摘要
为了得到低密度纳米多孔金块材,以纳米Ag粉为模板,采用化学镀Au制备前驱体Ag/Au复合粉体,采用预压-管式炉低温热处理-两步法自由腐蚀制备了低密度纳米多孔金。纳米多孔金的微观结构由300～500nm的大孔和10～40nm的小孔双级孔组成,密度约为1.1g/cm3,孔隙率可达94.3%。同时系统地研究了腐蚀过程中前驱体制备工艺参数对纳米多孔金的收缩程度和孔隙率的影响规律。结果表明：Ag/Au复合粉体中Au含量的增加,预压压力的增大,热处理温度的提高均会使多孔金的孔隙率降低。
For the low-density block nanoporous gold（NPG）,using nano Ag powders as templates,precursor Ag/Au composite powders were prepared during gold electroless plating.Then the low-density block nanoporous gold samples were prepared by preloading-tube furnace heat treatment at low temperature-two-step free corrosion process.The porous structure of NPG consisted of two kinds of pores：300-500 nm,and 10-40 nm.The pore＇s density was about 1.1g/cm3 and it had porosity of 94.3%.Meanwhile,the effect of the preparation technologies of precursor agent on the shrinkage and porosity of NPG in the process of corrosion were investigated systematically.The results show that with the increase of the content of Au in Ag/Au composite powder,both preloading pressure and heat treatment temperature will reduce the porosity of porous gold.
出处
《中国科技论文》
CAS
北大核心
2016年第10期1175-1178,共4页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20110181110002)
四川省科技支撑计划资助项目(2014GZ0137)
关键词
金属材料
纳米多孔金
预压
热处理
孔隙率
metallic material
nanoporous gold
preloading
heat treatment
porosity
