Preparation of YAG Nanoparticles by Sol-Gel and its Application in Electrical Contact Material

Abstract:

YAG nanoparticles were prepared by sol - gel method using yttrium nitrate (Y(NO₃)₃6H₂O) and aluminum nitrate (Al(NO₃)₃9H₂O) as the main raw materials and hexamethylenediamine as the catalyst. Ag / YAG electrical contact composites were fabricated by powder metallurgy. And the microstructure and properties of them were characterized by XRD, SEM, TEM, FTIR and so on. The results showed that pure YAG nanoparticles were successfully synthesized by sol-gel method with the bath temperature of 50℃. The size of YAG nanoparticles increased with the increasing of the amount of hexamethylenediamine.And low resistivity and high hardness (>80Hv) of Ag / YAG electrical contact composite were obtained when sintering temperature reached 860℃.

Key words:Sol-Gel, YAG, Ag-based;electrical contact;materials, Powder;Metallurgy