Ag-30Pd超细合金粉的化学法制备

Preparation of Ag-30Pd Superfine Alloy Powders by Chemical Method

银钯合金粉是厚膜导电浆料中使用的重要原料。这种合金粉可采用化学法制备。按Ag:Pd=70:30准确称取银粉和钯粉,以硝酸溶解后,用氨水络合形成稳定的络合物,调整溶液的pH=2～4,混合搅拌均匀;在30～50℃的温度下,边搅拌边将络合物混合液反滴入盛有还原剂和分散剂的容器中,经洗涤、烘干后,得到Ag-30Pd絮状合金超细粉末。该合金粉末可用于制备厚膜浆料,可靠性能高。

Silver palladium alloy powder is an important raw material that utilized in thick film conductive pastes.This kind of alloy powder could be produced chemically.Silver and palladium powders accurately weighing as Ag:Pd=70:30,after dissolving in nitric acid,complexation with ammonia to form the stable complexes.Next step is adjusting the solution’s pH to 2~4,and mixing and stirring the solution evenly.When the temperature between 30~50°C,the mixed complexes solution back-dried into the container that containing the reducing agent and the dispersant while stirring.After washing and drying,a Ag-30Pd flocculent ultrafine alloy powder taken shape.The alloy powder could be utilized to produce the thick film slurry,which has good reliability.