison was made of the properties of samples prepared by Sol-Gel method with those by microwave radiation synthesis method,respectively.Compared to conventional Sol-Gel method, the experimental procedure was much simplified and reaction time was shrtened when Na₅YSi₄O₁₂ was prepared by microwave radiation synthesis method.The sample prepared by microwave method has a particular micro-structure,aggregating state and defect structures, which leads to the decrease of ionic conducting activation energy.

Key words: Microwave radiation synthesis, Na₅YSi₄O₁₂, Ionic conductor