▎ 摘　　要

NOVELTY - Preparing graphene nano silver composite material involves mixing graphene oxide and silver nitrate. The mass ratio of graphene oxide and silver nitrate is 1:2.3-1.8-1. The obtained mixture is added with deionized water. The obtained mixture is dispersed ultrasonically for 1 hours. The obtained mixed solution is placed in the container. The obtained mixture is stirred at room temperature for more than 18 hours. The obtained mixture is added with hydrazine hydrate. The obtained mixture is kept stand at 95 degrees C or more for 20 hours. USE - Method for preparing graphene nano silver composite material (claimed). ADVANTAGE - The method enables to prepare graphene nano silver composite material in a cost-effective manner, and has excellent thermal conductivity. DETAILED DESCRIPTION - Preparing graphene nano silver composite material involves mixing graphene oxide and silver nitrate. The mass ratio of graphene oxide and silver nitrate is 1:2.3-1.8-1. The obtained mixture is added with deionized water. The obtained mixture is dispersed ultrasonically for 1 hours. The obtained mixed solution is placed in the container. The obtained mixture is stirred at room temperature for more than 18 hours. The obtained mixture is added with hydrazine hydrate. The obtained mixture is kept stand at 95 degrees C or more for 20 hours. The obtained mixture is washed with deionized water. The obtained mixture is again washed with anhydrous ethanol. The obtained washed product is vacuum dried at 30 degrees C.